Aganane Formation

Aganane Formation
Stratigraphic range: Pliensbachian
~192–184 Ma
Exposed lagoonal sequences of the Aganane Formation in South Todhra
TypeGeological formation
Unit ofHigh Atlas
Underlies
Overlies
AreaCentral High Atlas
Thickness600 m
Lithology
PrimaryLimestone, dolomite
OtherSandstones, Claystone, Shale, Conglomerate
Location
Coordinates31°36′N 6°24′W / 31.6°N 6.4°W / 31.6; -6.4
Approximate paleocoordinates25°54′N 4°18′W / 25.9°N 4.3°W / 25.9; -4.3
Region
CountryMorocco
Type section
Named forAganane Village, near Tizouggaghiyn
Aganane Formation is located in Morocco
Aganane Formation
Aganane Formation (Morocco)

The Aganane Formation is a Pliensbachian (Early Jurassic), with some levels being potentially Latest Sinemurian, geologic formation in the Khenifra, Midelt, Azilal, Béni-Mellal, Ouarzazate, Tinerhir and Errachidia areas, in the Middle and High Atlas of Morocco, being the remnant of a local massive Carbonate platform, and known mostly for its rich tracksites (up to 1350 tracks in 1988) including footprints of dinosaurs.[1][2][3] Is (in part) coeval with the Calcaires du Bou Dahar.[4] This unit is know by other multiple synonymous names such as Aït Chitachen, Aït Bazzi, Aghbalou or Assemsouk Formation in the High Atlas and Calcaires de Tizi Nehassa in the Middle Atlas.[5][6][7]

This formation has been dated to the Pliensbachian stage of the Lower Jurassic, thanks to the find of the ammonite Arieticeras cf. algovianum, indicator of Middle Domerian (=Uppermost Pliensbachian) in the upper zone, and lower delimitation by the foraminifers Mayncina termieri and Orbitopsella praecursor (indicators of Lower Pliensbachian age).[8]

The Aganane Formation starts at the W sequences referred to either the synonyms "Aït Chitachen/Aït Bazzi" Formations at sectors such as Demnate or Telouet (continental-fluvial, coastal lagoon) and Azilal area.[9] At Tazoult, part of the Azilal profile contacts the bottom with the karst Talmest-Tazoult Formation, then a section where the Aganane itself indicates an eastward expansion of the carbonate facies, finally, a westward advance of the Imilchil pelagic facies, mostly part of the Jbel Choucht Formation or Ouchbis Formation.[9]

Lithology

[edit]
A) Shallowing upward sequence with lower lagoonal marine, then intertidal algal laminations and top cycle an hurricane breccia in a dolomitic matrix; B) Metric emersive cycle with deposition of marine lagoon then dolomitized algal laminations in intertidal to supratidal environment.

The Aganane Formation is a thick carbonate sequence, up to 600 m, stratigraphically positioned between the Imi-n-Ifri Formation (dolomites and limestones) and the Tafraout Group (red sandstones and pelites). Its boundaries are mostly transitional, though local erosional discordances occur.[10]

Lithologies vary across the basin. In the SW (Demnate area), facies include brecciated dolomites with gypsum lenses, cavernous dolomites, red marls, and basal sandstone-pelitic layers with rhizoliths, indicating episodes of desiccation. Towards Azilal, the unit is dominated by cyclic dolomitic and calcareous beds, with interbedded marls and fossil-rich limestones, organized into three subunits reflecting successive marine to emergent phases.[11] At Zaouiat Ahansal is divided in 3 sub-units: 1st with red marls and features fossil-rich limestones, evolving from mudstones to oolitic grainstones, capped by an oxidized discontinuity; 2nd mirrors this lithology but spanning packstones to biomicrites with algae and oncoliths and finally the 3rd begins above an emersion surface and ends the formation with thick, fossiliferous limestones transitioning to detrital deposits, marked by tectonic cracks at its top.[12] Around the Goulmima fault, thick evaporitic successions (gypsum and anhydrite) developed in subsiding sebkhas ("Aghbalou formation"), later redefined as specific facies of this formation.[7]

Characteristic features include stromatolitic dolomites, diverse microfacies (mudstones, packstones, grainstones, biomicrites), biostromes with large bivalves, intraformational megabreccias, and cyclic deposits with siliceous nodules.[2] Sedimentary structures such as Stromatolites, Teepee-like features, and desiccation cracks indicate repeated emergence, supporting the interpretation of a dynamic coastal to intertidal depositional system.[11][13]

Environments

[edit]
A) Metre-scale peritidal sedimentary cycles in two outcrops 230 km apart, with storm beds and possibly tsunamites include abundant reworked foraminifera. B) Virtual metric "shallowing upward sequence" observed all along (more than 10,000 km) the south Tethyan margin

The Aganane Formation represents the coastal–shallow sector of a large carbonate platform, where diagenetic features consistently recorded environmental changes and may even reflect major events such as Hurricanes.[14][15] The formation displays marked west–east variations: red marly lagoonal–brackish deposits grade into lagoonal facies (locally evaporitic), then into marly–dolomitic and marly–calcareous lagoonal–marine facies. At the eastern edge of the Afourar map, it becomes coralligenous, integrating with underlying calcareous–dolomitic strata to form a reefal complex. This reefal barrier separated the cephalopod-rich facies of the Inner Atlas, complicating stratigraphic correlations.[16]

The supratidal sector is diverse, including quartz-rich continental deposits, fluvial channels, and thick gypsum–cargneule successions, along with dolomitic shales and marls containing desiccation cracks, caliche crusts, and pisoliths.[17] These indicate a continental zone bordering river systems, grading into coastal sabkhas where shales, siltstones, and interstitial evaporites accumulated.[18][14] North of the Demnate fault, a broad subsiding tidal flat developed, where carbonate deposits with gypsum relics and stromatolitic laminites formed, interspersed with desiccation polygons and gypsum precipitated in sebkhas, suggesting an arid climate.[10] Along the Demnate fault, lignite layers appear, probably derived from degraded forests to the south, as indicated by root traces in basal sandstones (locally the "Aït-Bazzi Formation") near Aït Tioutline, and laterally expressed as red marls with paleosols and chaotic dolomitic sequences in W Zaouiat Ahansal.[6] Herbivorous and carnivorous dinosaurs also inhabited these coastal marshlands.[10]

The Aganane Fm records varied carbonate platform environments: supratidal paleosols (ex. Red Sea mangroves), coastal sabkhas (Imlily, near Dakhla), mangrove-like intertidal settings with stromatolites (ex. Lake Bacalar), and shallow marine microbialite–coral associations (ex. Red Sea).

In the intertidal zone, pelletoid lime packstones and wackestones, often bioturbated, indicate shallow low-energy conditions with variable terrigenous input. Fenestral fabrics and bivalves also support intertidal to shallow subtidal environments.[17] Mudstones and wackestones with occasional bivalves represent brackish–lagoonal settings, while oolitic cross-bedded grainstones mark high-energy tidal bars. Crinoid and mollusc-rich packstones reflect quieter shoal environments.[17] Algal laminated boundstones developed in both supratidal and intertidal zones, similar to modern Shark Bay and the Persian Gulf. Pelletoid packstone–wackestone facies likely formed in tidal flats, comparable to present-day mangrove belts.[18][14] More massive facies with Plicatostylidae bivalves separated tidal flats from open marine deposits with Ammonites, whose extent reached the eastern Azilal margin.[10]

Subtidal deposits include lagoonal skeletal packstones, oolitic tidal deltas, offshore bars, oncoliths, and coral reefs. Occasional Opisoma bivalves occur, while farther east flint-bearing calcareous shales with ammonites signal more open-marine conditions.[14][18]

Dinosaur tracks at Tabant

Reefs from Ait Athmane, Aghbalou N'Kerdous and Assemsouk show typical SinemurianPliensbachian Plicatostylidae assemblages.[19][20][21] Locally, these reefs evolved from shallow subtidal floatstones to layers with lagoonal marls, red mudstones with root traces, and calcrete, indicating subaerial exposure.[20] The faunas include aberrant Plicatostylidae (Lithioperna, Cochlearites), corals, gastropods, Opisoma, and oncoids, forming sheltered lagoonal communities comparable to the Rotzo Formation of the Trento Platform.[20] At Jebel Azourki, biofacies include tidal-channel structures, bivalve mounds, cross-bedded channel fills, and clustered bioherms.[19] The "Assemsouk Structure", a massive bivalve reef (125 m high, 1.25 km long), preserves growth stages with corals and stromatolites, later faulted into a narrow turbiditic trough and buried by marine marls.[22][23] The depositional environments span from supratidal flats to subtidal zones, with regressive phases marked by barrier islands, followed by anoxic lagoonal shales with coal seams and plant fragments.[19][24][25]

Diapirism

[edit]
Modern Farasan Islands within the Red Sea, an analogue of the local Diapirs in the Lower Jurassic. Like their modern counterparts, local diapirs remained as highs respect to surrounding sea, emerging as low tophography Islands.

Modern Farasan Islands within the Red Sea, an analogue of the local Diapirs in the Lower Jurassic. Like their modern counterparts, local diapirs remained as highs respect to surrounding sea, emerging as low tophography Islands.At Talmest-Tazoult, the presence of diapirs (like the "Tazoult salt wall") is remarkable. In the Pliensbachian, this area begins with the deposition of the Jbel Choucht carbonate platform, followed by uplift and salt wall growth causing erosion of the karst and deposition of syn-diapiric breccias, conglomerates, and sandstones (Talmest-Tazoult Formation), and then is invaded from the west by the shallow marine carbonate platform of the Aganane Formation.[26] At this time, a decrease in the growth rate of the diapir is detected compared to the Sinemurian.[27] In fact, with the eastward extension of the Aganane Formation, the Tazoult salt wall registers a major change towards shallower facies, confirming a higher diapir relief and a decrease in water depth towards this area during the Pliensbachian, not excluding a complete stop of diapir activity in this interval.[26] Pliensbachian carbonate platforms likely formed above salt walls, similar to the La Popa Basin (Monterrey). Small-scale karstic cavities filled with meteoric sediments at the platform top further highlight this transition. The Aganane limestones were later overprinted by modified marine fluids during burial, leading to localized dolomitization under reducing conditions. This transformation suggests a late diagenetic phase linked to burial processes, potentially continuing into early shallow burial stages.[28] The diapirs remained as bathymetric highs and emerged islands that allowed the proliferation of Plicatostylidae and other organism colonies during the deposition of the Aganane Fm, as well they created hemipelagic deeper facies between them.[28][29]

Climate

[edit]

The Pliensbachian High Atlas trough, situated within a photozoan-dominated carbonate system that formed in a warm, semi-arid to arid climate.[21] Clear, nutrient-poor waters supported organisms such as Plicatostylidae, while ooids, evaporites (gypsum), and calcretes indicate high evaporation and limited freshwater input.[21] The Reef facies featured a nearshore, tropical setting, with dominant Plicatostylidae bivalves and co-existing scleractinian corals, possibly photosymbiotic, suggest warm, clear, oligotrophic conditions.[30]

Sedimentological evidence, including cross-bedding in oolite and clastic shoals, wind-blown red muds, and fine sands points to strong winds as a primary sediment transport mechanism, comparable to modern Shark Bay (Australia) or Persian Gulf settings. Periodic storms influenced sediment redistribution, forming erosional and depositional features in lagoons and tidal flats.[17] The surrounding low-lying hinterland experienced little runoff and was primarily eroded by wind.[17]

Salinity varied across the trough: marginal intertidal zones experienced hypersaline conditions, while central and southern areas maintained near-normal marine salinity during transgressions, as indicated by Ophiomorpha burrows and faunal assemblages.[17] Intertidal zones intermittently supported salt-tolerant plants, leaving organic seams in low-salinity patches. Sedimentary structures like cross-bedding in oolite and clastic shoals, as well as channel directions, were recorded but showed high variability and no consistent trends, likely due to the complex interplay of tidal currents, islands, promontories, mud mounds, shoals, and storm influences in this tidally dominated environment.[17]

Depositional settings

[edit]
Footprints of a giant Sauropodomorph dinosaur, at the top of an emersive "shallowing upward" carbonate cycle

The Aganane Formation records a spectrum of shallow marine to coastal depositional environments during the Pliensbachian. The lower and middle parts are dominated by light gray, dolomitic limestones with rhythmic layering, representing tidal-flat–like coastal zones periodically inundated by seawater. Localities such as Ait Athmane and Tizi n'Terghist preserve rhizoliths, tree trunks, red clay paleosols, and pisoids, indicative of pedogenic or freshwater conditions with episodic exposure.[20][31][32] Other sites show biodetritic limestones with emersion features, including dolomitization, mud cracks, plant remains, and dinosaur footprints.[32] Coastal lagoons and supratidal plains—recorded at Assemsouk and Aghbalou N'Kerdous—contain cross-bedded clastic carbonates, microbial structures, and evidence of storm-induced deposition.[21][25][33] Red and white marls, thin dolomite layers, and evaporites suggest alternating exposure and flooding, reminiscent of modern sabkha environments, with tropical conditions comparable to the Andros Island model in the Bahamas.[33]

Depositional environments and associated foraminifera of the Aganane Formation

Further offshore, the platform transitions to more open lagoons dominated by shallow marine conditions. Sediments include mud-rich limestones and dark biodetrital limestones, with marine fauna such as lamellibranchs, gastropods, brachiopods, calcareous algae (Palaeodasycladus, Solenopora, etc.) oncoliths and Foraminifers. Large bivalves like Plicatostylidae, form shell beds shaped by tidal currents.[33][34] Gray, organic-rich sediments indicate low-oxygen, calm-water deposition, with subtidal oncolitic lime wackestones reflecting occasional higher-energy mixing.[17]

In wave-exposed zones, sediments coarsen and reef-related bioclastic limestones appear, with coral colonies and sea urchins forming patch reefs. These reefs protected inner lagoons, allowing finer sediments to accumulate behind them.[33]

Frequent episodic storms caused repeated reworking and lateral displacement of facies, generating asymmetric cycles 2-4 meters thick in shallow lagoon bottoms and behind offshore bars or reef belts.[2] These cycles likely reflect regressive events driven by global sea-level fluctuations and local tectonics, illustrating the dynamic interplay of marine, coastal, and storm-influenced processes.[2]

Paleogeography

[edit]
Sinemurian-Pliensbachian Paleogeography of N Africa, with closeup reconstruction of the High Atlas, including the Aganane Fm.

During the Pliensbachian, the region lay at near-tropical latitudes along the western edge of the "Atlas Gulf," facing the Tethys Sea. Deposition was concentrated along the North Atlas Fault, with up to 700 m of carbonates N, while around 200 m S.[14] This fault line probably marked the northern boundary of a Paleozoic basement peninsula that advanced eastward from the Tichka Massif into the Atlas Trench.[14] Pre-existing subsidence controlled deposition in areas like Haute Moulouya, Itzer Facies, Causse d’Ajdir, Amezraï, and Aït Bouguemez.[2][32][35]

Paleogeographic evolution can be summarized in three stages:

  • Lower Pliensbachian ("Carixian"): tidal flats and subtidal platforms on the southern slopes of the Central High Atlas; Plicatostylidae colonized areas along the NE-SW fault separating the Tilougguite trough from its northwest platform.[6][36]
  • Middle Pliensbachian ("Carixian–Domerian"): marine expansion along the western High Atlas Basin with rhythmic carbonates in the Tilougguit Trench, turbidites on the SE edge of the Beni-Mellal platform, and subsident lagoons in other sectors.[6] Key faults include the Demnate Fault and North Atlas Fault, while the Telouet Graben remained stable.[36]
  • Upper Pliensbachian (Upper Domerian): contrasted platform conditions with emersion at Demnate, paleosols and karst development, lignite deposits along active faults, carbonate and terrigenous sedimentation in small basins like Tamadout and Taquat N’Agrd, and shoals at Jbel Taguendouft. Central zones deepened near Jbel Azourki-Jbel Aroudane, forming the early structural framework of the High Atlas basin.[36]

Foraminifera

[edit]
Color key
Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon
Notes
Uncertain or tentative taxa are in small text; crossed out taxa are discredited.

Local Foraminifers have been the major reference to establish the local different environmental settings, as its distribution is clearly based on cyclic sedimentary evolution: the base banks "Term A" represents a shallow subtidal setting with rich thanatocoenosis of Siphovalvulina, Mayncina or Orbitopsella, associated with an intensely bioturbated environment, analogous to present Bahamas, Florida or Persian Gulf.[33] In the Aganane type section limestone beds (biopelmicrite) rich in Orbilopsella, Haurania or Pseudopfenderina could be interpreted as brought by tidal currents covering the supratidal zone. In "Term B" a thanatocoenosis of monospecific Foraminifera with Mayncina termieri, Pseudopfenderina or Lituosepta compressa are common, interpreted as allochthonous, resulting from sorting in an intertidal environment higher than supratidal, under or alternated with the supratidal laminations and the storm breccias, as well in rarer cases covering (aeolian origin?) surface of the supratidal coastal plain.[33] The Aganane Foraminifera in Terms "D" and "E" underwent significant evolutionary and environmental changes.[37] During D, the foraminiferal population was dominated by Planisepta, a smaller morphovariant of Lituosepta, which persisted after the decline of larger orbitopsellids like Orbitopsella due to internal biological factors and mechanical instability related to their large size. The population remained stable until the Middle Domerian anoxic crisis, which triggered a microfaunal turnover. E saw the emergence of smaller, simpler foraminifera such as Haurania gracilis and Paleocyclammina liasica, adapted to eutrophic lagoon conditions.[37]

Genus Species Stratigraphic position Material Notes Images
Amijiella[38]
  • A. amiji
  • Aït-Abbès
  • Jbel Tarkeddid
  • Tizi Isli
  • Tizi Nehassa
  • Wazzant
Isolated Tests/Shells A foraminifer of the family Hauraniidae
Ammobaculites[5]
  • A. sp.
  • Tizi Nehassa
Isolated Tests/Shells A foraminifer of the Ammomarginulininae family.
Dentalina[31]
  • D. sp.
  • Ait Athmane
Isolated Tests/Shells A foraminifer of the Nodosariinae family.
Eariandia[10]
  • E. sp.
  • Aït-Abbès
Isolated Tests/Shells A foraminifer of the family Earlandiidae.
Eggerella[12]
  • E. sp.
  • Tazoult
Isolated Tests/Shells A foraminifer of the Eggerellidae family.

Everticyclammina[12][39][40][41]

  • E. praevirguliana
  • E. sp.
  • Aganane/Assist
  • Ait Athmane
  • Barda
  • Bernai
  • Jbel Choucht
  • Tazoult
Isolated Tests/Shells

A foraminifer of the Everticyclamminidae family.

Glomospira[10][40]
  • G. sp.
  • Aït-Abbès
  • Ait Athmane
  • Assif Oum
  • Tizi Isli
  • Tizi Nehassa
Isolated Tests/Shells A foraminifer of the family Ammodiscidae.
Glomospirella[40]
  • G. sp
  • Ait Athmane
Isolated Tests/Shells A foraminifer of the family Ammovertellininae.
Haurania[10][12][37]
  • H. gracilis
  • H. deserta
  • Aït-Abbès
  • Barda
  • Jbel Choucht
  • Jbel Tarkeddid
  • Tazoult
  • Tizi Isli
  • Tizi Nehassa
  • Wazzant
Isolated Tests/Shells A foraminifer of the family Hauraniidae

Lituosepta[38][39]

  • L. recoarensis
  • L. compressa
  • Aganane
  • Aît Bou Guemez
  • Aït Blal
  • Assif Oum
  • Assist Bernai
  • Assist Lakhdar
  • Chaaba Touila
  • Gorges de Taghia
  • Gorges du Tisakht
  • Jbel Asmir
  • Jbel Choucht
  • Jbel Rhat
  • Jbel Tarahalt
  • Jbel Tarkeddid
  • Moulay Yacoub
  • Nit Blal-Tacht
  • Tadghouit
  • Wazzant
Isolated Tests/Shells

A foraminifer of the Mesoendothyridae family.

Meandrospira[12]
  • M. sp.
  • Barda
  • Jbel Choucht
  • Talmest-Tazoult
Isolated Tests/Shells A foraminifer of the Cornuspiridae family.

Mesoendothyra[10][12][39][40]

  • M. croatica
  • M. sp.
  • Aganane
  • Aït-Abbès
  • Aït Blal
  • Ait Athmane
  • Assist Bernai
  • Jbel Choucht
  • Tazoult
  • Wazzant
Isolated Tests/Shells

A foraminifer of the Mesoendothyridae family.

Nodosaria[40]
  • N. sexcostata
  • N. sp.
  • Ait Athmane
Isolated Tests/Shells A foraminifer of the family Nodosariinae.
Ophtalmidium[40]
  • O. concentricum
  • O. martanum
  • O. sp.
  • Ait Athmane
  • Tizi Nehassa
Isolated Tests/Shells A foraminifer of the family Ophthalmidiidae.

Orbitopsella[10][38][39]

  • O. primaeva
  • O. praecursor
  • Aganane
  • Aït Blal
  • Alt Bou Guemez
  • Assif Bernal
  • Assif Lakhdar
  • Assif Imejdag
  • Col d'Adoumaz
  • Col du R'nim
  • Col (Tizi) n-Toudat
  • Gorges du Makin
  • Gorges de Taghia
  • Jbel Choucht
  • Jbel Mahan
  • Jbel Rhat
  • Taclghouit
  • Jbel Tadaghas
  • Jbel Tafenfent
  • Jbel Tarkeddid
  • Wazzant
Isolated Tests/Shells

A foraminifer of the Mesoendothyridae family.

Paleomayncina[12][38][39]

  • P. termieri
  • Aganane
  • Aït Blal
  • Assist Bernai
  • Barda
  • Gorges du Tisakht
  • Jbel Choucht
  • Jbel Rhat
  • Jbel Tarahalt
  • Jbel Tarkeddid
  • Tazoult
  • Wazzant
Isolated Tests/Shells A foraminifer of the Mesoendothyridae family.
Planisepta[40][38]
  • P. compressa
  • Ait Athmane
Isolated Tests/Shells A foraminifer of the Mesoendothyridae family.
Planiinvoluta[12]
  • P. carinata
  • Barda
Isolated Tests/Shells A foraminifer of the Cornuspiridae family.

Pseudocyclammina[12][37][39]

  • P. liasica
  • Aït Blal
  • Barda
  • Jbel Choucht
  • Jbel Tarkeddid
  • Tazoult
  • Tizi Isli
  • Tizi Nehassa
  • Wazzant
Isolated Tests/Shells

A foraminifer of the Pfenderinidae family.

Pseudopfenderina[10][38][39]

  • P. butterlini
  • Aganane
  • Aït-Abbès
  • Aït Blal
  • Assist Bernai
  • Gorges du Tisakht
  • Jbel Choucht
  • Jbel Rhat
  • Jbel Tarahalt
  • Jbel Tarkeddid
  • Wazzant
Isolated Tests/Shells

A foraminifer of the Pfenderinidae family.

Siphovalvulina[10][38][39][40]

  • S. colomi
  • S. gibraltarensis
  • S. sp.
  • Aganane
  • Ait Athmane
  • Aït-Abbès
  • Aït Blal
  • Ait Athmane
  • Assist Bernai
  • Tizi Isli
  • Wazzant
Isolated Tests/Shells

A foraminifer of the Pfenderinidae family.

Invertebrates

[edit]

Ichnofossils

[edit]
Genus Species Location Material Made by Images

Arenicolites[33][39]

  • A. ispp.
  • Aganane
  • Aït-Abbès
  • Ait Athmane
  • Aït Blal
  • Aït Bou Guemez
  • Amagour
  • Assif Bernal
  • Assif Lakhdar
  • Assif Imejdag
  • Col d'Adoumaz
  • Col du R'nim
  • Col (Tizi) n-Toudat
  • Gorges du Makin
  • Gorges de Taghia
  • Jbel Choucht
  • Jbel Ikis
  • Jbel Mahan
  • Jbel Rhat
  • Jbel Taabest
  • Taclghouit
  • Jbel Tadaghas
  • Jbel Tafenfent
  • Jbel Tarkeddid
  • Taberhout
  • Tazergount
  • Tizi Nehassa
  • Wazzant

Borrowing Traces

Example of Arenicolites specimens
Asterosoma[42]
  • A. ispp.
Bulb-like swelling burrows

Chomatichnus[33][39]

  • C. wegberensis

Tubular Fodinichnia

Chondrites[33][39]

  • C. ispp.

Tubular Fodinichnia

Example of Chondrites trace fossil
Cruziana[42]
  • C. ispp.
Ribbon-like furrows
Example of Cruziana trace
Gastrochaenolites[42]
  • G. ispp.
clavate-shaped to flask-shaped tubes
  • Bivalves
Example of Gastrochaenolites
Glossifungites[42]
  • G. ispp.
Infilled abandoned burrows
Ophiomorpha[42]
  • O. irregulaire
  • O. nodosa
  • O. ispp.
Tubular Fodinichnia
  • Decapodans
Example of Ophiomorpha trace fossil

Rhizocorallium[33][39]

  • R. parallelum
  • R. ispp.

Tubular Fodinichnia

  • Crustaceans
  • Annelids
  • Bony Fish
Example of Rhizocorallium specimens
.

Skolithos[33][39]

  • S. ispp.

Cylindrical to subcylindrical burrows

Representation of Skolithos along the possible makers
.

Thalassinoides[33][39]

  • T. suevicus
  • T. ispp.

Tubular Fodinichnia

Example of Thalassinoides specimens
.
Teichichnus[42]
  • T. ispp.
Vertical to oblique burrows

Zoophycos[33][39]

  • Z. ispp.

Dwelling traces

Example of Zoophycos fossil

Hydrozoa

[edit]
Genus Species Stratigraphic position Material Notes Images
Spongiomorpha[18]
  • S. (Heptastylopsis) sp.
  • Aganane
  • Jbel Azourki
  • Tizi n'Tizint
Imprints A hydrozoan, member of the family Spongiomorphidae

Anthozoa

[edit]
Genus Species Stratigraphic Position Material Notes Images
Actinastreidae[30] Indeterminate
  • Ait Athmane
Colonial Imprints Thamnasterioid corals
Actinaraea, example of Actinastreid

Ampakabastraea[20]

  • A. sp.
  • Ait Athmane
Imprints

A solitary coral of the family Stylinidae.

Archaeosmilia[20][30]

  • A. beata
  • A. sp.
  • Ait Athmane
Imprints

A solitary coral of the family Zardinophyllidae.

Archaeosmiliopsis[20]

  • A. sp.
  • Ait Athmane
Colonial Imprints

A coral of the family Archaeosmiliidae.

Eocomoseris[30]
  • E. sp.
  • Ait Athmane
Colonial Imprints A thamnasterioid coral of the family Archaeosmiliidae.
Icaunhelia[30]
  • I. sp.
  • Ait Athmane
Imprints A solitary coral of the family Archaeosmiliidae

Oppelismilia[19][24]

  • O. sp.
  • Assemsouk
Imprints

A coral of the family Oppelismiliidae.

Paleomillepora[30]
  • P. sp.
  • Ait Athmane
Colonial Imprints A plocoid coral of the family Spongiocoenia

Phacelostylophyllum[19][24]

  • P. sp.
  • Assemsouk
Colonial Imprints

A coral of the family Stylophyllidae.

Phacelophyllia[19]

  • P. sp.
  • Ait Athmane
Colonial Imprints

A coral of the family Dermosmiliidae.

Periseris[19]

  • P. sp.
  • Ait Athmane
Colonial Imprints

A coral of the family Latomeandridae.

Proleptophyllia?[30]
  • P?. sp.
  • Ait Athmane
Imprints A solitary coral of the family Dermosmiliidae
Reimaniphyllidae[30] Indeterminate
  • Ait Athmane
Imprints Solitary corals

Retiophyllia[20][43]

  • R. zizensis
  • R. spp.
  • Ait Athmane
Colonial Imprints

A coral of the family Reimaniphylliidae. It belongs to the otherwise common Triassic genus Retiophyllia.

Stylophyllidae[30] Indeterminate
  • Ait Athmane
Colonial Imprints Phaceloid corals
Thecosmilia, example of Stylophyllid

Thamnasteria[20][43]

  • T. cf. mettensis
  • Ait Athmane
Colonial Imprints

A thamnasterioid coral of the family Thamnasteriidae.

Thamnasteria specimens

Porifera

[edit]
Genus Species Stratigraphic position Material Notes Images
Caunopora[18]
  • C. spp.
  • Aganane
  • Jbel Azourki
  • Tizi n'Tizint
Imprints Incertade Sedis, maybe a symbiotic Coral-Sponge, and likely Stromatoporoidea

Cladocoropsis[33][44]

  • C. mirabilis
  • C. spp.
  • Aganane
  • Aït-Abbès
  • Aït Blal
  • Jbel Tarkeddid
  • Wazzant

Colonial Imprints

An Axinellidan demosponge of the family Cladocoropsidae.

Extant relative, Axinella
Stylothalamia[45]
  • S. columnaris
  • Ain Kahla to Ain Leuh
Imprints A Dictyoceratidan demosponge of the family Verticillitidae

Brachiopoda

[edit]
Genus Species Stratigraphic position Material Notes Images
Aulacothyris[35]
  • A. resupinata
  • A. sp.
  • Boumia
  • Mudeli-Milhadène
  • Dades Gorges
Isolated Shells A Brachiopodan of the family Zeilleriidae

Calcirhynchia[35][46]

  • C. moghrabiensis
  • C. spp.
  • Boumia
  • Mudeli-Milhadène
  • Tizi n’Talrhemt

Isolated Shells

A Brachiopodan of the family Cirpinae. It was originally identified as part of the genus Rhynchonella

Gibbirhynchia[5][47]
  • G. ageri
  • G amalthei
  • G. northamptonensis
  • Tizi Nehassa
  • Dades Gorges
Isolated Shells A Brachiopodan member of the family Tetrarhynchiidae
Grandirhynchia[48]
  • G (Rhynchonella) laevigata
  • Tillouguit
Isolated Shells A Brachiopodan member of the family Tetrarhynchiidae

Hesperithyris[16][46][48][49]

  • H. atlantis
  • H. ifranensis
  • H. termieri
  • H. renierii[35]
  • H. cf. sinuosa[35]
  • Azrou[50]
  • Boumia
  • Col du Tarhzeft
  • Jebel Hebri
  • Mudeli-Milhadène
  • Tazergount
  • Tazioualt
  • Tizi Nehassa

Isolated Shells

A Brachiopodan of the family Zeilleriidae

Liospiriferina[5][47]
  • L. praerostrata
  • Tizi Nehassa
Isolated Shells A Brachiopodan of the family Spiriferinidae
Liospiriferina specimens
Lobothyris[47][51]
  • L. punctata
  • L. subpunctata
  • Tizi Nehassa
  • Tizi n'Tizint
Isolated Shells A Brachiopodan of the family Lobothyrididae
Lobothyris specimen (from Spain)
Parathyridina[47][51]
  • P. mediterranea
  • Tizi Nehassa
Isolated Shells A Brachiopodan of the family Zeilleriidae. A taxon living on the inner carbonate platforms rarely communicating with the open sea.

Spiriferina[46][48]

  • S. falloti
  • S. moeschi[35]
  • S. alpina[35]
  • S. rostrata[35]
  • S. tumida
  • S. obtusa
  • S. sp.
  • Boumia
  • Mudeli-Milhadène
  • S d'Ouaouizarthe
  • Tillouguit
  • Tizi n'Tizint

Isolated Shells

A Brachiopodan of the family Spiriferinidae

Sulcirostra[51]
  • S. brusinai
  • Bab-el-Hari
Isolated Shells A Brachiopodan of the family Dimerellidae
Tetrarhynchia[51]
  • T. tounatensis
  • T. ageri
  • Jebel Hebri
  • Tizi Nehassa
  • Tounat-el-Mariz
Isolated Shells A Brachiopodan member of the family Tetrarhynchiidae
"Terebratula"[18][51]
  • "T." hebbriensis
  • "T." spp.
  • Jebel Hebri
  • Tounat-el-Mariz
  • Dades Valley
Isolated Shells A Brachiopodan member of the family Terebratulidae
Terebratula specimens
Zeilleria[12][51]
  • Z. undulata
  • Z. sarthacensis
  • Z. guerangeri
  • Z. ssp.
  • Barda
  • Tizi Nehassa
  • Tizi n'Tizint
  • Zawyat Ahançal
Isolated Shells A Brachiopodan of the family Zeilleriidae
Zeilleria specimens (from Spain)

Bivalves

[edit]
Genus Species Stratigraphic position Material Notes Images

Arcomytilus[19][24]

  • A. furcatus
  • Assemsouk
  • Tazioualt

Isolated Shells

A saltwater bivalve of the family Mytilidae.

Cochlearites[10][19][20][24][52]

  • C. loppianus
  • C. spp.
  • Aganane
  • Aghbalou N'Kerdous[21]
  • Aït-Abbès
  • Aït Blal
  • Ait Athmane
  • Assemsouk
  • Assist Bernai
  • Gorges du Tisakht
  • Jbel Choucht
  • Jbel Rhat
  • Jbel Tarahalt
  • Jbel Tarkeddid
  • Tizi Nehassa
  • Tizi n'Tizint

Isolated Shells

A saltwater bivalve of the family Plicatostylidae. Its accumulations generally cover megalodontid coquinas.

Cochlearites

Eomiodon[19][24]

  • E. serradensis
  • E. spp.
  • Aganane
  • Aït Blal
  • Aït-Abbès
  • Ait Athmane
  • Assemsouk
  • Jbel Tarkeddid

Isolated Shells

A saltwater/brackish bivalve of the family Neomiodontidae. This genus is considered an opportunistic suspension feeder of shallow infauna, and the marker genus for brackish environments.[53]

Fimbria[19][24]

  • F. trulla
  • F. spp.
  • Assemsouk
  • Tizi n'Tizint

Isolated Shells

A saltwater bivalve of the family Lucinidae.

Example of extant specimen

Gervilleia[16][18]

  • G. termieri
  • G. spp.
  • Tazergount

Isolated Shells

A saltwater bivalve of the family Bakevelliidae.

Gervilleioperna[19][24]

  • G. atlanta
  • G. termierii
  • G. spp.
  • Ait Athmane
  • Assemsouk
  • Boumia
  • Mudeli-Milhadène
  • Tizi Nehassa

Isolated Shells

A saltwater bivalve of the family Plicatostylidae.

Gervillioperna
Gryphaea[20][31]
  • G. (Bilobissa) sp.
  • Ait Athmane
Isolated Shells A saltwater/brackish bivalve of the family Gryphaeidae
Specimen of the genus

Liogryphaea[19][24][31]

  • L. arcuata
  • L. spp.
  • Ait Athmane
  • Assemsouk

Isolated Shells

A saltwater bivalve of the family Gryphaeidae. This genus develops a noted material oyster biostrome at Aït Athmane, where a discontinuous, patchy layer is formed, developed under submarine lithification and a relative enrichment in terrigenous matter.[31]

Specimens of the genus

Lithioperna[12][19][20][52]

  • L. scutata
  • L. spp.
  • Aganane
  • Aghbalou N'Kerdous[21]
  • Aït-Abbès
  • Aït Blal
  • Ait Athmane
  • Assemsouk
  • Assist Bernai
  • Barda
  • Gorges du Tisakht
  • Jbel Choucht
  • Jbel Rhat
  • Jbel Tarahalt
  • Jbel Tarkeddid
  • Tazoult
  • Tizi Isli[5]
  • Tizi Nehassa
  • Tizi n'Tizint

Isolated Shells

A saltwater bivalve of the family Plicatostylidae. This genus was founded to be a bivalve with a juvenile byssate stage that developed different lifestyles in adulthood depending on the density of individuals and the firmness of the bottom.

Lithioperna

Lucina[18][19][24]

  • L. spp.
  • Assemsouk
  • Tizi n'Tizint

Isolated Shells

A saltwater/brackish bivalve of the family Lucinidae. Linked with intertidal settings

Specimen of the genus
Megalodon?[24]
  • M.? sp.
  • Assemsouk
Isolated Shells A saltwater bivalve of the family Megalodontidae
Specimens of the genus
Modiolus[18]
  • M. tirolensis
  • M. cf. hillana
  • Ait Athmane
Isolated Shells A saltwater bivalve of the family Mytilidae
Example of extant specimen
Nanogyra[20][31]
  • N. sp.
  • Ait Athmane
Isolated Shells A saltwater/brackish bivalve of the family Gryphaeidae

Opisoma[12][19][20][31][52]

  • O. menchikoffi
  • O. excavatum
  • O. bourcarti[35]
  • O. spp.
  • Ait Athmane
  • Aghbalou N'Kerdous[21]
  • Assemsouk
  • Barda
  • Bou Dahar
  • Chaaba Touila
  • Grand Pic de l'Ouarsenis
  • Jbel Choucht
  • Tazoult
  • Tizi Nehassa
  • Tizi n'Tizint

Isolated Shells

A saltwater/brackish bivalve of the family Astartidae. Is considered a genus that evolved from shallow burrowing ancestors, secondarily becoming an edge-lying semi-fauna adapted to photosymbiosis.[54]

Pachygervillia[55]

  • P. anguillaensis
  • Aganane
  • Aghbalou N'Kerdous[21]
  • Aït-Abbès
  • Aït Blal
  • Ait Athmane
  • Assemsouk
  • Jbel Tarkeddid

Isolated Shells

A saltwater bivalve of the family Plicatostylidae.

Pachygervillia

Pachyrisma[19][31][52]

  • P. crassa
  • P. opimun
  • P. spp.
  • Aganane
  • Aghbalou N'Kerdous[21]
  • Aït Blal
  • Ait Athmane
  • Assemsouk
  • Assist Bernai
  • Gorges du Tisakht
  • Jbel Choucht
  • Jbel Rhat
  • Jbel Tarahalt
  • Jbel Tarkeddid

Isolated Shells

A saltwater bivalve of the family Pachyrismatidae

Pecten[19][24][31]

  • P. juhanus
  • P. dieulefait[35]
  • P. spp.
  • Ait Athmane
  • Assemsouk
  • Boumia
  • Dades Gorges
  • Mudeli-Milhadène
  • Tizi n'Tizint

Isolated Shells

A saltwater bivalve of the family Pectinidae

Example of extant specimen
"Perna"[18]
  • "P". spp.
  • Tizi n'Tizint
Isolated shells A saltwater bivalve of the family Pteriidae
Perna specimens
Phacoides[18]
  • P. spp.
  • Ait Toumerte
Isolated shells A saltwater/brackish bivalve of the family Lucinidae.
Specimens of the genus

Pholadomya[18][19][24]

  • P. scutata
  • P. voltzi
  • Assemsouk
  • Dades Gorges

Isolated Shells

A saltwater bivalve of the family Pholadomyidae

Specimens of the genus
Plagiostoma[20][31]
  • P. gigantea
  • Ait Athmane
Isolated Shells A saltwater/brackish bivalve of the family Limidae
Specimens of P. gigantea

Protodiceras[19][31][52]

  • P. pumilum
  • P. spp.
  • Aganane
  • Aghbalou N'Kerdous[21]
  • Aït Blal
  • Ait Athmane
  • Assemsouk
  • Assist Bernai
  • Gorges du Tisakht
  • Jbel Asmir
  • Jbel Choucht
  • Jbel Rhat
  • Jbel Tarahalt
  • Jbel Tarkeddid

Isolated Shells

A saltwater bivalve of the family Pachyrismatidae

Pseudopachymytilus[20]
  • P. sp.
  • Aghbalou N'Kerdous[21]
  • Ait Athmane
Isolated Shells A saltwater bivalve of the family Myalinidae.

Gastropoda

[edit]
Genus Species Stratigraphic position Material Notes Images
Boehmia[18]
  • B. speciosa
  • Dades Valley
Isolated shells A saltwater gastropod of the family Acteonidae
Cerithiella[18]
  • C. africana
  • Tizi n'Tizint
Isolated shells A saltwater gastropod of the family Newtoniellidae
Cerithiella specimen
Ceritella[47]
  • C. (Fibula) spp.
  • Tizi Nehassa
Isolated Shells A saltwater gastropod of the family Ceritellidae
Coelostylina[18]
  • C. chartroni
  • Jbel Tarkeddid
Isolated shells A saltwater gastropod of the family Coelostylinidae
Encyclomphalus[18]
  • E. spp.
  • Tizi n'Tizint
Isolated Shells A saltwater gastropod of the family Pleurotomariidae
Fibulella[18]
  • F. nicolai
  • F. (Fibula?) afra
  • Tizi n'Tizint
Isolated shells A saltwater gastropod of the family Ceritellidae

Nerinea[16][19][24]

  • N. spp.
  • Aganane
  • Aït-Abbès
  • Aït Blal
  • Ait Athmane
  • Assemsouk
  • Tazergount
  • Jbel Tarkeddid

Isolated Shells

A saltwater gastropod of the family Nerineidae.

Specimen of the genus
Neritina[18]
  • N. spp.
  • Tizi n'Tizint
Isolated shells A saltwater gastropod of the family Neritidae
Specimen of the genus
Procerithium[18]
  • P. canescens
  • P. spp.
  • Aganane
  • Aït-Abbès
  • Jbel Azourki
  • Tazergount
  • Tizi n'Tizint
Isolated Shells A saltwater gastropod of the family Procerithiidae
Pseudomelania[18]
  • P. (Oonia) marucchiensis
  • Tizi n'Tizint
Isolated shells A saltwater gastropod of the family Pseudomelaniidae

Pseudonerinea[10][16]

  • P. terebra
  • P. spp.
  • Aït-Abbès
  • Tazergount

Isolated Shells

A saltwater gastropod of the family Nerineidae

Scurriopsis[19][24]

  • S. (Scurria?) parma
  • S. spp.
  • Assemsouk

Isolated Shells

A saltwater gastropod of the family Nerineidae.

Specimens of the genus

Ammonites

[edit]
Genus Species Stratigraphic position Material Notes Images

Arieticeras[8]

  • A. ceratitoïdes
  • A. cf. algovianum
  • Aït Blal
  • Aït-Abbès

Isolated Shells

An ammonite of the family Hildoceratidae. Arieticeras cf. algovianum is indicative of the Middle Domerian (Upper Pliensbachian) in the upper zone

Example of Arieticeras specimens

Fontanelliceras[8]

  • F. sp.
  • Zawyat Ahançal

Isolated Shells

An ammonite of the family Hildoceratidae

Fuciniceras[8]
  • F. confungens
  • F. lavinianum
  • F. ambiguum
  • F. cf.cornacaldense
  • F. sp.
  • Aït-Haceïne
  • Almou-n'Tarzekt
  • S d'Ouaouizarthe
Isolated Shells An ammonite of the family Hildoceratidae
Galaticeras[8]
  • G. aegoceroides
  • S d'Ouaouizarthe
Isolated Shells An ammonite of the family Lytoceratidae
Lioceratoides[8]
  • L. sp.
  • Tillouguit
Isolated Shells An ammonite of the family Hildoceratidae
Protogrammoceras[8]
  • P. contrarium
  • P. marianii
  • P. (Argutarpites) praeexeratus
  • P. (Argutarpites) pectinatus
  • Aït-Haceïne
  • S d'Ouaouizarthe
  • Tillouguit
Isolated Shells An ammonite of the family Hildoceratidae

Proamaltheus[8]

  • P. sp.
  • Moulay Yacoub

Isolated Shells

An ammonite of the family Amaltheinae

Example of Proamaltheus (Amaltheus) specimen
Reynesoceras[8]
  • R. ragazzonii
  • Aït-Haceïne
Isolated Shells An ammonite of the family Dactylioceratidae

Annelida

[edit]
Genus Species Stratigraphic position Material Habitat Notes Images

Serpulidae[33]

Indeterminate

  • Aganane
  • Aït-Abbès
  • Aït Blal
  • Ait Athmane
  • Assemsouk
  • Assist Bernai
  • Gorges du Tisakht
  • Jbel Choucht
  • Jbel Rhat
  • Jbel Tarahalt
  • Jbel Tarkeddid
Isolated or accumulated tubes

Marine or Lagoonal

A sessile Annelid of the family Serpulidae.

Example of modern Serpulid Tube

Decapoda

[edit]
Genus Species Stratigraphic position Material Notes Images
Favreina[10][33]
  • F. salevensis
  • F. spp.
  • Aganane
  • Aït-Abbès
  • Ait Athmane
  • Aït Blal
  • Assemsouk
  • Jbel Tarkeddid
Coprolites Decapodan fossil coprolites, assigned to the ichnofamily Favreinidae. Referred to Axiidea-like burrowing crustaceans
Extant Axiidean

Parafavreina[10][33]

  • P. thoronetensis
  • P. spp.
  • Aganane
  • Aït-Abbès
  • Ait Athmane
  • Aït Blal
  • Assemsouk
  • Jbel Tarkeddid

Coprolites

Echinodermata

[edit]
Genus Species Stratigraphic position Material Notes Images
Atlasaster[35]
  • A. termieri
  • Boumia
  • Mudeli-Milhadène
Isolated Individuals An echinoid, member of the group Irregularia
Firmacidaris[18]
  • F. ssp.
  • Tizi n'Tizint
  • Zawyat Ahançal
Isolated Individuals An echinoid, Incertade Sedis
Pentacrinites[18]
  • P. ssp.
  • Aganane
  • Jbel Azourki
  • Tizi n'Tizint
  • Zawyat Ahançal
Columnals A Crinoid of the family Pentacrinidae
Reconstruction
Pseudocidaris[18]
  • P. ssp.
  • Tizi n'Tizint
  • Zawyat Ahançal
Isolated Individuals An echinoid, member of the family Hemicidaridae
Reconstruction

Dinosauria

[edit]

Theropoda

[edit]
Genus Species Stratigraphic position Material Notes Images

Carmelopodus?[56][57][58]

  • C?. isp.
  • Ibaqualliwn
  • Tabant

Footprints

Incertae sedis within Neotheropoda, maybe ceratosaur tracks. Includes some large tracks.[59][58]

The footprints of Carmelopodus belong to a genus with a pes similar to Ceratosaurus, yet does not implicate is a member of the family or a relative

"Carnosauria"[56][57]

Indeterminate
  • Ait Bou Oulli
  • Assif-n-Sremt
  • Ibaqualliwn
  • Talsnant
  • Tabant
  • Tizi Asdremt
  • Tizi-n-Aït Imi

Footprints

incertae sedis within Theropoda. 64 footprints of medium to large (30–55 cm) theropods referred as "Morphotype 3", some with resemblance to Allosauroid pes (Megalosauripus? ispp.).[59]

The footprints of Megalosauripus belong to a genus with a pes similar to Allosaurus, yet does not implicate is a member of the family or a relative

Coelurosaurichnus[1][56][57][60]

  • Aït Blal

Footprints

Member of the ichnofamily Grallatoridae, incertae sedis within Theropoda. Up to 96 tracks of small theropods, referred originally to "Morphotype 1", and usually attributed to dinosaurs similar to Coelophysidae and Dilophosaurus. Includes didactyl, tridactyl and tetradactyl tracks, as well as pathologic trackways with evidence of limping.[1] Has been suggested to be tracks from tridactyl taxa under different conditions.[61]

An example of Coelurosaurichnus (Grallator) track

Eubrontes[56][62]

  • E. isp.
  • Cf.E. isp.
  • Aït Blal
  • Akourbi
  • Iskatafene
  • Ansous
  • Ibaqualliwn
  • Issil-n-Aït Arbi[63]
  • Tabant
  • Taouddaat[64]
  • Tizi-n-Aït Imi
  • Waougoulzat
  • Wanechki

Footprints

Type member of the ichnofamily Eubrontidae, incertae sedis inside Theropoda. Eubrontes is usually related to the genus Dilophosaurus, representing basal Neotheropods. The local record includes up to 208 tracks, referred as "Morphotype 2".[56]

An example of Eubrontes track

Theropoda[1][56][60]

Indeterminate
  • Akourbi
  • Aït Blal
  • Ansous[65]
  • Arhbalou n'Kerdous[66]
  • Ibaqualliwn
  • Iba Ziz
  • Issil-n-Aït Arbi[63]
  • Tabant
  • Taouddaat[66][64]
  • Sidi Moussa
  • Waougoulzat

Footprints

Incertae sedis.

Sauropodomorpha

[edit]

Several tracks, classified under a "Morphotype 3", were originally attributed to Thyreophoran (Stegosaur?) dinosaurs, even recently suggested to come from the ichnogenera Deltapodus?, Luluichnus? and Tetrapodosaurus?.[65][67] It must be noted that this tracks are badly preserved and unusually large for an armoured dinosaur of early jurassic age (some up to 60 cm), and so likely are misidentified Sauropodomorph tracks.[58]

Genus Species Stratigraphic position Material Notes Images

Breviparopus[56][68]

  • B. isp.
  • Ahbak

Footprints

Incertae sedis within Sauropoda. Includes traces with pes similar to Diplodocoidea, but also others that resemble basal sauropods.[68][69]

Breviparopus are referred to taxa like Haplocanthosaurus, yet it doesn't mean they were made by it

Liujianpus[56][58][70]

  • Assif-n-Sremt
  • Ibaqualliwn
  • Tabant

Footprints

Incertae sedis within Sauropodomorpha. Described as the "Morphotype 1" Includes traces with pes similar to those of basal quadrupedal forms like Blikanasaurus or Melanorosauridae.[69] Referred to quadrupedal taxa such as Gongxianosaurus.[58] Alternatively, the tracks, or some of them, can belong to the ichnogenus Lavinipes.[71]

Otozoum[58][63][72][73]

  • O. moodii
  • O. isp.
  • Ibaqualliwn
  • Issil-n-Aït Arbi
  • Timit

Footprints

Type member of the ichnofamily Otozoidae, incertae sedis within Sauropodomorpha. Cuadrupedal or semibipedal, includes a gigantic 84 or 75 cm track that represents the largest Otozoum ever described in the literature.[72][73]

The local Footprints of Otozoum may have belonged to a genus similar to that of Lamplughsaura

Parabrontopodus[63][68]

  • P. ispp.
  • Aff.P. isp.
  • Aguer-n-Ouzrou
  • Aguerd
  • Ansous
  • Ibaqualliwn
  • Tabant
  • Tigharguenine
  • Tizi-n-Aït
  • Waougoulzat

Footprints

Typical member of the ichnofamily Parabrontopodidae, incertae sedis within Sauropoda. Includes tracks with pes similar to those of Vulcanodon, Rhoetosaurus, Barapasaurus or Eusauropoda.[69] Tracks referred to the stegosaurian ichnogenus Deltapodus? locally are actually of sauropod origin, likely "Parabrontopodid", probably a new ichnogenus.[58][65]

The Footprints of Parabrontopodus may have belonged to a genus similar to that of Vulcanodon

Pseudotetrasauropus[63]

  • P. isp.
  • Issil-n-Aït Arbi

Footprints

Incertae sedis within Sauropodomorpha. Referred to semibipedal sauropodomorphs, like Kholumolumo.[74]

The prints of Pseudotetrasauropus may have belonged to a genus similar to that of Wudingloong

Sauropodomorpha[63][60]

Indeterminate
  • Aguer-n-Ouzrou
  • Assif-n-Sremt
  • Jbel Azourki
  • Ibaqualliwn
  • Iba'ziz
  • Issil-n-Aït Arbi
  • Tabant
  • Tizi-n-Aït
  • Tigharguenine
  • Timit

Footprints

Incertae sedis.

Sauropoda[56][57]

Indeterminate
  • Ahbak
  • Ait Waggown
  • Ansous
  • Tizi-n-Aït
  • Tabant
  • Timit
  • Iba'ziz
  • Taouddaat[64]
  • Tigharguenine
  • Waougoulzat

Footprints

Incertae sedis.

Ornithischia

[edit]
Genus Species Stratigraphic position Material Notes Images

Moyenisauropus[75]

  • M. isp.
  • Taouddaat

Footprints

Incertae sedis within Thyreophora. While the tracks can resemble Iguanodon-alike pes, biomorphic-morphometric characters can only be associated with thyreophorans, what would support the bipedalism theory for this taxa.[75]

The Footprints of Moyenisauropus may have belonged to a genus similar to that of Scelidosaurus.

Rhodophyta

[edit]
Genus Species Stratigraphic position Material Notes Images
Permocalculus[12]
  • P. sp.
  • Barda
  • Jbel Choucht
  • Tazoult
Calcareous Imprints A Red alga of the Gymnocodiaceae family.
Pycnoporidium[10]
  • P. sp.
  • Aït-Abbès
Calcareous Imprints A Red Alga of the family Solenoporaceae
Example of modern crustose coralline algae, an equivalent of extinct Solenopores
Solenopora[16][76]
  • S. liasica
  • S. spp.
  • Aganane
  • Aït Blal
  • Assist Bernai
  • Gorges du Tisakht
  • Jbel Choucht
  • Jbel Rhat
  • Jbel Tarahalt
  • Jbel Tarkeddid
  • Wazzant
Calcareous Imprints A Red Alga of the family Solenoporaceae

Viridiplantae

[edit]
Genus Species Stratigraphic position Material Notes Images
Acicularia[12]
  • A. sp.
  • Jbel Choucht
Calcareous Imprints A Green alga of the Dasycladaceae family.
Agathoxylon[18]
  • A. ("Dadoxylon") sp.
  • Tizi n'Tizint
Fossil Wood Conifer Wood of the family Araucariaceae
Extant Araucarian Woods
Boueina[12][33][76]
  • B. hochstetteri
  • B. spp.
  • Aganane
  • Aït Blal
  • Assist Bernai
  • Barda
  • Gorges du Tisakht
  • Jbel Choucht
  • Jbel Rhat
  • Jbel Tarahalt
  • Jbel Tarkeddid
  • Tazoult
  • Wazzant
Calcareous Imprints A Green alga of the Halimedaceae or Udoteaceae family.
Example of Modern Udotea
Cayeuxia[39][76]
  • C. liasica
  • C. spp.
  • Aganane
  • Aït Blal
  • Assif Oum
  • Assist Bernai
  • Chaaba Touila
  • Gorges du Tisakht
  • Jbel Choucht
  • Jbel Rhat
  • Jbel Tarahalt
  • Jbel Tarkeddid
  • Tizi Nehassa
  • Wazzant
Calcareous Imprints A Green alga of the Halimedaceae or Udoteaceae family.
Classopollis[77]
  • C. quezelii
  • C. yvesi
  • LM494, Demnate
Pollen Conifer Pollen, type of the family Hirmeriellaceae
Cupressacites[77]
  • C. oxycedroides
  • LM494, Demnate
Pollen Conifer Pollen of the family Cupressaceae(?)
Local Cupressaceous(?) pollen may have come from a taxon similar to extant Taxodium
Cylindroporella[12]
  • C. sp.
  • Tazoult
Calcareous Imprints A Green alga of the Dasycladaceae family.
Diadocupressacites[77]
  • D. moghrebiensis
  • LM494, Demnate
Pollen Conifer Pollen of the family Cupressaceae(?)
Fanesella[31]
  • F. dolomitica
  • Ait Athmane
Calcareous Imprints A Green alga of the Dasycladaceae family.
Paleodasycladus[12][39][76]
  • P. elongatus
  • P. fragilis
  • P. mediterraneus
  • P. anae
  • P. spp.
  • Aganane
  • Aït Blal
  • Ait Athmane
  • Assemsouk
  • Assif Oum
  • Assist Bernai
  • Chaaba Touila
  • Gorges du Tisakht
  • Jbel Asmir
  • Jbel Choucht
  • Jbel Rhat
  • Jbel Tarahalt
  • Jbel Tarkeddid
  • Ibaqualliwn
  • Tazoult
  • Wazzant
Calcareous Imprints A Green alga of the Dasycladaceae family.
Palaeocladus mediterraneus specimens
Pseudolithocodium[33]
  • P. sp.
  • Aganane
  • Aït Blal
  • Assist Bernai
  • Gorges du Tisakht
  • Jbel Choucht
  • Jbel Rhat
  • Jbel Tarahalt
  • Jbel Tarkeddid
  • Wazzant
Calcareous Imprints A Green alga, likely a member of the Ulotrichales group.
Sestrosphera[39][76]
  • S. liasina
  • Aganane
  • Aït Blal
  • Assist Bernai
  • Gorges du Tisakht
  • Jbel Choucht
  • Jbel Rhat
  • Jbel Tarahalt
  • Jbel Tarkeddid
  • Wazzant
Calcareous Imprints A Green alga of the Triploporellaceae family.
Terquemella[5]
  • T. spp.
  • Tizi Isli
Calcareous Imprints A Green alga of the Bornetellaceae family.
Thaumatoporella[12][39][76]
  • T. parvovesiculifera
  • T. spp.
  • Aganane
  • Aït Blal
  • Assist Bernai
  • Barda
  • Gorges du Tisakht
  • Jbel Choucht
  • Jbel Rhat
  • Jbel Tarahalt
  • Jbel Tarkeddid
  • Tizi Isli[5]
  • Tizi Nehassa
  • Tazoult
  • Wazzant
Calcareous Imprints A Green alga of the Thaumatoporellales group
[edit]

See also

[edit]

References

[edit]
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