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Tamaguélelt Formation

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Geological formation in Mali
Tamaguélelt Formation
Stratigraphic range: Early Eocene (Ypresian)
~56–47.8 Ma PreꞒ Ꞓ O S D C P T J K Pg N
TypeGeological formation
UnderliesContinental Terminal Formation
OverliesTeberemt Formation
Lithology
PrimaryPhosphorite
Location
Coordinates17°36′N 0°18′E / 17.6°N 0.3°E / 17.6; 0.3
Approximate paleocoordinates10°54′N 4°24′W / 10.9°N 4.4°W / 10.9; -4.4
RegionEr Rachidia
Country Mali,
Tamaguélelt Formation is located in MaliTamaguélelt FormationTamaguélelt FormationTamaguélelt FormationTamaguélelt FormationTamaguélelt FormationTamaguélelt Formation (Mali)

The Tamaguélelt Formation is an Early Eocene-aged geological formation in Mali. It comprises phosphorite sediments deposited within the Trans-Saharan seaway. Many of the preserved fossils of the formation indicate that it was a marginal marine habitat. In addition to these marine fossils, fossils of freshwater and terrestrial animals are also common in the formation, due to a vast freshwater network that regularly deposited fossils into the seaway.

Fossil content

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.

Reptiles

Squamata

Squamates from the Tamaguélelt Formation
Genus Species Material Notes Member Images
Palaeophis P. colossaeus Vertebrae A giant palaeophiid marine snake
Serpentes Serpentes indet.

Crocodylomorpha

Crocodylomorphs from the Tamaguélelt Formation
Genus Species Material Notes Member Images
Tilemsisuchus T. lavocati A dyrosaurid crocodylomorph
Phosphatosaurus P. gavialoides A dyrosaurid crocodylomorph.

Ray-finned fish

Ray-finned fish from the Tamaguélelt Formation
Genus Species Material Notes Member Images
Brychaetus B. sp. A marine bonytongue.
Claroteidae Claroteidae indet. A freshwater claroteid catfish.
Cylindracanthus C. sp. A marine actinopterygian of uncertain affinities.
Maliamia M. gigas A large marine vidalamiine amiid.
Nigerium N. tamaguelense A freshwater claroteid catfish.
Pycnodus P. zeaformis A marine pycnodont.
P. maliensis
P. sp
Stratodus S. apicalis A giant marine dercetid aulopiform.

Lobe-finned fish

Lungfish from the Tamaguélelt Formation
Genus Species Material Notes Member Images
Lavocatodus L. giganteus A freshwater lavocatodid lungfish
Protopterus P. elongus A freshwater protopterid lungfish

Mammals

Proboscidea

Proboscideans from the Tamaguélelt Formation
Genus Species Material Notes Member Images
Probscidea Probscidea indet
Numidotheriidae Numidotheriidae indet.
Plesielephantiformes Plesielephantiformes indet.

Hyracoidea

Hyraxes from the Tamaguélelt Formation
Genus Species Material Notes Member Images
Pliohyracidae Pliohyracidae indet.

Mollusca

Bivalvia

Bivalves from the Tamaguélelt Formation
Genus Species Material Notes Member Images
Pholadidae Pholadidae indet.
Gastrochaenolites G. sp.

Cephalopoda

Cephalopods from the Tamaguélelt Formation
Genus Species Material Notes Member Images
Cimomia C. ogbei A hercoglossid nautiloid.

Cimonia

References

  1. ^ "PBDB Collection". paleobiodb.org. Retrieved 2025-01-08.
  2. ^ O'leary, Maureen A.; Bouaré, Mamadou L.; Claeson, Kerin M.; Heilbronn, Kelly; Hill, Robert V.; Mccartney, Jacob; Sessa, Jocelyn A.; Sissoko, Famory; Tapanila, Leif; Wheeler, Elisabeth; Roberts, Eric M. (2019-06-28). "Stratigraphy and Paleobiology of the Upper Cretaceous-Lower Paleogene Sediments from the Trans-Saharan Seaway in Mali". Bulletin of the American Museum of Natural History. 2019 (436): 1. doi:10.1206/0003-0090.436.1.1. ISSN 0003-0090.
  3. ^ "PBDB Collection". paleobiodb.org. Retrieved 2025-01-09.
  4. ^ "PBDB Collection". paleobiodb.org. Retrieved 2025-01-09.
  5. ^ Agassiz, Louis (1833). Recherches sur les poissons fossiles ... Neuchatel: Petitpierre.
  6. Illiger, Johann Karl Wilhelm (1811). Caroli Illigeri ... Prodromus systematis mammalium et avium additis terminis zoographicis utriusque classis, eorumque versione germanica. Berolini : sumptibus C. Salfeld.
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