Tamaguélelt Formation
| Tamaguélelt Formation | |
|---|---|
| Stratigraphic range: Early Eocene (Ypresian) ~ | |
| Type | Geological formation |
| Underlies | Continental Terminal Formation |
| Overlies | Teberemt Formation |
| Lithology | |
| Primary | Phosphorite |
| Location | |
| Coordinates | 17°36′N 0°18′E / 17.6°N 0.3°E |
| Approximate paleocoordinates | 10°54′N 4°24′W / 10.9°N 4.4°W |
| Region | Er Rachidia |
| Country | Mali |
   Tamaguélelt 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.[1][2]
Fossil content
Color key
| Notes Uncertain or tentative taxa are in small text; |
Reptiles
Squamata
| Squamates from the Tamaguélelt Formation | |||||
|---|---|---|---|---|---|
| Genus | Species | Material | Notes | Member | Images |
| Palaeophis | P. colossaeus[1] | Vertebrae | A giant palaeophiid marine snake |  | |
| Serpentes | Serpentes indet.[3] | ||||
Crocodylomorpha
| Crocodylomorphs from the Tamaguélelt Formation | |||||
|---|---|---|---|---|---|
| Genus | Species | Material | Notes | Member | Images |
| Tilemsisuchus | T. lavocati [4] | A dyrosaurid crocodylomorph | |||
| Phosphatosaurus | P. gavialoides[3] | A dyrosaurid crocodylomorph. | |||
Ray-finned fish
| Ray-finned fish from the Tamaguélelt Formation | |||||
|---|---|---|---|---|---|
| Genus | Species | Material | Notes | Member | Images |
| Brychaetus | B. sp.[4] | A marine bonytongue. |  | ||
| Claroteidae | Claroteidae indet.[2][4] | A freshwater claroteid catfish. | |||
| Cylindracanthus | C. sp. | A marine actinopterygian of uncertain affinities. |  | ||
| Maliamia | M. gigas[4] | A large marine vidalamiine amiid. | |||
| Nigerium | N. tamaguelense[2] | A freshwater claroteid catfish. | |||
| Pycnodus | P. zeaformis[5] | A marine pycnodont. |  | ||
| P. maliensis[5] | |||||
| P. sp[5] | |||||
| Stratodus | S. apicalis [4] | A giant marine dercetid aulopiform. |  | ||
Lobe-finned fish
| Lungfish from the Tamaguélelt Formation | |||||
|---|---|---|---|---|---|
| Genus | Species | Material | Notes | Member | Images |
| Lavocatodus | L. giganteus[5] | 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[4][6] | ||||
| Numidotheriidae | Numidotheriidae indet. [4] | ||||
| Plesielephantiformes | Plesielephantiformes indet. [4] | ||||
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.[4] | ||||
| Gastrochaenolites | G. sp. [4] | ||||
Cephalopoda
| Cephalopods from the Tamaguélelt Formation | |||||
|---|---|---|---|---|---|
| Genus | Species | Material | Notes | Member | Images |
| Cimomia | C. ogbei | A hercoglossid nautiloid. |
| ||
References
- ^ a b "PBDB Collection". paleobiodb.org. Retrieved 2025-01-08.
- ^ a b c 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.
- ^ a b "PBDB Collection". paleobiodb.org. Retrieved 2025-01-09.
- ^ a b c d e f g h i j "PBDB Collection". paleobiodb.org. Retrieved 2025-01-09.
- ^ a b c d Agassiz, Louis (1833). Recherches sur les poissons fossiles ... Neuchatel: Petitpierre.
- ^ Illiger, Johann Karl Wilhelm (1811). Caroli Illigeri ... Prodromus systematis mammalium et avium additis terminis zoographicis utriusque classis, eorumque versione germanica. Berolini [Berlin]: sumptibus C. Salfeld.