Echkar Formation
The Echkar Formation is a geological formation comprising sandstones and claystones in the Agadez Region of Niger, central Africa.
Description
Its strata date back to the Late Albian to Late Cretaceous (Cenomanian stages, about 100-95 million years ago). Dinosaur remains are among the fossils that have been recovered from the formation.
Fossil content
Vertebrates
Fish
| Fish of the Echkar Formation | ||||
|---|---|---|---|---|
| Genus | Species | Material | Notes | Images |
| Ceratodus | C. sp. | 
| ||
| Lepidotes | L. sp. | 
| ||
| Onchopristis | O. numida | 
| ||
| Platyspondylus | P. foureaui | |||
Dinosaurs
Color key
|
Notes Uncertain or tentative taxa are in small text; |
Ornithischians
| Ornithischians of the Echkar Formation | ||||
|---|---|---|---|---|
| Genus | Species | Material | Notes | Images |
| ?Stegosauria indet. | No genus given. May not actually belong to Stegosauria. | |||
Sauropods
| Sauropods of the Echkar Formation | ||||
|---|---|---|---|---|
| Genus | Species | Material | Notes | Images |
| Aegyptosaurus | A. baharijensis | 
| ||
| Rebbachisaurus | R. tamesnensis R. sp. |
| ||
Theropods
| Theropods of the Echkar Formation | ||||
|---|---|---|---|---|
| Genus | Species | Material | Notes | Images |
| Bahariasaurus | B. ingens | 
| ||
| Carcharodontosaurus | C. iguidensis C. saharicus |
 | ||
| Elaphrosaurus | E. iguidiensis (=Theropoda indet.) | Likely an indeterminate theropod. | 
| |
| Inosaurus | I. tedreftensis | |||
| Rugops | R. primus | .png) | ||
| Spinosaurus | S. aegyptiacus |  | ||
Reptiles
Color key
|
Notes Uncertain or tentative taxa are in small text; |
| Reptiles of the Echkar Formation | ||||
|---|---|---|---|---|
| Genus | Species | Material | Notes | Images |
| Araripesuchus | A. rattoides |  | ||
| Elosuchus | E. sp. | 
| ||
| Fortignathus | F. felixi | |||
| Kaprosuchus | K. saharicus |  | ||
| Laganosuchus | L. thaumastos |  | ||
| Testudines indet. | No genus given. | |||
See also
- List of dinosaur-bearing rock formations
- Lists of fossiliferous stratigraphic units in Africa
- Geology of Niger
References
- ^ Weishampel, David B; et al. (2004). "Dinosaur distribution (Early Cretaceous, Africa)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 571-573. ISBN 0-520-24209-2.
- ^ In Abangarit-Tamesna at Fossilworks.org
- ^ Brusatte, S. and Sereno, P.C. (2005). "A new species of Carcharodontosaurus (Dinosauria: Theropoda) from the Cenomanian of Niger and its implications for allosauroid phylogeny." Journal of Vertebrate Paleontology, 25: 40A.
- ^ Brusatte, S.L. and Sereno, P.C. (2007). "A new species of Carcharodontosaurus (dinosauria: theropoda) from the Cenomanian of Niger and a revision of the genus." Journal of Vertebrate Paleontology, 27(4)
Bibliography
- Young, Mark T.; Hastings, Alexander K.; Allain, Ronan; Smith, Thomas J. (2017), "Revision of the enigmatic crocodyliform Elosuchus felixi de Lapparent de Broin, 2002 from the Lower–Upper Cretaceous boundary of Niger: potential evidence for an early origin of the clade Dyrosauridae", Zoological Journal of the Linnean Society, 179: 377–403
Further reading
- A. F. d. Lapparent. 1953. Gisements de Dinosauriens dans le "Continental intercalaire" d'In Abangarit (Sahara méridional) [Dinosaur localities in the "Continental Intercalaire" of In Abangarit (southern Sahara)]. Comptes Rendus de l'Académie des Sciences à Paris 236:1905-1906
- P. C. Sereno, J. A. Wilson, and J. L. Conrad. 2004. New dinosaurs link southern landmasses in the mid-Cretaceous. Proceedings of the Royal Society of London B 271(1546):1325-1330