Echkar Formation

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Echkar Formation
Stratigraphic range: Late Albian-Cenomanian
~100–95  Ma
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O
S
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Type Geological formation
Unit of Tegama Group
Underlies Farak Formation
Overlies Elrhaz Formation
Lithology
Primary Sandstone
Other Claystone
Location
Coordinates 17°54′N5°36′E / 17.9°N 5.6°E / 17.9; 5.6
Approximate paleocoordinates 2°48′N0°24′E / 2.8°N 0.4°E / 2.8; 0.4
Region Agadez Region
Country Niger
Extent Iullemmeden Basin
Type section
Named forEchkar, Aderbissinat
Niger relief location map.jpg
Green pog.svg
Echkar Formation (Niger)

The Echkar Formation is a geological formation comprising sandstones and claystones in the Agadez Region of Niger, central Africa.

Contents

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. [1]

Fossil content

[2]

Vertebrates

Fish

Fish of the Echkar Formation
GenusSpeciesMaterialNotesImages
Ceratodus C. sp. Ceratodus.jpg
Lepidotes L. sp. 2015 museum Le Havre Lepidotes.jpg
Onchopristis O. numida Onchopristis numidus 052013.JPG
Platyspondylus P. foureaui

Dinosaurs

Color key
Taxon Reclassified taxonTaxon falsely reported as presentDubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon
Notes
Uncertain or tentative taxa are in small text; crossed out taxa are discredited.

Ornithischians

Ornithischians of the Echkar Formation
GenusSpeciesMaterialNotesImages
?Stegosauria indet.No genus given. May not actually belong to Stegosauria.

Sauropods

Sauropods of the Echkar Formation
GenusSpeciesMaterialNotesImages
Aegyptosaurus A. baharijensis Aegyptosaurus LM.png
Rebbachisaurus R. tamesnensis
R. sp.[ citation needed ]		 Rebbachisaurus BW.jpg

Theropods

Theropods of the Echkar Formation
GenusSpeciesMaterialNotesImages
Bahariasaurus B. ingens Bahariasaurus ingens, like megaraptora.jpg
Carcharodontosaurus [3] C. iguidensis [4]
Carcharodontosaurus.png
Elaphrosaurus E. iguidiensis (=Theropoda indet.)Likely an indeterminate theropod. Elaphrosaurus.jpg
Inosaurus I. tedreftensis
Rugops R. primus
Rugops (cropped).png
Spinosaurus S. sp. [4] Teeth
Spinosaurus aegyptiacus.png

Reptiles

Color key
Taxon Reclassified taxonTaxon falsely reported as presentDubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon
Notes
Uncertain or tentative taxa are in small text; crossed out taxa are discredited.
Reptiles of the Echkar Formation
GenusSpeciesMaterialNotesImages
Araripesuchus A. rattoides
Araripesuchus patagonicus SEND.jpg
Elosuchus E. sp. Elosuchus BW.jpg
Fortignathus F. felixi
Kaprosuchus K. saharicus
Kaprosuchus NT.jpg
Laganosuchus L. thaumastos
Laganosuchus thaumastos.jpg
Testudines indet.No genus given.

See also

References

  1. ↑ 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.
  2. ↑ In Abangarit-Tamesna at Fossilworks.org
  3. ↑ 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.
  4. 1 2 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

Further reading

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