Elrhaz Formation

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Elrhaz Formation
Stratigraphic range: Aptian-Albian
File:Gadoufaoua.png
Outcrops of the formation
Type Geological formation
Unit of Tegama Group
Underlies Echkar Formation
Overlies Tazolé Formation
Location
Country  Niger

The Elrhaz Formation is a geological formation in Niger, central Africa.

Its strata date back to the Early Cretaceous (late Aptian-early Albian stages, about 112 million years ago). Dinosaur remains are among the fossils that have been recovered from the formation.

Vertebrate paleofauna

Crocodyliformes

crocodyliforms reported from the Elrhaz Formation
Genus Species Location Stratigraphic position Material Notes Images

Araripesuchus[1]

A. wegeneri[1]

"nearly complete skull" - Sereno & Larsson (1999)

Anatosuchus[1]

A. minor[1]

"nearly complete skull" - Sereno & Larsson (1999)

Ornithischians

Ornithischians reported from the Elrhaz Formation
Genus Species Location Stratigraphic position Material Notes Images

Lurdusaurus[1]

L. arenatus[1]

"Partial skull, fragmentary postcranial skeleton."[2]
Ouranosaurus

Ouranosaurus[1]

O. nigeriensis[1]

"Skull and poscrania, second skeleton."[3]

Elrhazosaurus[1]

E. nigeriensis[1]

"Femora."[4]

Saurischians

Saurischians reported from the Elrhaz Formation
Genus Species Location Stratigraphic position Material Notes Images

Eocarcharia[1]

E. dinops[5]

"Partial skull and postcranial remains."[6]

 Carcharodontosaurid
File:Suchomimus2.jpg
Suchomimus

Elaphrosaurus[1]

E. iguidensis[1]

Nigersaurus[1]

N. taqueti[1]

 Sauropod

Suchomimus[1]

S. tenerensis[1]

Partial skull and associated skeleton.[7]

 A second, possible spinosaurid found in the formation, Cristatusaurus, is considered either a separate species or a synonym to Suchomimus[8]

Kryptops[1]

K. Palaios[1]

Postcranial skeleton and partial skull.[9]

 Abelisaurid

See also

Footnotes

  1. ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 1.13 1.14 1.15 1.16 1.17 1.18 "68.1 Departement D'Agedez, Niger; 1. Elrhaz Formation," in Weishampel, et al. (2004). Page 572.
  2. ↑ "Table 19.1," in Weishampel, et al. (2004). Page 416.
  3. ↑ "Table 19.1," in Weishampel, et al. (2004). Page 417.
  4. ↑ "Table 19.1," in Weishampel, et al. (2004). Page 415.
  5. ↑ Sereno, Paul C.; and Brusatte, Stephen L. (2008). "Basal abelisaurid and carcharodontosaurid theropods from the Lower Cretaceous Elrhaz Formation of Niger" (pdf). Acta Palaeontologica Polonica 53 (1): 15–46. doi:10.4202/app.2008.0102.
  6. ↑ "Table 4.1," in Weishampel, et al. (2004). Page 73.
  7. ↑ "Table 4.1," in Weishampel, et al. (2004). Page 72.
  8. ↑ Rauhut, O.W.M. (2003). "The interrelationships and evolution of basal theropod dinosaurs". Special Papers in Palaeontology 69: 1-213.
  9. ↑ "Table 4.1," in Weishampel, et al. (2008). Page 72.

References

  • Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. 861 pp. ISBN 0-520-24209-2.


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