Elrhaz Formation

Elrhaz Formation
Stratigraphic range: Aptian-Albian

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, alongside those of multiple species of crocodyliformes.

Vertebrate paleofauna

Crocodyliformes

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

Araripesuchus[1]

A. wegeneri[1]

"nearly complete skull" - Sereno & Larsson (1999)
The giant Crocodyliform Sarcosuchus

Anatosuchus[1]

A. minor[1]

"nearly complete skull" - Sereno & Larsson (1999)
Sarcosuchus[2] S. imperator "partial skeletons, numerous skulls"

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."[3]
Ouranosaurus

Ouranosaurus[1]

O. nigeriensis[1]

"Skull and poscrania, second skeleton."[4]

Elrhazosaurus[1]

E. nigeriensis[1]

"Femora."[5]

Saurischians

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

Eocarcharia[1]

E. dinops[6]

"Partial skull and postcranial remains."[7]

 Carcharodontosaurid
Suchomimus

Elaphrosaurus[1]

E. iguidensis[1]

 No longer assigned to Elaphrosaurus

Nigersaurus[1]

N. taqueti[1]

 Sauropod

Suchomimus[1]

S. tenerensis[1]

Partial skull and associated skeleton.[8]

 A second, possible spinosaurid found in the formation, Cristatusaurus, is considered either a separate species or a synonym to Suchomimus[9]

Kryptops[1]

K. Palaios[1]

Postcranial skeleton and partial skull.[10]

 Abelisaurid

See also

Footnotes

  1. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 "68.1 Departement D'Agedez, Niger; 1. Elrhaz Formation," in Weishampel, et al. (2004). Page 572.
  2. ↑ Sereno, P. C.; Larsson, H. C.; Sidor, C. A.; Gado, B. (2001-11-16). "The giant crocodyliform Sarcosuchus from the Cretaceous of Africa". Science (New York, N.Y.). 294 (5546): 1516–1519. doi:10.1126/science.1066521. ISSN 0036-8075. PMID 11679634.
  3. ↑ "Table 19.1," in Weishampel, et al. (2004). Page 416.
  4. ↑ "Table 19.1," in Weishampel, et al. (2004). Page 417.
  5. ↑ "Table 19.1," in Weishampel, et al. (2004). Page 415.
  6. ↑ 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.
  7. ↑ "Table 4.1," in Weishampel, et al. (2004). Page 73.
  8. ↑ "Table 4.1," in Weishampel, et al. (2004). Page 72.
  9. ↑ Rauhut, O.W.M. (2003). "The interrelationships and evolution of basal theropod dinosaurs". Special Papers in Palaeontology 69: 1-213.
  10. ↑ "Table 4.1," in Weishampel, et al. (2008). Page 72.

References


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