Elrhaz Formation
Encyclopedia
The Elrhaz Formation is a geological formation in Niger whose 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.
Early Cretaceous
The Early Cretaceous or the Lower Cretaceous , is the earlier or lower of the two major divisions of the Cretaceous...
(late Aptian
Aptian
The Aptian is an age in the geologic timescale or a stage in the stratigraphic column. It is a subdivision of the Early or Lower Cretaceous epoch or series and encompasses the time from 125.0 ± 1.0 Ma to 112.0 ± 1.0 Ma , approximately...
-early Albian
Albian
The Albian is both an age of the geologic timescale and a stage in the stratigraphic column. It is the youngest or uppermost subdivision of the Early/Lower Cretaceous epoch/series. Its approximate time range is 112.0 ± 1.0 Ma to 99.6 ± 0.9 Ma...
stages, about 112 million years ago). Dinosaur remains are among the fossils that have been recovered from the formation.
Ornithischians
| Ornithischians reported from the Elrhaz Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
Lurdusaurus Lurdusaurus Lurdusaurus is a genus of large ornithopod dinosaur which lived in the Aptian stage of the Early Cretaceous, sometime between 121 to 112 million years ago.-Discovery and naming:... |
L. arenatus |
"Partial skull, fragmentary postcranial skeleton." |
 |
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Ouranosaurus Ouranosaurus Ouranosaurus is an unusual genus of herbivorous iguanodont dinosaur that lived during the early Cretaceous about 110 million years ago in what is now Africa. Ouranosaurus measured about seven to eight meters long... |
O. nigeriensis |
"Skull and poscrania, second skeleton." |
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Elrhazosaurus Elrhazosaurus Elrhazosaurus is a genus of basal iguanodontian dinosaur, known from isolated bones found in Lower Cretaceous rocks of Niger. These bones were initially thought to belong to a species of the related dryosaurid Valdosaurus, but have since been reclassified.-Discovery and history:Elrhazosaurus is... |
E. nigeriensis |
"Femora." |
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Saurischians
| Saurischians reported from the Elrhaz Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
Cristatusaurus Cristatusaurus Cristatusaurus is an extinct genus of spinosaurid theropod dinosaur. It lived during the Early Cretaceous Period of what is now Africa.... |
C. lapparenti |
"Partial skull and postcranial remains." |
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Elaphrosaurus Elaphrosaurus Elaphrosaurus is a genus of theropod dinosaur from the Kimmeridgian stage of the Late Jurassic of Tanzania. Elaphrosaurus was probably a ceratosaur about 6 meters long. Suggestions that it is a late surviving coelophysoid have been entertained but are generally dismissed. It was first... |
E. iguidensis |
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Nigersaurus Nigersaurus Nigersaurus is a genus of diplodocoid sauropod dinosaur from the middle Cretaceous period, about 119 to 99 million years ago during the Aptian or Albian age. This dinosaur was described by Paul Sereno and colleagues in 1999... |
N. taqueti |
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Suchomimus Suchomimus Suchomimus is a genus of large spinosaurid dinosaur with a crocodile-like mouth that lived sometime between 121-112 million years ago, during the late Aptian stage of the Cretaceous period in Africa.-Description:... |
S. tenerensis |
Partial skull and associated skeleton. |
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