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Rhabdognathus keiniensis

Description

Rhabdognathus is an extinct genus of dyrosaurid crocodylomorph. It is known from rocks dating to the Paleocene epoch from western Africa, and specimens dating back to the Maastrichtian era were identified in 2008. It was named by Swinton in 1930 for a lower jaw fragment from Nigeria. The type species is Rhabdognathus rarus. Stéphane Jouve subsequently assessed R. rarus as indeterminate at the species level, but not at the genus level, and thus dubious. Two skulls which were assigned to the genus Rhabdognathus but which could not be shown to be identical to R. rarus were given new species: R. aslerensis and R. keiniensis, both from Mali. The genus formerly contained the species Rhabdognathus compressus, which was reassigned to Congosaurus compressus after analysis of the lower jaw of a specimen found that it was more similar to that of the species Congosaurus bequaerti. Rhabdognathus is believed to be the closest relative to the extinct Atlantosuchus.


Source Data
SourceIDLink
Global Biodiversity Information Facility ID (GBIF)8447048https://www.gbif.org/species/8447048
PaleoBioDB ID (PBDB)195085https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=195085
Rankspecies
Taxonomy (GBIF)Life : Animalia : Chordata : Reptilia : Crocodylia : Dyrosauridae : Rhabdognathus : Rhabdognathus keiniensis
Taxonomy (PBDB)Life : Animalia : Chordata : Reptilia : Eosuchia : Dyrosauridae : Rhabdognathus : Rhabdognathus keiniensis
Taxonomic Status (GBIF)accepted
Classification
(PBDB,GBIF)
RankNameAuthor
-Eukaryota
-OpisthokontaCavalier-Smith 1987
kingdomAnimalia
-TriploblasticaLankester 1877
-NephrozoaJondelius et al. 2002
-DeuterostomiaGrobben 1908
phylumChordataHaeckel 1847
subphylumVertebrataLamarck 1801
superclassGnathostomataGegenbauer 1874
-Osteichthyes
-SarcopterygiiRomer 1955
subclassDipnotetrapodomorpha
subclassTetrapodomorpha
-Tetrapoda
-ReptiliomorphaSäve-Söderbergh 1934
-AnthracosauriaSäve-Söderbergh 1934
-Batrachosauria
-Cotylosauria
-AmniotaHaeckel 1866
-SauropsidaHuxley 1864
classReptiliaLaurenti 1768
subclassEureptilia
-RomeriidaGauthier et al. 1988
-Diapsida
-Eosuchia
-NeodiapsidaBenton 1985
-SauriaGauthier 1984
-Archosauromorpha
-CrocopodaEzcurra 2016
-ArchosauriformesGauthier 1986
-EucrocopodaEzcurra 2016
-Archosauria
-Pseudosuchia
-SuchiaKrebs 1974
-ParacrocodylomorphaParrish 1993
-Loricata
-Crocodylomorpha
suborderCrocodyliformesHay 1930
-MesoeucrocodyliaWhetstone and Whybrow 1983
-NeosuchiaClark 1988
-Coelognathosuchia
-Tethysuchia
-TethysuchoideaSouza et al. 2019
-Dyrosauridae
genusRhabdognathusSwinton 1930
speciesRhabdognathus keiniensisJouve 2007
Generic NameRhabdognathus
Scientific NameRhabdognathus keiniensis Jouve, 2007
Opinions (PBDB)
NameRankOpinionEvidenceAuthor
Rhabdognathus keiniensisspeciesbelongs to Rhabdognathusstated with evidenceJouve, 2007
Status (PBDB)extinct
Taxon Size (PBDB)1
First Recorded Appearance72.1 - 66.0 Ma
Late/Upper Cretaceous
Last Recorded Appearance66.0 - 56.0 Ma
Paleocene
Environmentmarine (based on Mesoeucrocodylia)
Motilityactively mobile (based on Osteichthyes)
Dietcarnivore (based on Pseudosuchia)
Taphonomyphosphatic (based on Vertebrata)
Primary Reference (PBDB)S. Jouve. 2007. Taxonomic revision of the Dyrosaurid Assemblage (Crocodyliformes: Mesoeucrocodylia) from the Paleocene of the Iullemmeden Basin, West Africa. Journal of Paleontology 81(1):163-175
Wikipediahttps://en.wikipedia.org/wiki/Rhabdognathus_keiniensis

Fossil Distribution

Synonymy List

YearName and Author
2007Rhabdognathus keiniensis Jouve
2012Rhabdognathus keiniensis Bronzati et al.

References

Jouve S. (2007) Taxonomic revision of the Dyrosaurid Assemblage (Crocodyliformes: Mesoeucrocodylia) from the Paleocene of the Iullemmeden Basin, West Africa, Journal of Paleontology 81 1, 163-175
Bronzati M., Montefeltro F. C., et al (2012) A species-level supertree of Crocodyliformes, Historical Biology 24 6, 598-606
Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!
 
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