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Emarginachelys

Description

Emarginachelys cretacea is a turtle belonging to the group Cryptodira, known from well preserved fossils from the Maastrichtian stage of the Late Cretaceous of Montana. Its exact phylogenetic position within Cryptodira is uncertain; different authors considered it to be either the earliest described chelydrid or a fossil relative of kinosternoids.


Source Data
SourceIDLink
Global Biodiversity Information Facility ID (GBIF)4577836https://www.gbif.org/species/4577836
PaleoBioDB ID (PBDB)37709https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=37709
Rankgenus
Taxonomy (GBIF)Life : Animalia : Chordata : Reptilia : Testudines : Chelydridae : Emarginachelys
Taxonomy (PBDB)Life : Animalia : Chordata : Reptilia : Testudines : Emarginachelys
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
-Testudinata
orderTestudinesBatsch 1788
suborderCryptodiraCope 1868
-Chelydroidea
-PankinosternoideaJoyce et al. 2004
genusEmarginachelysWhetstone 1978
Scientific NameEmarginachelys Whetstone, 1978
Name Published InUniversity Kans. Sci. Bull. 51 (17)
Opinions (PBDB)
NameRankOpinionEvidenceAuthor
Emarginachelysgenusbelongs to Chelydridaestated with evidenceWhetstone, 1978
Emarginachelysgenusbelongs to ChelydridaeimpliedCarroll, 1988
Emarginachelysgenusbelongs to Chelydridaestated without evidenceHolroyd and Hutchison, 2002
Emarginachelysgenusbelongs to Durocryptodirastated with evidenceDanilov and Parham, 2008
Emarginachelysgenusbelongs to Chelydridaestated with evidenceKnauss et al., 2011
Emarginachelysgenusbelongs to Pankinosternoideastated with evidenceJoyce and Bourque, 2016
Status (PBDB)extinct
Taxon Size (PBDB)2
First Recorded Appearance72.1 - 66.0 Ma
Late/Upper Cretaceous
Last Recorded Appearance70.6 - 66.0 Ma
Late/Upper Cretaceous
Environmentfreshwater (based on Cryptodira)
Motilityactively mobile (based on Osteichthyes)
Dietomnivore (based on Cryptodira)
Reproductionoviparous (based on Cryptodira)
Taphonomyphosphatic (based on Vertebrata)
Primary Reference (PBDB)K. N. Whetstone. 1978. A new genus of cryptodiran turtles (Testudinoidea, Chelydridae) from the Upper Cretaceous Hell Creek Formation of Montana. Univeristy of Kansas Science Bulletin 51(17):539-563
Wikipediahttps://en.wikipedia.org/wiki/Emarginachelys

Fossil Distribution

Subtaxa

NameStatusCommon Name(s)Fossil OccurrencesOldestYoungest
Emarginachelys cretacea
species
accepted (GBIF)
listed (PBDB)
472.1 Ma
Late/Upper Cretaceous
70.6 Ma
Late/Upper Cretaceous

Obsolete Names

NameSourceTaxon RankTaxonomy
Emarginochelys Whetstone, 1978GBIFgenusAnimalia : Chordata : Reptilia : Testudines : Chelydridae : Emarginochelys

Synonymy List

YearName and Author
1978Emarginachelys Whetstone p. 544 figs. 5-19
1988Emarginachelys Carroll
1989Emarginochelys Bryant p. 37
2002Emarginochelys Holroyd and Hutchison
2008Emarginachelys Danilov and Parham
2011Emarginachelys Knauss et al.
2016Emarginachelys Joyce and Bourque

References

Whetstone K. N. (1978) A new genus of cryptodiran turtles (Testudinoidea, Chelydridae) from the Upper Cretaceous Hell Creek Formation of Montana, Univeristy of Kansas Science Bulletin 51 17, 539-563
Carroll R. L. (1988) , Vertebrate Paleontology and Evolution, 1-698
Bryant L. J. (1989) Non-dinosaurian lower vertebrates across the Cretaceous-Tertiary boundary in northeastern Montana, University of California Publications in Geological Sciences 134, 1-107
Holroyd P. A., Hutchison J. H. (2002) Patterns of geographic variation in latest Cretaceous vertebrates: evidence from the turtle component, Geological Society of America Special Paper 361, 177-190
Danilov I. G., Parham J. F. (2008) A reassessment of some poorly known turtles from the Middle Jurassic of China, with comments on the antiquity of extant turtles, Journal of Vertebrate Paleontology 28 2, 306-318
Knauss G. E., Joyce W. G., et al (2011) A new kinosternoid from the Late Cretaceous Hell Creek Formation of North Dakota and Montana and the origin of the Dermatemys mawii lineage, Palaeontologische Zeitschrift 85, 125-142 doi:10.1007/s12542-010-0081-x
Joyce W. G., Bourque J. R. (2016) A Review of the Fossil Record of Turtles of the Clade Pan-Kinosternoidea, Bulletin of the Peabody Museum of Natural History 57 1, 57-95
GBIF/Paleo Database - via The Interim Register of Marine and Nonmarine Genera
Nomenclator Zoologicus. A list of the names of genera and subgenera in zoology from the tenth edition of Linnaeus, 1758 to the end of 2004. Digitised by uBio from vols. 1-9 of Neave (ed.), 1939-1996 plus supplementary digital-only volume. http://ubio.org/NomenclatorZoologicus (as at 2006). - via The Interim Register of Marine and Nonmarine Genera
University Kans. Sci. Bull. 51 (17) - via The Interim Register of Marine and Nonmarine Genera
as per family - via The Interim Register of Marine and Nonmarine Genera
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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