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Cryopterygius kristiansenae âśť

Description

Cryopterygius (meaning 'frozen fin' in Greek) is an extinct genus of ophthalmosaurid ichthyosaur known from the uppermost Jurassic of Central Spitsbergen, Norway. The type species, Cryopterygius kristiansenae , is known from a single, but largely complete specimen from the Slottsmøya Member of the Agardhfjellet Formation (middle Volgian/late Tithonian, Late Jurassic). With a total length of 5.0–5.5 metres (16.4–18.0 ft), it is a large ichthyosaur. A second species, C. kielanae, was found in the Kcynia Formation from the Late Jurassic of Poland. It is smaller than the type species, with a length of 3.5–4 metres (11–13 ft).


Source Data
SourceIDLink
Global Biodiversity Information Facility ID (GBIF)8439962https://www.gbif.org/species/8439962
PaleoBioDB ID (PBDB)248881https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=248881
Rankspecies
Taxonomy (GBIF)Life : Animalia : Chordata : Reptilia : Ophthalmosauridae : Cryopterygius : Cryopterygius kristiansenae
Taxonomy (PBDB)Life : Animalia : Chordata : Reptilia : Ichthyosauria : Ophthalmosauridae : Cryopterygius : Cryopterygius kristiansenae
Taxonomic Status (GBIF)doubtful
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
-IchthyosauromorphaMotani et al. 2015
-IchthyosauriformesMotani et al. 2015
-Ichthyopterygia
-EoichthyosauriaMotani 1999
-Ichthyosauria
-ParvipelviaMotani 1999
-NeoichthyosauriaSander 2000
-ThunnosauriaMotani 1999
-BaracromiaFischer et al. 2013
familyOphthalmosauridaeAppleby 1956
subfamilyOphthalmosaurinaeBaur 1887
genusCryopterygiusDruckenmiller et al. 2012
speciesCryopterygius kristiansenaeDruckenmiller Hurum Knutsen & Nakrem 2012
Generic NameCryopterygius
Scientific NameCryopterygius kristiansenae Druckenmiller, Hurum, Knutsen & Nakrem, 2012
Name Published InDruckenmiller, Patrick S., Jørn H. Hurum, Espen M. Knutsen & Hans A. Nakrem. 2012. Two new ophthalmosaurids (Reptilia: Ichthyosauria) from the Agardhfjellet Formation (Late Jurassic: Volgian/Tithonian), Svalbard, Norway. Norwegian Journal of Geology 92: 311–339.
Opinions (PBDB)
NameRankOpinionEvidenceAuthor
Cryopterygius kristiansenaespeciesbelongs to Cryopterygiusstated with evidenceDruckenmiller et al., 2012
Status (PBDB)extinct
Taxon Size (PBDB)1
First Recorded Appearance152 - 145 Ma
Late Jurassic
Last Recorded Appearance152 - 145 Ma
Late Jurassic
Environmentmarine (based on Ichthyosauria)
Motilityactively mobile (based on Ichthyosauria)
Dietcarnivore (based on Ichthyosauria)
Reproductionviviparous (based on Ichthyosauria)
Taphonomyhydroxylapatite (based on Ichthyosauria)
Primary Reference (PBDB)P. S. Druckenmiller, J. H. Hurum, and E. M. Knutsen, H. A. Nakrem. 2012. Two new ophthalmosaurids (Reptilia: Ichthyosauria) from the Agardhfjellet Formation (Upper Jurassic: Volgian/Tithonian), Svalbard, Norway. Norwegian Journal of Geology 92:311-339
Wikipediahttps://en.wikipedia.org/wiki/Cryopterygius_kristiansenae

Fossil Distribution

Synonymy List

YearName and Author
2012Cryopterygius kristiansenae Druckenmiller et al. p. 313 figs. 2-11
2014Cryopterygius kristiansenae Arkhangelsky and Zverkov
2016Cryopterygius kristiansenae Ji et al. p. 13
2019Undorosaurus kristiansenae Delsett et al.

References

Druckenmiller P. S., Hurum J. H., et al (2012) Two new ophthalmosaurids (Reptilia: Ichthyosauria) from the Agardhfjellet Formation (Upper Jurassic: Volgian/Tithonian), Svalbard, Norway, Norwegian Journal of Geology 92, 311-339
Arkhangelsky M. S., Zverkov N. G. (2014) On a new ichthyosaur of the genus Undurosaurus, Proceedings of the Zoological Institute RAS 318 5, 187-196
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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