Chroniosaurus

Chroniosaurus
Temporal range: 255 Ma Upper Permian
C. dongusensis
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Chordata
Clade: Reptiliomorpha (?)
Order: †Chroniosuchia
Family: †Chroniosuchidae
Genus: †Chroniosaurus
Tverdochlebova, 1972
Species
  • †C. dongusensis Tverdokhlebova, 1972 (type)
  • †C. levis Golubev, 1998
Restoration of C. dongusensis

Chroniosaurus is an extinct genus of chroniosuchid stegocephalian, often considered a reptiliomorph but possibly a stem-tetrapod, from upper Permian (upper Tatarian age) deposits of Novgorod, Orenburg and Vologda Regions, Russia. It was first named by Tverdokhlebova in 1972 and the type species is Chroniosaurus dongusensis.

Habitation

Its lifestyle is uncertain. An early study suggested a fairly aquatic lifestyle, but its femoral microanatomy and dorsal dermal plates suggest a rather terrestrial lifestyle.

References

  1. ↑ Buchwitz, Michael; Foth, Christian; Kogan, Ilja; Voigt, Sebastian (May 2012). "On the use of osteoderm features in a phylogenetic approach on the internal relationships of the Chroniosuchia (Tetrapoda: Reptiliomorpha)". Palaeontology. 55 (3): 623–640. Bibcode:2012Palgy..55..623B. doi:10.1111/j.1475-4983.2012.01137.x.
  2. ↑ Marjanović, David; Laurin, Michel (4 January 2019). "Phylogeny of Paleozoic limbed vertebrates reassessed through revision and expansion of the largest published relevant data matrix". PeerJ. 6 e5565. doi:10.7717/peerj.5565. ISSN 2167-8359. PMC 6322490. PMID 30631641.
  3. 1 2 V. K. Golubev (1998). "Revision of the Late Permian Chroniosuchians (Amphibia, Anthracosauromorpha) from Eastern Europe" (PDF). Paleontological Journal. 32 (4): 390–401.
  4. ↑ Golubev, V. K. (1998). "Narrow-armored chroniosuchians (Amphibia, Anthracosauromorpha) from the Late Permian of Eastern Europe". Paleontological Journal. 32: 278–287.
  5. ↑ Laurin, Michel; Girondot, Marc; Loth, Marie-Madeleine (December 2004). "The evolution of long bone microstructure and lifestyle in lissamphibians". Paleobiology. 30 (4): 589–613. Bibcode:2004Pbio...30..589L. doi:10.1666/0094-8373(2004)030<0589:TEOLBM>2.0.CO;2. ISSN 0094-8373.
  6. ↑ Buchwitz, Michael; Witzmann, Florian; Voigt, Sebastian; Golubev, Valeriy (July 2012). "Osteoderm microstructure indicates the presence of a crocodylian-like trunk bracing system in a group of armoured basal tetrapods". Acta Zoologica. 93 (3): 260–280. doi:10.1111/j.1463-6395.2011.00502.x.