Chroniosuchidae

Chroniosuchidae Temporal range: Upper Permian–Upper Triassic PreЄ Є O S D C P T J K Pg N
Chroniosuchus
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Order:	†Chroniosuchia
Family:	†Chroniosuchidae Vjuschkov, 1957
Genera
Chroniosaurus Chroniosuchus Ingentidens[1] Jarilinus[2] Madygenerpeton[3] Phratochronis[1] Uralerpeton[4] Suchonica[5]

The Chroniosuchidae are a family of semi-aquatic reptiliomorph amphibians found in sediments from the upper Permian and the upper Triassic periods, most in Russia. They were generally rather large animals, with long jaws similar to those found in modern crocodiles, and probably lived a similar life style as riverside piscivores and ambush predators. Like all Chroniosuchians, they bore extensive osteoderm armour on their backs, possibly as protection against terrestrial predators such as the Permian therapsids and the Triassic Rauisuchians.

Phylogeny

Chroniosaurus dongusensis

Uralerpeton tverdokhlebovae

Below is the cladogram from Buchwitz et al. (2012) showing the phylogenetic relations of chroniosuchids:^[6]

Chroniosuchia   Madygenerpeton   Chroniosaurus dongusensis   Chroniosaurus levis   Suchonica   Jarilinus   Chroniosuchus   Uralerpeton  Bystrowianidae  Synesuchus  Bystrowiella  Bystrowiana  Axitectum  Dromotectum

Chroniosuchidae

See also

• Permian tetrapods

References

1. Jin-Ling Li and Zheng-Wu Cheng (1999). "New Anthracosaur and Temnospondyl Amphibians from Gansu, China - The Fifth Report on Late Permian Dashankou Lower Tetrapod Fauna" (PDF). Vertebrata PalAsiatica. 37 (3): 234–247.
2. V. K. Golubev (1998). "Revision of the Late Permian Chroniosuchians (Amphibia, Anthracosauromorpha) from Eastern Europe" (PDF). Paleontological Journal. 32 (4): 390–401.
3. Rainer R. Schoch, Sebastian Voigt, Michael Buchwitz (2010). "A chroniosuchid from the Triassic of Kyrgyzstan and analysis of chroniosuchian relationships". Zoological Journal of the Linnean Society. 160 (3): 515–530. doi:10.1111/j.1096-3642.2009.00613.x.
4. V. K. Golubev (1998). "Narrow-armored Chroniosuchians (Amphibia, Anthracosauromorpha) from the Late Permian of Eastern Europe" (PDF). Paleontological Journal. 32 (3): 278–287.
5. V. K. Golubev (1999). "A New Narrow-Armored Chroniosuchian (Amphibia, Anthracosauromorpha) from the Upper Permian of Eastern Europe" (PDF). Paleontological Journal. 33 (2): 166–173.
6. Buchwitz, M.; Foth, C.; Kogan, I.; Voigt, S. (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. doi:10.1111/j.1475-4983.2012.01137.x.