Chroniosuchidae

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title: "Chroniosuchidae" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["chroniosuchia", "permian-tetrapods", "triassic-tetrapods", "prehistoric-tetrapod-families"] description: "Extinct family of tetrapodomorphs" topic_path: "general/chroniosuchia" source: "https://en.wikipedia.org/wiki/Chroniosuchidae" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Extinct family of tetrapodomorphs ::

| fossil_range = | image = Chroniosuchus BW.jpg | image_caption=Chroniosuchus | taxon = Chroniosuchidae | authority = Vjuschkov, 1957 | subdivision_ranks = Genera | subdivision =

• Chroniosaurus
• Chroniosuchus
• Ingentidens
• Jarilinus
• Madygenerpeton
• Phratochronis
• Uralerpeton
• Suchonica

Chroniosuchidae is a family of semi-aquatic tetrapods 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 lifestyle 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

::figure[src="https://upload.wikimedia.org/wikipedia/commons/4/48/Chroniosaurus_dong12DB.jpg" caption="Chroniosaurus dongusensis]]''"] ::

::figure[src="https://upload.wikimedia.org/wikipedia/commons/d/da/Uralerpeton2DB.jpg" caption="Uralerpeton tverdokhlebovae]]''"] ::

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

|cladogram= |label1=Chroniosuchia |1={{cladex |1=Madygenerpeton |barbegin1=black |2={{cladex |1=Chroniosaurus dongusensis |bar1=black |2={{cladex |1=Chroniosaurus levis |bar1=black |2={{cladex |1=Suchonica |bar1=black |2=Jarilinus |bar2=black |3=Chroniosuchus |bar3=black |4={{cladex |1=Uralerpeton |barend1=black |label2=Bystrowianidae |2={{cladex |1={{cladex |1=Synesuchus |2=Bystrowiella}} |2={{cladex |1=Bystrowiana |2={{cladex |1=Axitectum |2=Dromotectum

References

References

1. (1999). "New Anthracosaur and Temnospondyl Amphibians from Gansu, China - The Fifth Report on Late Permian Dashankou Lower Tetrapod Fauna". Vertebrata PalAsiatica.
2. V. K. Golubev. (1998). "Revision of the Late Permian Chroniosuchians (Amphibia, Anthracosauromorpha) from Eastern Europe". Paleontological Journal.
3. Rainer R. Schoch. (2010). "A chroniosuchid from the Triassic of Kyrgyzstan and analysis of chroniosuchian relationships". Zoological Journal of the Linnean Society.
4. V. K. Golubev. (1998). "Narrow-armored Chroniosuchians (Amphibia, Anthracosauromorpha) from the Late Permian of Eastern Europe". Paleontological Journal.
5. V. K. Golubev. (1999). "A New Narrow-Armored Chroniosuchian (Amphibia, Anthracosauromorpha) from the Upper Permian of Eastern Europe". Paleontological Journal.
6. Buchwitz, M.. (2012). "On the use of osteoderm features in a phylogenetic approach on the internal relationships of the Chroniosuchia (Tetrapoda: Reptiliomorpha)". Palaeontology.

::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::