Archaeosyodon

Archaeosyodon
Live artistic representation of Archaeosyodon
Temporal occurrence
Middle Perm
272.3 to 259.9 million years
Locations
Perm Region ( Russia )
Systematics
Synapsids (Synapsida) Therapsids (Therapsida) Dinocephalia Anteosauria Archaeosyodon
Scientific name
Archaeosyodon
Chudinov , 1960
Art
Archaeosyodon praeventor

Archaeosyodon is an extinct genus of synapsids from the group of Dinocephalia . Within the Dinocephalia it is assigned to the Anteosauria , a group of four-legged carnivores . Fossils are dated to the Middle Permian and come from the Perm region in Russia . The only species is Archaeosyodon praeventor .

Archaeosyodon is known for six fragmentary skulls and other isolated skull bones. All finds come from a single site in the Ocherskii district . The genus was scientifically described for the first time in 1960 by Pyotr Konstantinowitsch Tschudinow ; Another, more extensive description followed in 1983.

features

Archaeosyodon differs from other representatives of the Anteosauria in a number of primitive features, including extensive dentition of the palate. The snout was bulbous - a feature that is only found in Sinophoneus among other Anteosauria . Unique features are also found on the teeth; for example, the canines were short, wide and strongly curved backwards.

Systematics

Archaeosyodon's family relationships are unclear. In the past it was assigned to the Syodontidae ( Iwachnenko , 1994) or the Titanosuchidae (Iwachnenko, 1995 and 2003), a group outside of the Anteosauria. A more recent analysis by Christian Kammerer (2011) classifies this genus as a representative Anteosauria, but outside of the Syodontinae, which he declared as a subfamily .

The following is a current example of a cladogram, simplified according to Kammerer (2010):

Anteosauria	Microsyodon      Archaeosyodon      Syodontinae (e.g. Syodon )      Anteosaurinae (e.g. Anteosaurus )

Individual evidence

1. ↑ ^{a b c d e} Christian Kammerer: Systematics of the Anteosauria (Therapsida: Dinocephalia) In: Journal of Systematic Palaeontology , 2010

Web links

Commons : Archaeosyodon  - collection of images, videos and audio files