Syodontinae

Syodontinae is a group of dinocephalian therapsids. It is one of two subfamilies in the family Anteosauridae, the other being Anteosaurinae.^[1] They are known from the Middle Permian Period of what is now Russia and South Africa. One of the best known syodontines is Syodon from Russia. The South African form Australosyodon, is one of the earliest known Gondwanan anteosaurs.

Syodontinae Temporal range: Middle Permian 267–260 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Syodon
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Synapsida
Clade:	Therapsida
Suborder:	†Dinocephalia
Family:	†Anteosauridae
Subfamily:	†Syodontinae Ivakhnenko, 1994
Subgroups
†Australosyodon †Notosyodon †Pampaphoneus †Syodon

Description

Syodontines lack the boss on the lower jaw that characterises the related anteosaurines, and they have often been considered more primitive in this respect.

Classification

Below is a cladogram showing syodontine relationships from a 2012 phylogenetic study of anteosaurians:^[2]

Therapsida	Biarmosuchus tener Dinocephalia Estemmenosuchus uralensis Ulemosaurus svijagensis Tapinocaninus pamelae Anteosauridae Archaeosyodon praeventor Anteosaurinae Sinophoneus yumenensis Titanophoneus adamanteus Titanophoneus potens Anteosaurus magnificus Syodontinae Pampaphoneus biccai Notosyodon gusevi Syodon biarmicum Australosyodon nyaphuli