Theriosuchus

Theriosuchus is an extinct genus of atoposaurid neosuchian from Late Jurassic to Early Cretaceous of Europe (Hungary & southern England), Southeast Asia (Thailand) and western North America (Wyoming), with fragmentary records from Middle Jurassic and Early Cretaceous sites in China, Morocco, and Scotland.^[2]

Theriosuchus Temporal range: Late Jurassic - Early Cretaceous, 145.5–140.2 Ma[1] PreꞒ Ꞓ O S D C P T J K Pg N
Fossil of T. pusillus
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Clade:	Archosauria
Clade:	Pseudosuchia
Clade:	Crocodylomorpha
Clade:	Neosuchia
Clade:	Eusuchia
Family:	†Atoposauridae
Genus:	†Theriosuchus Owen, 1879
Species
T. pusillus Owen, 1879 (type) T. grandinaris Lauprasert et al., 2011 T. morrisonensis Foster, 2018

Taxonomy

Skull elements of T. pusillus

Three valid species are currently recognized: Theriosuchus pusillus from southern England,^[3] T. grandinaris from Thailand,^[4] and T. morrisonensis from the Morrison Formation of North America.^[5] Theriosuchus was previously assigned to Atoposauridae, but a 2016 cladistic analysis recovered it as a neosuchian more closely related to members of the family Paralligatoridae than to atoposaurids.^[2]

Two species previously assigned to this genus, Theriosuchus ibericus^[6] and T. symplesiodon,^[7] have been reassigned to the new genus Sabresuchus.^[2] On the other hand, Theriosuchus guimarotae from Portugal^[8] has been reassigned to Knoetschkesuchus.^[9]