Atoposauridae

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.

Atoposauridae is an extinct family of neosuchian crocodyliforms, known from the Jurassic and Cretaceous of Eurasia. Characterised by their small size and their heterodont (having multiple tooth types) dentition, they are thought to have lived in terrestrial and semi-aquatic environments, and to have consumed small prey such as fish, insects and mammals. The oldest records of the group are known from the Middle Jurassic of Britain. The majority of the family are known from Late Jurassic to Early Cretaceous deposits in France, Portugal, and Bavaria in southern Germany. The discovery of the genus

Atoposaurus is an extinct genus of crocodylomorph. It is the type genus of the family Atoposauridae. Fossils have been found that were Late Jurassic in age from two distinct species in France and Germany.

Alligatorium is an extinct genus of atoposaurid crocodylomorph from Late Jurassic marine deposits in France.

thumb|left|Fossil specimen Alligatorellus is an extinct genus of atoposaurid crocodyliform found in France that was related to Atoposaurus.

Knoetschkesuchus is a genus of small atoposaurid crocodylomorph from the Late Jurassic of Germany and Portugal. Two species are known: the German species K. langenbergensis, described by Schwarz and colleagues in 2017 based on two partial skeletons and various isolated bones; and the Portuguese species K. guimarotae, named from over 400 specimens including several partial skeletons. Knoetschkesuchus was a small and short-snouted crocodilian, measuring about in length, that primarily fed on small prey, including invertebrates, amphibians, and mammals. This specialization towards small prey ecol