Heylerosauridae is a family

Family (biology)

In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...

 of mastodonsauroid

Mastodonsauroidea

The Mastodonsauroidea are an extinct superfamily of temnospondyl amphibians known from the Triassic and Jurassic. Fossils belonging to this superfamily have been found in North America, Greenland, Europe, Asia, and Australia...

 temnospondyls. It was first named in 1980 to include the genera Odenwaldia and Quasicyclotosaurus

Quasicyclotosaurus

Quasicyclotosaurus is an extinct genus of mastodonsauroid temnospondyl.-See also:* Prehistoric amphibian* List of prehistoric amphibians...

. In addition to these genera, the family now includes Eocyclotosaurus

Eocyclotosaurus

Eocyclotosaurus is an extinct genus of mastodonsauroid temnospondyl....

and Yuanansuchus

Yuanansuchus

Yuanansuchus is an extinct genus of mastodonsauroid temnospondyl. Fossils have been found from the Xinlingzhen formation in Yuan'an County, Hubei, China and date back to the Anisian stage of the Middle Triassic.-See also:* Prehistoric amphibian...

. Recent phylogenetic analyses have not found a close relationship between Odenwaldia and other heylerosaurids and place it outside the family. Heylerosaurids are generally regarded as the sister taxon of the stenotosaurids

Stenotosauridae

Stenotosauridae is an extinct family of mastodonsauroid temnospondyls. It has included genera such as Stenotosaurus, Wellesaurus, and Procyclotosaurus....

.