''Reiszorhinus'' is an extinct

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nom ...

of Early Permian captorhinid known from the

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territori ...

. The

type species In zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the species that contains the biological type specime ...

is ''Reiszorhinus olsoni''. Fossils have been found from the Waggoner Ranch Formation in north-central

Texas Texas (, ; Spanish: ''Texas'', ''Tejas'') is a state in the South Central region of the United States. At 268,596 square miles (695,662 km2), and with more than 29.1 million residents in 2020, it is the second-largest U.S. state by ...

. It is distinguishable by its recurved teeth and extremely large Meckelian foramen on the inner surface of the lower jaw. It has been considered a primitive member of its family because it has a single tooth along the margins of the jaws. While most single-tooth-rowed captorhinids are small, ''Reiszorhinus'' is relatively large. However, ''Reiszorhinus'' differs from other large captorhinids in that the cheek region is not wide and expanded. ''Reiszorhinus olsoni'' was first named in 2010. Specimens belonging to the species were previously misidentified as those of the similar captorhinid ''

Labidosaurus hamatus ''Labidosaurus'' (from el, λᾰβῐ́δος , 'forceps' and el, σαῦρος , 'lizard') is an extinct genus of reptile from the Permian period of North America. Fossils have been discovered in Texas. It was heavily built, resembling a liza ...

''. ''Reiszorhinus'' is one of the most basal captorhinids, along with the genera ''

Romeria Christianity has a strong tradition of pilgrimages, both to sites relevant to the New Testament narrative (especially in the Holy Land) and to sites associated with later saints or miracles. History Christian pilgrimages were first made to si ...

'', '' Concordia'', and '' Protocaptorhinus''.

References

Fossils of the United States Permian reptiles of North America Fossil taxa described in 2010 Captorhinids Prehistoric reptile genera {{permian-reptile-stub