''Rubeostratilia'' 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 n ...

of amphibamiform

temnospondyl Temnospondyli (from Greek τέμνειν, ''temnein'' 'to cut' and σπόνδυλος, ''spondylos'' 'vertebra') is a diverse order of small to giant tetrapods—often considered primitive amphibians—that flourished worldwide during the Carb ...

from the

early Permian 01 or '01 may refer to: * The year 2001, or any year ending with 01 * The month of January * 1 (number) Music * 01'' (Richard Müller album), 2001 * ''01'' (Son of Dave album), 2000 * ''01'' (Urban Zakapa album), 2011 * ''O1'' (Hiroyuki Sawano ...

Texas Texas (, ; Spanish language, Spanish: ''Texas'', ''Tejas'') is a state in the South Central United States, South Central region of the United States. At 268,596 square miles (695,662 km2), and with more than 29.1 million residents in 2 ...

. It is known from a single

skull The skull is a bone protective cavity for the brain. The skull is composed of four types of bone i.e., cranial bones, facial bones, ear ossicles and hyoid bone. However two parts are more prominent: the cranium and the mandible. In humans, t ...

. This genus was named by Hélène Bourget and Jason S. Anderson in 2011, and 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 specimen( ...

is ''Rubeostratilia texensis''. The genus name comes from the Latin translation of 'redbeds' in reference to the Texas redbeds that produced both the

holotype A holotype is a single physical example (or illustration) of an organism, known to have been used when the species (or lower-ranked taxon) was formally described. It is either the single such physical example (or illustration) or one of seve ...

and many other early Permian fossils. The specific name is for the state of Texas. The holotype and only known specimen was collected in 1941 from the Nocona Formation exposures in Clay County by a

Works Projects Administration The Works Progress Administration (WPA; renamed in 1939 as the Work Projects Administration) was an American New Deal agency that employed millions of jobseekers (mostly men who were not formally educated) to carry out public works projects, in ...

project that was transferred to the

Field Museum of Natural History The Field Museum of Natural History (FMNH), also known as The Field Museum, is a natural history museum in Chicago, Illinois, and is one of the largest such museums in the world. The museum is popular for the size and quality of its educational ...

through an interinstitutional exchange with the

Texas Memorial Museum The Texas Memorial Museum, located on the campus of the University of Texas at Austin in Austin, Texas, USA, was created during preparations for the Texas Centennial Exposition held in 1936. The museum's focus is on natural history, including pale ...

Anatomy

''Rubeostratilia'' is differentiated from other amphibamiforms by: (1) a pterygoid sutured only to the ectopterygoid anteriorly; and (2) the presence of four, equally sized foramina along the surface of the lacrimal that forms the anterior orbital margin. It shares a number of features with '' Pasawioops mayi,'' which at the time was known only from the Richards Spur locality in Oklahoma but which was subsequently reported from the Archer City Formation in Texas.

Relationships

The relationships of ''Rubeostratilia'' are unstable, which Bourget & Anderson (2011) ascribed to the influence of both missing data and changes to a small number of character codings that produced drastically different results of amphibamiform phylogeny. Below is the result of the parsimony analysis from Bourget & Anderson (2011) when coding for ''

Plemmyradytes shintoni ''Plemmyradytes'' is an extinct genus of dissorophoid temnospondyl from the early Permian (early Asselian stage). It is an amphibamiform from the Eskridge Formation exposures of Nebraska. The type species is ''Plemmyradytes shintoni''. The gen ...

'' was left unchanged: Below is the result of the analysis from Bourget & Anderson (2011) with a number of proposed coding changes: Below is the result of the analysis from Maddin et al. (2013), derived from the matrix of Fröbisch & Reisz (2008):

References

{{Taxonbar, from=Q7376037 Amphibamids Dissorophids Cisuralian temnospondyls of North America Fossil taxa described in 2011 Prehistoric amphibian genera