Almasaurus
{{Short description|Extinct genus of amphibians}}
{{Automatic taxobox
| fossil_range = {{Geological range|235|231|Late Triassic}}
| taxon = Almasaurus
| authority = Dutuit, 1972
| type_species = {{extinct}}A. habbazi
| type_species_authority = Dutuit, 1972
}}
Almasaurus is an extinct genus of trematosaurian temnospondyl within the family Latiscopidae. It is known from several skulls and some postcranial material found from the Argana Formation in Morocco, which dates back to the Late Triassic.
When it was first named in 1972, Almasaurus was placed within its own superfamily, the Almasauroidea.{{cite journal |last=Dutuit |first=J.-M. |year=1972 |title=Un nouveau genre de Stégocephale du Trias Supérieur Marocain: Almasaurus habbazi |url=https://www.biodiversitylibrary.org/item/246265#page/2/mode/1up |journal=Bulletin du Museum national d'histoire naturelle, Paris |volume=3 |pages=73–77}} Although the related latiscopid Latiscopus disjunctus possesses exoccipitals that are underplated (a feature that suggests that it is a member of the family Trematosauridae){{cite journal |last=Wilson |first=J. A. |year=1948 |title=A small amphibian from the Triassic of Howard County, Texas |journal=Journal of Paleontology |volume=22 |pages=359–361}} Almasaurus is not considered to be a trematosaurid because it lacks such underplating.{{cite journal |last=Warren |first=A. |author2=Black, T. |year=1985 |title=A new rhytidosteid (Amphibia, Labyrinthodontia) from the Early Triassic Arcadia Formation of Queensland, Australia, and the relationships of Triassic temnospondyls |journal=Journal of Vertebrate Paleontology |volume=5 |issue=4 |pages=303–327 |doi=10.1080/02724634.1985.10011868}} Almasaurus was considered to be a capitosaurian by Warren & Black (1985) because it shared several characters with the group, including a deeply notched squamosal and a lacrimal flexure, while supposedly exhibiting none of the characters associated with trematosaurians. However, more recent studies have concluded that Almasaurus is either a temnospondyl more basal than the clade formed from the dichotomy between Capitosauria and Trematosauria{{cite journal |last=Steyer |first=J. S. |year=2002 |title=The first articulated trematosaur ‘amphibian’ from the Lower Triassic of Madagascar: implications for the phylogeny of the group |journal=Palaeontology |volume=45 |pages=771–793 |doi=10.1111/1475-4983.00260}} or that the genus is closely related to the trematosaurian family Metoposauridae, perhaps being a sister taxon of it.{{cite journal |last=Yates |first=A. M. |author2=Warren, A. A. |year=2000 |title=The phylogeny of the ‘higher’ temnospondyls (Vertebrata: Choanata) and its implications for the monophyly and origins of the Stereospondyli. |journal=Zoological Journal of the Linnean Society |volume=128 |pages=77–121 |doi=10.1111/j.1096-3642.2000.tb00650.x|doi-access=free }}{{cite journal |last=Schoch |first=R. R. |year=2008 |title=A new stereospondyl from the German Middle Triassic, and the origin of the Metoposauridae |journal=Zoological Journal of the Linnean Society |volume=152 |pages=79–113 |doi=10.1111/j.1096-3642.2007.00363.x|doi-access=free }}
A temnospondyl genus described in 2000, Rileymillerus, is thought to be closely related to Almasaurus.{{cite journal |last=Bolt |first=J. R. |author2=Chatterjee, S. |year=2000 |title=A new temnospondyl amphibian from the Late Triassic of Texas |journal=Journal of Paleontology |volume=74 |pages=670–683 |doi=10.1666/0022-3360(2000)074<0670:ANTAFT>2.0.CO;2}}
Below is a cladogram showing the phylogenetic position of Almasaurus, from Schoch (2008):
{{clade| style=font-size:100%;line-height:85%
|1={{clade
|label2=Trematosauria
|2={{clade
|label1=unnamed
|1={{clade
|1=Aphaneramma
|2=Trematolestes}}
|label2=unnamed
|2={{clade
|label3=unnamed
|3={{clade
|1=Almasaurus
|label2=unnamed
|2={{clade
}} }} }} }} }} }}
See also
References
{{Reflist}}
External links
- [https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=37167 Almasaurus] in the Paleobiology Database
{{Trematosauria|M.}}
{{Taxonbar|from=Q4733713}}
Category:Triassic temnospondyls of Africa