Latiscopus
| Latiscopus Temporal range:
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|---|---|
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Order: | †Temnospondyli |
| Suborder: | †Stereospondyli |
| Family: | †Latiscopidae |
| Genus: | †Latiscopus Wilson, 1948 |
| Type species | |
| †Latiscopus disjunctus Wilson, 1948
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Latiscopus disjunctus is a small Late Triassic temnospondyl collected in 1940 by a Works Projects Administration crew working near Otis Chalk, Texas that was described by John Wilson in 1948.[1]
Description
[edit]The holotype and only known specimen consists of a largely complete skull that was unfortunately overprepared, removing many of the surficial details; the specimen is reposited at the Texas Memorial Museum. Wilson provided a short description of features that he could observe, remarking on its distinction from the much larger, aquatic temnospondyls found in the Late Triassic and referred the taxon to a new family, the Latiscopidae. He placed this family within the Stereospondyli based on a few aspects of the palate and the absence of rhachitomous temnospondyls in the Dockum Group. He considered it somewhat similar to the Trematosauridae based on the relatively long and narrow skull but remarked that Latiscopus was probably not aquatic based on the laterally facing orbits. Subsequent authors proposed various affinities, including to rhytidosteids,[2] with Almasaurus habbazi,[3] another small temnospondyl from the Late Triassic of disputed phylogenetic affinities, and to trematosaurs.[4] Because of its poor condition, Latiscopus has never been analyzed in a phylogenetic analysis, but Almasaurus, which is sometimes placed within the Latiscopidae, is typically recovered as a trematosaur.[5]
Latiscopus was re-examined as part of the description of the morphologically similar Rileymillerus from the Late Triassic of Texas.[6] Bolt & Chatterjee amended many of the statements made by Wilson, frequently noting that claims about the anatomy could not be verified or were erroneous. They concluded that the specimen was too poorly preserved in its current state to be properly comparable to other temnospondyls and designated it as a nomen dubium.[6]
References
[edit]- ^ Wilson, John (1948). "A small amphibian from the Triassic of Howard County". Journal of Paleontology. 22 (3): 359–361. JSTOR 1299405.
- ^ Cosgriff, John W. (1965). "A new genus of Temnospondyli from the Triassic of Western Australia". Journal of the Royal Society of Western Australia. 48: 65–90.
- ^ Cosgriff, John W.; Zawiskie, John M. (1979). "A new species of the Rhytidosteidae from the Lystrosaurus zone and a review of the Rhytidosteioidea". Palaeontologia Africana. 22: 1–27.
- ^ Warren, Anne; Black, Trevor (1985). "A new rhytidosteid (Amphibia, Labyrinthodontia) from the Early Triassic Arcadia Formation of Queensland, Australia, and the relationships of Triassic temnospondyls". Journal of Vertebrate Paleontology. 5 (4): 303–327. doi:10.1080/02724634.1985.10011868. ISSN 0272-4634.
- ^ Schoch, Rainer R. (2008-01-22). "A new stereospondyl from the German Middle Triassic, and the origin of the Metoposauridae" (PDF). Zoological Journal of the Linnean Society. 152 (1): 79–113. doi:10.1111/j.1096-3642.2007.00363.x. ISSN 0024-4082.
- ^ a b Bolt, John R.; Chatterjee, Sankar (2000). "A new temnospondyl amphibian from the Late Triassic of Texas". Journal of Paleontology. 74 (4): 670–683. doi:10.1666/0022-3360(2000)074<0670:ANTAFT>2.0.CO;2. ISSN 0022-3360.
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