# Laccosaurus

> Mediated Wiki article. Canonical URL: https://mediated.wiki/source/Laccosaurus
> Markdown URL: https://mediated.wiki/source/Laccosaurus.md
> Source: https://en.wikipedia.org/wiki/Laccosaurus
> Source revision: 1301102297
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

Extinct genus of temnospondyls

Laccosaurus Temporal range: Lopingian PreꞒ Ꞓ O S D C P T J K Pg N Scientific classification Kingdom: Animalia Phylum: Chordata Clade: Tetrapoda Order: †Temnospondyli Suborder: †Stereospondyli Family: †Rhinesuchidae Genus: †Laccosaurus Haughton, 1925 Type species †Laccosaurus watsoni Haughton, 1925

***Laccosaurus*** is an extinct [monotypic](/source/Monotypic) [genus](/source/Genus) of [rhinesuchid](/source/Rhinesuchidae) [temnospondyl](/source/Temnospondyl), the [type species](/source/Type_species) being ***Laccosaurus watsoni***.

## History of study

*Laccosaurus* *watsoni* was named by paleontologist [Sidney H. Haughton](/source/Sidney_H._Haughton) in 1925 on the basis of a largely complete skull from the *Dicynodon-Theriognathus* subzone of the [*Daptocephalus* Assemblage Zone](/source/Daptocephalus_Assemblage_Zone) in South Africa.[1][2][3] This genus and/or species has sometimes been synonymized with *[Uranocentrodon](/source/Uranocentrodon)*,[4][5][6] but this framework has not been adopted by recent workers.[7][2][8] However, there is uncertainty related to the single referred specimen (BPI/1/4473); Eltink et al. (2019) consider this to belong to a different taxon, while Marsicano et al. (2017) considered it to belong to *L. watsoni*.

## Anatomy

Marsicano et al. (2017) were the most recent to diagnose this taxon and list the following unique combination of characters: "well-developed sensory sulci, infra-orbital sulcus with a step/S- like flexure between the orbit and the naris; width of interpterygoid vacuity pair greater than 90% of their length; vomers with field of denticles in symmetrical raised patches medially to the choanae; straight transverse vomerine tooth row; quadrate condyles projected behind the tip of the tabular horns; parasphenoid plate subrectangular, longer than wide, with a flat ventral surface; well-developed ‘pockets’, close to each other, thus the cristae musculares converge in the midline."

## References

- [Paleontology portal](https://en.wikipedia.org/wiki/Portal:Paleontology)

1. **[^](#cite_ref-1)** Haughton, Sidney H. (1925). ["Investigations in South African Fossil Reptiles and Amphibia. Part 13. Descriptive Catalogue of the Amphibia of the Karroo System"](https://www.biodiversitylibrary.org/part/74686). *Annals of the South African Museum. Annale van die Suid-Afrikaanse Museum*. **22**: 227–261. [ISSN](/source/ISSN_(identifier)) [0303-2515](https://search.worldcat.org/issn/0303-2515).

1. ^ [***a***](#cite_ref-:0_2-0) [***b***](#cite_ref-:0_2-1) Marsicano, Claudia A.; Latimer, Elizabeth; Rubidge, Bruce; Smith, Roger M.H. (2017-05-29). ["The Rhinesuchidae and early history of the Stereospondyli (Amphibia: Temnospondyli) at the end of the Palaeozoic"](https://dx.doi.org/10.1093/zoolinnean/zlw032). *Zoological Journal of the Linnean Society*. [doi](/source/Doi_(identifier)):[10.1093/zoolinnean/zlw032](https://doi.org/10.1093%2Fzoolinnean%2Fzlw032). [hdl](/source/Hdl_(identifier)):[11336/105150](https://hdl.handle.net/11336%2F105150). [ISSN](/source/ISSN_(identifier)) [0024-4082](https://search.worldcat.org/issn/0024-4082).

1. **[^](#cite_ref-3)** Viglietti, P.A. (2020-06-01). ["Biostratigraphy of the Daptocephalus Assemblage Zone (Beaufort Group, Karoo Supergroup), South Africa"](https://pubs.geoscienceworld.org/gssa/sajg/article/123/2/191/587461/Biostratigraphy-of-the-Daptocephalus-Assemblage). *South African Journal of Geology*. **123** (2): 191–206. [doi](/source/Doi_(identifier)):[10.25131/sajg.123.0014](https://doi.org/10.25131%2Fsajg.123.0014). [ISSN](/source/ISSN_(identifier)) [1996-8590](https://search.worldcat.org/issn/1996-8590).

1. **[^](#cite_ref-4)** Sherwood, Romer, Alfred (1947). *Review of the labyrinthodontia*. [OCLC](/source/OCLC_(identifier)) [253748351](https://search.worldcat.org/oclc/253748351).{{[cite book](https://en.wikipedia.org/wiki/Template:Cite_book)}}: CS1 maint: multiple names: authors list ([link](https://en.wikipedia.org/wiki/Category:CS1_maint:_multiple_names:_authors_list))

1. **[^](#cite_ref-5)** Ochev, Vitaliĭ G. (1966). *Systematics and phylogeny of capitosauroid labyrinthodonts* (in Russian). Saratov: Saratov State University Press. pp. 1–181.

1. **[^](#cite_ref-6)** Schoch, Rainer R.; Milner, Andrew R. (2000). *Handbuch der Paläoherpetologie Part 3B. Stereospondyli*. Stuttgart: Verlag Dr. Friedrich Pfeil. pp. 1–106. [ISBN](/source/ISBN_(identifier)) [978-3-931516-26-0](https://en.wikipedia.org/wiki/Special:BookSources/978-3-931516-26-0). [OCLC](/source/OCLC_(identifier)) [580976](https://search.worldcat.org/oclc/580976).

1. **[^](#cite_ref-7)** Damiani, Ross J. (2004). ["Temnospondyls from the Beaufort Group (Karoo Basin) of South Africa and Their Biostratigraphy"](https://dx.doi.org/10.1016/s1342-937x(05)70315-4). *Gondwana Research*. **7** (1): 165–173. [doi](/source/Doi_(identifier)):[10.1016/s1342-937x(05)70315-4](https://doi.org/10.1016%2Fs1342-937x%2805%2970315-4). [ISSN](/source/ISSN_(identifier)) [1342-937X](https://search.worldcat.org/issn/1342-937X).

1. **[^](#cite_ref-8)** Eltink, Estevan; Schoch, Rainer R.; Langer, Max C. (2019-04-16). ["Interrelationships, palaeobiogeography and early evolution of Stereospondylomorpha (Tetrapoda: Temnospondyli)"](https://dx.doi.org/10.1007/s41513-019-00105-z). *Journal of Iberian Geology*. **45** (2): 251–267. [doi](/source/Doi_(identifier)):[10.1007/s41513-019-00105-z](https://doi.org/10.1007%2Fs41513-019-00105-z). [ISSN](/source/ISSN_(identifier)) [1698-6180](https://search.worldcat.org/issn/1698-6180).

v t e Stereospondyli Kingdom: Animalia Phylum: Chordata Clade: Tetrapodomorpha Order: Temnospondyli Tetrapodomorpha see Tetrapodomorpha Temnospondyli see Temnospondyli Stereospondyli see below↓ Stereospondyli Stereospondyli Arachana Capulomala Peltobatrachus Lapillopsidae Lapillopsis Manubrantlia Rhigerpeton Rotaurisaurus Rhinesuchidae Australerpeton? Broomistega Laccosaurus Parapytanga? Rastosuchus Rhineceps Rhinesuchoides Rhinesuchus Uranocentrodon Lydekkerinidae Chomatobatrachus Cryobatrachus Deltacephalus Eolydekkerina Indobenthosuchus Luzocephalus? Lydekkerina Capitosauria Antarctosuchus Bukobaja Calmasuchus Capitosaurus Cherninia Cyclotosaurus Edingerella Eocyclotosaurus Eryosuchus Heptasaurus Huangfuchuansuchus Jammerbergia Kestrosaurus Kupferzellia Mastodonsaurus Meyerosuchus Odenwaldia Paracyclotosaurus Parotosuchus Quasicyclotosaurus Procyclotosaurus Promastodonsaurus Rhadalognathus Samarabatrachus Sassenisaurus Sclerothorax Selenocara Stanocephalosaurus Stenotosaurus Subcyclotosaurus Tatrasuchus Vladlenosaurus Volgasaurus Volgasuchus Warrenisuchus Watsonisuchus Wellesaurus Wetlugasaurus Xenotosuchus Yuanansuchus Trematosauria see below↓ Trematosauria Trematosauria Almasaurus Bothriceps Callistomordax Chinlestegophis Keratobrachyops Laidleria Latiscopus Qantas Rileymillerus Syrtosuchus Uruyiella Benthosuchidae Benthosuchus Kwatisuchus Trematosauridae Angusaurus Aphaneramma Cosgriffius Erythrobatrachus Gonioglyptus Hyperokynodon Icanosaurus Indolyrocephalus Inflectosaurus Lyrocephaliscus Microposaurus Panchetosaurus Platystega Prothoosuchus Stoschiosaurus Tertrema Tertremoides Thoosuchus Tirraturhinus Trematolestes Trematosuchoides Trematosaurus Trematosuchus Trematotegmen Wantzosaurus Metoposauridae Anaschisma Apachesaurus Arganasaurus Buettnererpeton Dutuitosaurus Metoposaurus Panthasaurus Rhytidosteidae Boreopelta Mahavisaurus Nanolania Peltostega Pneumatostega Rhytidosteus Sangaia Trucheosaurus Derwentiinae Arcadia Acerastia Deltasaurus Derwentia Indobrachyops Rewana Chigutisauridae Arenaerpeton Chigutisaurus Compsocerops Koolasuchus Pelorocephalus Siderops Brachyopidae Banksiops Bathignathus Batrachosaurus Batrachosuchoides Batrachosuchus Blinasaurus Brachyops Gobiops Hadrokkosaurus Notobrachyops Platycepsion Sinobrachyops Vanastega Vigilius Xenobrachyops Plagiosauridae Gerrothorax Megalophthalma Plagiobatrachus Plagiorophus Plagiosaurus Plagioscutum Plagiosternum Plagiosuchus See also: Trematosauroidea Metoposauroidea Rhytidosteoidea Brachyopomorpha Brachyopoidea Plagiosauroidea Category

Taxon identifiers Laccosaurus Wikidata: Q6468165 GBIF: 4816355 IRMNG: 1415385 Open Tree of Life: 3620886 Paleobiology Database: 266935

---
Adapted from the Wikipedia article [Laccosaurus](https://en.wikipedia.org/wiki/Laccosaurus) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Laccosaurus?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.