Cyclotosaurus cf. posthumus, Fraas, 1913

Nonsrirach, Thanit, Manitkoon, Sita & Lauprasert, Komsorn, 2021, First occurrence of brachyopid temnospondyls in Southeast Asia and review of the Mesozoic amphibians from Thailand, Fossil Record 24 (1), pp. 33-47 : 35

publication ID

https://doi.org/ 10.5194/fr-24-33-2021

DOI

https://doi.org/10.5281/zenodo.12110271

persistent identifier

https://treatment.plazi.org/id/6D66DD4E-6735-FFF1-FF23-FA9770D4FB56

treatment provided by

Felipe

scientific name

Cyclotosaurus cf. posthumus
status

 

Cyclotosaurus cf. posthumus

Reference material

D.M. R. no. Ch.D 001 ( Fig. 2a–c View Figure 2 ); a posterior part of a skull ( Ingavat and Janvier, 1981).

Formation/age

Huai Hin Lat Formation (Carnian–Norian).

Locality and sediment

The specimen was discovered in 1981 at an outcrop near the Chulabhorn Dam, Khon San District , Chaiyaphum Province. The fossil assemblage layer consists of a grey to red conglomerate .

Description

D.M. R. no. Ch.D 001 is a posterior part of a comparatively large skull (approximately 20 cm wide and 11 cm long), but the lateral part of the right side is missing. However, a pair of otic notches and a pineal foramen are preserved. The pattern of the ornamentation and the shallow interotic embayment of this skull allow an assignment to Cyclotosaurus ( Fraas, 1913; Ingavat and Janvier, 1981; Damiani, 2001) and are similar to those of the holotype of Cyclotosaurus posthumus Fraas, 1913 from the Upper Middle Keuper, Bavaria ( Germany).

R

Departamento de Geologia, Universidad de Chile

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