Plagiosauridae indet.

Reference material

TF 1453 (Fig. 2e–f), a dermal bone (Suteethorn et al., 1988).

Formation/age

Huai Hin Lat Formation (Carnian–Norian).

Locality and sediment

Outcrop near the Chulabhorn Dam, Kon San District, Chaiyaphum Province. The outcrop is located in the upper part of the Huai Hin Lat Formation (Suteethorn et al., 1988). The specimen was embedded in a block of carbonaceous black shale rock .

Description

The specimen TF 1453, approximately 22 mm wide and 25 mm long, shows a peculiar ornamentation consisting of tubercles or pustules on its ventral surface. Dorsally, the surface shows some faint radiating grooves and ridges. Based on its ornamentation, TF 1453 was interpreted as a dermal bone fragment of a temnospondyl and was assigned to Plagiosauridae . A comparable ornamentation is observed in Middle to Late Triassic Plagiosauridae, e.g., Gerrothorax pulcherrimus and Plagioscutum ochevi from Europe (Shishkin, 1986; Warren and Snell, 1991; Suteethorn et al., 1988; Jenkins et al., 2008).