Middle Permian (Roadian) gastropods from the Khao Khad Formation, Central Thailand: Implications for palaeogeography of the Indochina Terrane Author Ketwetsuriya, Chatchalerm Author Karapunar, Baran Author Charoentitirat, Thasinee Author Nützel, Al- Exander text Zootaxa 2020 2020-04-17 4766 1 1 47 journal article 10.11646/zootaxa.4766.1.1 ed4d1bf6-284a-4898-952a-58943d5a3026 1175-5334 3763907 urn:lsid:zoobank.org:pub:B1B5DA41-5035-4783-8D47-28857B6305AE Palaeostylus sp. ( Fig. 24 A–B) Material. One specimen: ESKU-19- LP 7. Dimensions (mm): ESKU-19- LP 7: height = 3.6; width = 2.2; apical angle = 84 º . Remarks. This small, high-spired, cyrtoconoid, shell has a straight whorl face that is ornamented by slightly opisthocline axial ribs, forming node-like extensions situated immediately adjacent to the adapical suture. The whorls are low as is typical for the genus Palaeoestylus . Similar shells do also occur in the genera Pseudozygopleura Knight, 1930 and Zygopleura Koken, 1892 . The present specimen is too fragmentary for an identification.