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 Naticopsis ? sp. 4 ( Fig. 20J ) Material. One specimen: ESKU-19- LP 52. Dimensions (mm): ESKU-19- LP 52: height = 6.0; width = 8.0; apical angle = 126 º ; apertural height = 4.2; apertural width = 5.2. Remarks. The present specimen is low-spired with the spire only somewhat protruding, consisting of three smooth rapidly increasing whorls. The body-whorl is very inflated, the height of the last whorl is about 90% of the total shell height. The aperture is broad with a thick inductura and seems to develop a columellar fold which has never been observed in Naticopsis . However, the preservation of the aperture is insufficient to be sure that a fold is really present.