A First Record Of The Family Cerastidae In Thailand, With A Description Of A New Species (Pulmonata: Orthurethra: Cerastidae) Author Sutcharit, Chirasak Author Naggs, Fred Author Panha, Somsak text Raffles Bulletin of Zoology 2010 2010-08-31 58 2 251 258 journal article 10.5281/zenodo.5342816 2345-7600 5342816 Rhachistia sulphurea (Tomlin & Peile, 1930) ( Fig. 1A, B ) Errorachis sulphurea Tomlin & Peile, 1930: 153–154 , Pl. 17a ( type locality: Pran , Siam ). Rhachistia sulphurea — Schileyko, 1998: 169 ; Hemmen & Hemmen, 2001: 41 Material examined. – The figured specimen in Tomlin & Peile (1930, pl. 17) is designated herein as the lectotype NMW 1955.158 .01155 ( Fig. 1A ), and the paralectotype BMNH 1939.6 .6.17 ( Fig. 1B ) . Remarks . – A bright creamy shell with a yellowish subsutural band clearly distinguishes this species from other known species in this region. Tomlin & Peile (1930) provided a full description of the shell and radula but the genital anatomy is unknown. Our land snail surveys in many locations throughout peninsular Thailand since 1994 have failed to find any specimens that resemble R. sulphurea . If the distribution was restricted to the type locality, Pran, Siam , then it is possible that this species is extinct. Pranburi (= Pran sensu Tomlin & Piele, 1930) lies in an area of western Thailand that has been subjected to extensive deforestation since 1930, with most trees having been felled.