New Tonkinospira Jochum, Slapnik & Páll-Gergely, 2014 species from Laos and Vietnam (Gastropoda: Pulmonata: Hypselostomatidae) Author Páll-Gergely, Barna Author Grego, Jozef Author Vermeulen, Jaap J. Author Reischütz, Alexander Author Hunyadi, András Author Jochum, Adrienne text Raffles Bulletin of Zoology 2019 2019-11-08 67 517 535 journal article 10.26107/RBZ-2019-0041 2345-7600 4576444 AAA866A1-FBAF-486D-AB84-3AB989A269C1 Tonkinospira defixa ( Bavay & Dautzenberg, 1912 ) ( Fig. 6 ) Systenostoma defixa Bavay & Dautzenberg, 1912: 22–23 , pl. 1, figs 18–19. ( type locality: Ile de la Table, baie d’Along [«Table Island» in the Halong Bay; the exact location of that island could not be located]). Systenostoma defixa — Pilsbry, 1917: 226, pl. 38, figs 15–16. Tonkinospira defixa — Jochum et al., 2014: 32 , fig. 1. Types examined. 1 shell syntype (H: 1.09 mm , D: 1.57 mm , Fig. 6 ) (MNHN-IM-2000-32866), Île de la Table, Baie d’Along, coll. Demange. Other material examined. Tonkin , coll. S.H. Jaeckel ex Rolle, SMF 202926/3; RBINS Dautzenberg Collection reg. nr. IG 10591 (tray 844), 2 shells (probably syntypes ) . Diagnosis. A small Tonkinospira species with a strongly depressed shell, dense spiral striation, and a peristome that is not adnate to penultimate whorl. Description. Shell small for the genus; strongly depressed with conical dorsal side and strongly widened body whorl; body whorl bluntly keeled; 4.25 whorls, regularly increasing except for the body whorl; protoconch consists of 1.25 whorls, finely pitted and with dense, regularly strong spiral striations; teleoconch with irregular, rough radial growth lines, and dense, regular spiral striation, ca. 28 in number in the middle shell line from apertural view; aperture strongly oblique to shell axis from lateral view; aperture ovate-oblong; peristome expanded but not reflected; aperture not adnate to penultimate whorl; umbilicus wide. Differential diagnosis. This species is characterized by its depressed shell, keeled body whorl and wide umbilicus.