Taxonomic review of the tree snail genus Amphidromus Albers, 1850 (Pulmonata: Camaenidae) in Laos, with the description of two new species Author Inkhavilay, Khamla 2E620B9C-48BA-48E6-A017-FE8ED2AB0E59 Email: kinkhavilay @ gmail. com & urn: lsid: zoobank. org: author: 2 E 620 B 9 C- 48 BA- 48 E 6 - A 017 - FE 8 ED 2 AB 0 E 59 kinkhavilay@gmail.com Author Sutcharit, Chirasak C2E2FA6B-A3F9-4F33-B447-B59B1BD322D4 urn: lsid: zoobank. org: author: C 2 E 2 FA 6 B-A 3 F 9 - 4 F 33 - B 447 - B 59 B 1 BD 322 D 4 & Corresponding authors: jirasak 4 @ yahoo. com; somsak. pan @ chula. ac. th jirasak4@yahoo.com Author Panha, Somsak AC935098-D901-4F35-A414-4B0D4FE44E79 urn: lsid: zoobank. org: author: AC 935098 - D 901 - 4 F 35 - A 414 - 4 B 0 D 4 FE 44 E 79 & Corresponding authors: jirasak 4 @ yahoo. com; somsak. pan @ chula. ac. th jirasak4@yahoo.com text European Journal of Taxonomy 2017 2017-06-13 330 1 40 journal article 22089 10.5852/ejt.2017.330 14d5ad89-9e69-45f8-bc61-e14ca9deafbd 2118-9773 3829744 FDFA7FAC-FC92-404B-9058-A426DAB6C693 Amphidromus ( Syndromus ) xiengkhaungensis Inkhavilay & Panha sp. nov. urn:lsid:zoobank.org:act: 7BA4B989-3003-4F09-94E5-F21B392BEA28 Figs 1 , 13 S–T; Table 1 Diagnosis The new species is superficially similar to A. roemeri , but the distinguishing characters are a relatively large and thick shell, dark to brownish spire, Bands 2 and 3 merged and become tinted pink stained, with a pale tinted pink lip. In contrast, A. roemeri shows a relatively small and thin shell, whitish ground color, Bands 2 and 3 absent, and has a white lip. Amphidromus xiengkhaungensis sp. nov. differs from A. sinensis and A. flavus by having an ovated conic shell, Bands 2 and 3 stained with tinted pink, ovate aperture and slightly angular last whorl. In comparison, A. sinensis and A. flavus have an elongate conical, relatively small and thin shell, with a yellowish color and rounded last whorl. In addition, A. globonevilli differs from this new species by having a small and thin shell, with a yellowish color, last whorl rounded and Bands 2 and 3 absent. Etymology The specific epithet ‘ xiengkhaungensis ’ refers to the type locality of the new species. Type material Holotype LAOS : shell height 25.6 mm , shell width 15.6 mm , with 6 whorls ( CUMZ 7045 , Fig. 13S ). Paratypes LAOS : 10S shells ( CUMZ 7046, Fig. 13T ); 2S shells ( NHMUK ). Type locality LAOS : limestone outcrop at Ban Nong Tang, Phou Kood District, Xieng Khaung, 19°30′59.2″ N , 102°53′37.6″ E , 1140 m amsl. Description Shell sinistral, ovate conical, rather thick and glossy. Apex acute, color tinted pink; spire conical with dark color; suture wide and depressed. Whorls 5 and 6 nearly smooth; last whorl slightly angular. Periostracum thin, corneous and transparent. Earlier whorls with darker color; varix absent. Shell banding without Band 1; Bands 2 and 3 merged and becoming tinted pink stained; Bands 4 and 5 dark brown; Band 6 absent. Parietal callus thin and transparent to slightly thick and white. Aperture ovate; peristome expanded and weakly thickened; lip pale tinted pink to white. Columella straight, thickend and white. Umbilicus narrowly opened. Remarks Amphidromus xiengkhaungensis sp. nov. is currently known from the type locality only, a dry green forest and isolated limestone forest surrounded by a reservoir and agricultural areas. The empty shells were found on the floor among the leaf litter. Unfortunately, no living specimens have been collected.