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 ( Amphidromus ) pervariabilis Bavay & Dautzenberg, 1909 Figs 1 , 5 A−L; Table 1 Amphidromus pervariabilis Bavay & Dautzenberg, 1909b: 246-247 . Type locality: Ban-Lao, Muong- Kong, Pha-Long, Pac Kha. Amphidronus pervariabilis – Bavay & Dautzenberg 1909a: 279-281 , pl. 9, figs 1–10, pl. 10, figs 1–8. — Laidlaw & Solem 1961: 527 , 528. — Richardson 1985: 15 . Fig. 5. Shells of Amphidromus pervariabilis Bavay & Dautzenberg, 1909 . A–B . Syntype of the nominotypical form (MNHM-IM-2000-2049). C . Var. “ bifasciata ” Bavay & Dautzenberg, 1909, syntype (MNHM-IM-2000-2059). D . Var. “ goniostoma ” Bavay & Dautzenberg, 1909, syntype (MNHM- IM-2000-2058). E . Var. “ lilacina ” Bavay & Dautzenberg, 1909, syntype (MNHM-IM-2000-2052). F . Var. “ minor ” Bavay & Dautzenberg, 1909, syntype (MNHM-IM-2000-2050). G . Var. “ monozonalis ” Bavay & Dautzenberg, 1909, syntype (MNHM-IM-2000-2057). H . Var. “ obesa ” Bavay & Dautzenberg, 1909, syntype (MNHM-IM-2000-2053). I . Var. “ protracta ” Bavay & Dautzenberg, 1909, syntype (MNHM-IM-2000-2051). J . Var. “ tricolor ” Bavay & Dautzenberg, 1909, syntype (MNHM- IM-2000-2054). K–L . Specimens from Khua District, Phongsaly, Laos (CUMZ 7014). Fig. 6. Genitalia of Amphidromus spp. A–B . Amphidromus roseolabiatus Fulton, 1896 from Ban Phavong, Khammouan, Laos showing reproductive system and interior structures of penis and vaginal chamber (CUMZ 7012). C–D . Amphidromus syndromoideus sp. nov. , holotype, showing general characteristics of the genital system and interior structures of penis and vagina chamber (CUMZ 7019). Material examined Type material VIETNAM : 2 shells ( Fig. 5 A–B), syntypes of A. pervariabilis s.str. MNHM-IM- 2000-2049 , from Ban- Lao [ 19° 39′ N , 103° 19′ E ], Muong-Kong [ 19° 33′ N , 104° 44′ E ], Pha-Long [ 22° 48′ N , 104° 14′ E ], Pac Kha [ 21° 00′ N , 104° 35′ E ]. VIETNAM : 2 shells ( Fig. 5C ), syntypes of A. pervariabilis var. “ bifasciata ”, from Ban-Lao, Muong- Kong, Pha-Long, Pac Kha (MNHM-IM- 2000-2059 ). VIETNAM : 1 shell ( Fig. 5D ), syntype of A. pervariabilis var. “ goniostoma ”, from Phong-Tho, 22°34′ N , 103°22′ E (MNHM-IM- 2000-2058 ). Fig. 7. SEM images of the radula. A–C . Amphidromus roseolabiatus Fulton, 1896 from Ban Phavong, Khammouan, Laos (CUMZ 7012). D–F . Amphidromus syndromoideus sp. nov. , holotype (CUMZ 7019). G–I . Amphidromus areolatus (Pfeiffer, 1861) from Thad Fek, Attapue, Laos (CUMZ 7023). A, D, G = central tooth with the first to fifth to eighth lateral teeth; B, E, H = lateral teeth with the tricuspid marginal teeth transition; C, F, I = outermost marginal teeth. Numbers indicate the order of the lateral and marginal teeth. Central tooth indicated by ‘C’. VIETNAM : 2 shells ( Fig. 5E ), syntypes of A. pervariabilis var. “ lilacina ”, from Ban-Lao (MNHM- IM- 2000-2052 ). VIETNAM : 1 shell ( Fig. 5F ), syntype of A. pervariabilis var. “ minor ”, from unknown locality (MNHM- IM-2000-2050). VIETNAM : 2 shells ( Fig. 5G ), syntypes of A. pervariabilis var. “ monozonalis ”, from Ban-Lao (MNHM- IM- 2000-2057 ). VIETNAM : 1 shell ( Fig. 5H ), syntype of A. pervariabilis var. “ obesa ”, from Muong-Bo, 22°24′ N , 102°49′ E (MNHM-IM- 2000-2053 ). VIETNAM : 1 shell ( Fig. 5I ), syntype of A. pervariabilis var. “ protracta ”, from Ban-Lao, Muong-Kong, Pha-Long, Pac Kha (MNHM-IM- 2000-2051 ). VIETNAM : 2 shells ( Fig. 5J ), syntypes of A. pervariabilis var. “ tricolor ”, from Ban-Lao (MNHM- IM- 2000-2054 ). Other material LAOS : 3 shells ( Fig. 5 K–L), Km 34, road to Ban Namly, Khua District, Phongsaly , 21°11′55.5″ N , 102°6′40.2″ E , 834 m amsl ( CUMZ 7014). Description Shell chirally dimorphic, elongate conical, rather thick and glossy. Spire elongate conical; apex acute, with or without black spot on tip. Whorls 6 to 7 convex to smooth; suture wide and shallow; last whorl rounded to well rounded. Periostracum thin corneous; varix usually absent. Shell color varies from uniform white, yellowish to reddish brown or with narrow to wide brownish peripheral and umbilical bands. Parietal callus thin and transparent. Aperture ovate to oblique elongated; peristome expanded and not reflected; lip white, brownish or purplish. Columella straight, thick or thin and white or brownish. Umbilicus imperforated. Remarks This species tend to have a high diversity of shell colors, with eight infra-specific names being provisionally proposed to distinguish the distinct shell shape and color patterns. We examined all the type specimens and recognized them as subspecific entities of one species. Laidlaw & Solem (1961) recognized this species as a synonym of A. dautzenbergi Fulton, 1899 . The latter species exhibits a thin shell, yellowish with a thin faded greenish streak near the umbilicus, a white subsutural band and an elongated ovate aperture, while A. pervariabilis has a thick shell, monochrome or with dark brown spiral band and ovate aperture. However, the type locality of A. dautzenbergi was “ Tonkin ”, the historical political division during the French colonial period, and it still is an uncertain boundary. The species is known from the holotype only ( Sutcharit et al . 2015 : fig. 6g ), no specimen was found in the present study, and, therefore, the taxonomic status of A. dautzenbergi and A. pervariabilis remains to be confirmed.