Five times over: 42 new Angustopila species highlight Southeast Asia's rich biodiversity (Gastropoda, Stylommatophora, Hypselostomatidae) Author Pall-Gergely, Barna https://orcid.org/0000-0002-6167-7221 Centre for Agricultural Research, Plant Protection Institute, Eoetvoes Lorand Research Network, Herman Otto ut 15, H- 1022 Budapest, Hungary pallgergely2@gmail.com Author Hunyadi, Andras Adria setany 10 G 2 / 5., H- 1148 Budapest, Hungary Author Vermeulen, Jaap J. JK Art and Science, Lauwerbes 8, 2318 AT Leiden, Netherlands Author Grego, Jozef Horna Micina 219, SK- 97401 Banska Bystrica, Slovakia Author Sutcharit, Chirasak Animal Systematic Research Unit, Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand Author Reischuetz, Alexander Puechhaimgasse 52, A- 3580 Horn, Austria Author Dumrongrojwattana, Pongrat Department of Biology, Faculty of Science, Burapha University, 169 Longhardbangsaen Road, Muang District, Chonburi, 20131, Thailand Author Botta-Dukat, Zoltan Centre for Ecological Research, Institute of Ecology and Botany, Alkotmany 2 - 4, H- 2600, Vacratot, Hungary Author Oerstan, Aydin 12501 Milestone Manor Lane, Germantown, Maryland, 20876, USA Author Fekete, Judit University of Pannonia, Centre of Natural Science, Research Group of Limnology, Egyetem u. 10, H- 8200 Veszprem, Hungary & Centre for Ecological Research, Institute of Aquatic Ecology, Department of Tisza Research, 18 / c Bem square, H- 4026 Debrecen, Hungary Author Jochum, Adrienne https://orcid.org/0000-0002-6624-6412 Naturhistorisches Museum der Burgergemeinde Bern, CH- 3005 Bern, Switzerland & Institute of Ecology and Evolution, University of Bern, CH- 3012 Bern, Switzerland & Senckenberg Forschungsinstitut und Naturmuseum, 60325 Frankfurt am Main, Germany text ZooKeys 2023 2023-02-13 1147 1 177 http://dx.doi.org/10.3897/zookeys.1147.93824 journal article http://dx.doi.org/10.3897/zookeys.1147.93824 1313-2970-1147-1 9BB9881B0076473D8E53155D37CA1F50 FF2B6B317B505F9EA0E1000BDCD16CE7 Angustopila coprologos uninodus Pall-Gergely & Grego ssp. nov. Fig. 88 Type material. Holotype : Laos • 1 empty shell (H: 0.54 mm, D: 0.7 mm); Bolikhamsay Province, NE foot of Pha Hong limestone massif 7 km N of Lak Sao (locality code: JG12); 18°13.91'N , 104°56.41'E ; 16 Feb. 2017; J. Grego leg.; NHMUK 20170295. Paratypes : Laos • 3 shells; same data as for holotype; coll. JG • 1 shell; same data as for holotype; NMBE 550641 • 152 shells; Bolikhamsai Province, 5.2 km northwest from centre of Lak Sao, 600 m east of quarry, limestone rock (locality code: 2019/111); 18°13.54'N , 104°56.89'E ; 515 m a.s.l.; 2 Oct. 2019; A. Hunyadi leg.; coll. HA • 5 shells; same data as for preceding; coll. JJV • 14 shells; Bolikhamsai Province, 5.3 km west-southwest of centre of Lak Sao, rock wall above Wat Pa Pha Nang Rong (locality code: 2019/109); 18°11.30'N , 104°56.45'E ; 520 m a.s.l.; 1 Oct. 2019; A. Hunyadi leg.; coll. HA. Differential diagnosis. This subspecies differs from the nominotypical subspecies in the possession of a single (instead of two) palatal denticle. Judging from the relative position, the single palatal tooth of Angustopila coprologos uninodus ssp. nov. is homologous with the upper palatal tooth of A. coprologos coprologos . Figure 88. Angustopila coprologos uninodus Pall-Gergely & Grego, ssp. nov. (holotype, NHMUK 20170295). Ventral ( A ), apertural ( B ), lateral ( C ), and apical ( D ) sides of the shell; aperture ( E-F ); sculpture of the protoconch ( G ), fine, chain-like sculpture of the body whorl ( H ), ventral ( I ) and frontal ( J ) surface of the body whorl. Measurements (in mm). H = 0.52-0.55, D = 0.7-0.75, H/D*100 = 73.3-77.1 ( n = 3: JG12), RUD = 28.2-28.8 ( n = 3). Etymology. The subspecific name Angustopila uninodus (one node) refers to the single palatal denticle of this subspecies, instead of the two palatal teeth of the nominotypical subspecies. Distribution. This subspecies is known from three nearby localities in Bolikhamsay Province, Laos. The type locality of the nominotypical subspecies is located on a mountain ca. 14 km to the southeast (Fig. 64 ).