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 sp. 1 Material examined. Laos • 1 shell; Luang Prabang Province , 3.1 km from centre of Nong Khiaw towards Pak Xeng , Tham Pha Toke , around the cave (locality code: 2019/114); 20°33.22'N , 102°37.72'E ; 345 m a.s.l. ; 5 Oct. 2019 ; A. Hunyadi leg.; coll. HA . Measurements (in mm). H = 0.91, D = 0.87, H/D*100 = 104.6, RUD = 29.5. Differential diagnosis. The single shell is similar in size, shape, and arrangement of the teeth to A. tweediei sp. nov., but differs in the ovate aperture, the weaker teeth and thinner peristome. More material is needed to examine whether these differences are constant and sufficient for species-level distinction. Distribution. Known from a single site only (Fig. 55 ).