zoosystema 2018 40 3 Four new cyclophoroid species from Thailand and Laos (Gastropoda: Caenogastropoda: Alycaeidae, Diplommatinidae, Pupinidae) Barna PÁLL-GERGELY & András HUNYADI art. 40 (3) — Published on 13 February 2018 www.zoosystema.com DIRECTEUR DE LA PUBLICATION : Bruno David Président du Muséum national d’Histoire naturelle RÉDACTRICE EN CHEF / EDITOR-IN-CHIEF : Laure Desutter-Grandcolas ASSISTANTS DE RÉDACTION / ASSISTANT EDITORS : Anne Mabille ([email protected]), Emmanuel Côtez MISE EN PAGE / PAGE LAYOUT : Anne Mabille COMITÉ SCIENTIFIQUE / SCIENTIFIC BOARD : James Carpenter (AMNH, New York, États-Unis) Maria Marta Cigliano (Museo de La Plata, La Plata, Argentine) Henrik Enghoff (NHMD, Copenhague, Danemark) Rafael Marquez (CSIC, Madrid, Espagne) Peter Ng (University of Singapore) Gustav Peters (ZFMK, Bonn, Allemagne) Norman I. Platnick (AMNH, New York, États-Unis) Jean-Yves Rasplus (INRA, Montferrier-sur-Lez, France) Jean-François Silvain (IRD, Gif-sur-Yvette, France) Wanda M. Weiner (Polish Academy of Sciences, Cracovie, Pologne) John Wenzel (The Ohio State University, Columbus, États-Unis) COUVERTURE / COVER : Shells of Dicharax caudapiscis n. sp. (holotype). 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In USA, contact the Copyright Clearance Center, 27 Clearance Center, 27 Congress Street, Salem, Massachusetts 01970. Congress Street, Salem, Massachusetts 01970. Four new cyclophoroid species from Thailand and Laos (Gastropoda: Caenogastropoda: Alycaeidae, Diplommatinidae, Pupinidae) Barna PÁLL-GERGELY Plant Protection Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, Herman Ottó street 15, Budapest, H-1022 (Hungary) [email protected] (corresponding author) András HUNYADI Adria sétány 10G 2/5, Budapest 1148 (Hungary) [email protected] Submitted on 22 June 2017 | Accepted on 26 October 2017 | Published on 13 February 2018 urn:lsid:zoobank.org:pub:1B3E0AE7-2EEE-4C6A-B408-955B5695D82E Páll-Gergely B. & Hunyadi A. 2018. — Four new cyclophoroid species from Thailand and Laos (Gastropoda: Cae- nogastropoda: Alycaeidae, Diplommatinidae, Pupinidae). Zoosystema 40 (3): 59-66. https://doi.org/10.5252/zoosys- tema2018v40a3. http://zoosystema.com/40/3 ABSTRACT Th is paper describes four new species, namely Dicharax caudapiscis n. sp., Dicharax stuparum n. sp. (both family Alycaeidae Blanford, 1864), Pseudopomatias caligosus n. sp. (family Pupinidae L. Pfeiff er, 1853) and Arinia (Notharinia) boucheti Páll-Gergely, n. sp. (family Diplommatinidae Benson, 1849). KEY WORDS Th e fi rst three were recently collected in northern Th ailand, whereas the latter one was collected in Prosobranchia, operculate land snails, Laos by Edmond Saurin, and later also found in the collection of the Muséum national d’Histoire new species. naturelle, Paris. RÉSUMÉ Quatre nouvelles espèces de cyclophoroides de Th ailande et du Laos (Gastropoda: Caenogastropoda: Alycaeidae, Diplommatinidae, Pupinidae). Cet article décrit quatre espèces nouvelles, Dicharax caudapiscis n. sp., Dicharax stuparum n. sp. (toutes deux issues de la famille Alycaeidae Blanford, 1864), Pseudopomatias caligosus n. sp. (famille Pupinidae L. Pfeiff er, 1853) and Arinia (Notharinia) boucheti Páll-Gergely, n. sp. (famille Diplom- MOTS CLÉS matinidae Benson, 1849). Les trois premières ont été récemment collectées au Nord de la Th ailande, Prosobranchia, operculate land snails, alors que la dernière fut collectée au Laos par Edmond Saurin, et retrouvée dans les collections du espèce nouvelle. Muséum national d’Histoire naturelle, Paris. ZOOSYSTEMA • 2018 • 40 (3) © Publications scientifi ques du Muséum national d’Histoire naturelle, Paris. www.zoosystema.com 59 Páll-Gergely B. & Hunyadi A. INTRODUCTION ethanol. Shells and radula were directly observed without coat- ing under a low vacuum SEM (Miniscope TM-1000, Hitachi Terrestrial molluscs are either pulmonate or operculate snails High-Technologies, Tokyo). Th e nomenclature of the alycaeid (former Prosobranchia). While the latter group is represented in shell follows Páll-Gergely et al. (2017; see fi gs 1A, B therein). the temperate region with few species compared to pulmonates, We used the following type specimens for comparisons: in the tropics they can attain up to 50% of land snail diversity Dicharax (?) ellipticus Páll-Gergely, 2017: RMNH 5004014 (Neubert 2009). Operculate groups tend to have more highly (holotype); Dicharax (?) abdoui Páll-Gergely, 2017: MNHN- fragmented population structures and consequently, a higher IM-2012-27329 (holotype); Dicharax canaliculatus (von degree of endemism. Furthermore, operculate snails generally Moellendorff , 1894): SMF 109468 (lectotype), SMF 109469 have a narrower ecological tolerance, which, together with their (paralectotypes); Dicharax microdiscus (Möllendorff , 1887): limited distributional areas, makes them more vulnerable to SMF 109496 (lectotype), SMF 109497 (paralectotypes); habitat destruction, than pulmonate snails (Schilthuizen et al. Dicharax parvulus (Möllendorff , 1887): SMF 109507 (lecto- 2002). Th e land snail fauna of Southeast Asia has been most type), SMF 109508 (paralectotypes). Other Dicharax species intensively studied at the end of the 19th, and the beginning are not similar to the new species, and therefore, no compari- of the 20th Century. Kobelt (1902) compiled all terrestrial sons are necessary. operculate species known at that time, but since then, there has been no such attempt to collate all our knowledge into ABBREVIATIONS one place. Although recent investigations resulted in syste matic Institutions revisions of some operculate genera (e.g., Kongim et al. 2013; HNHM Hungarian Natural History Museum, Budapest; Páll-Gergely et al. 2015, 2017), most species have not been MNHN Muséum national d’Histoire naturelle, Paris; NHM Th e Natural History Museum, London; mentioned in the scientifi c literature since those descriptions. NHMUK When citing NHM registered specimens; Consequently, the majority of Southeast Asian terrestrial oper- RMNH National Museum of Natural History Naturalis, Leiden; culate snails are not suffi ciently illustrated, and our knowledge SMF Senckenberg Forschungsinstitut und Naturmuseum, on their intraspecifi c morphological variability, distribution, Frankfurt am Main. habitat preference, etc. is very limited. Th is results in dif- fi culties in species identifi cation, not to mention the proper Private collection description of new species. coll. HA Collection András Hunyadi, Budapest; In the present paper we describe four new species of terrestrial coll. PGB Collection Barna Páll-Gergely, Mosonmagyaróvár. operculate snails from Th ailand and Laos. Namely, an Arinia (Notharinia) Vermeulen, Phung & Truong, 2007, two Dicha- Measurements rax Kobelt & Möllendorff , 1900, and a Pseudopomatias Möl- D shell diameter; lendorff , 1885. All species of the subgenus Arinia (Notharinia) H shell height. have been described recently and illustrated suffi ciently in the original descriptions (Vermeulen et al. 2007; Maassen 2008; SYSTEMATICS Marzuki & Foon 2016). Th us, the specimens found in the Muséum national d’Histoire naturelle, Paris, can be properly Family ALYCAEIDAE Blanford, 1864 distinguished from the already known congeners. Th e descrip- tion of the new Pseudopomatias species is possible because the Genus Dicharax Kobelt & Möllendorff , 1900 genus has recently been revised (Páll-Gergely et al. 2015), and additional information was published subsequently (Páll-Gergely Dicharax Kobelt & Möllendorff , 1900: 186. 2016). Descriptions of the two new Dicharax species is possible TYPE SPECIES. — Alycæus hebes Benson, 1857, by subsequent desi- because during the genus-level revision of the family,