BULLETIN of the FLORIDA STATE MUSEUM Biological Sciences VOLUME 29 1983 NUMBER 3 NON-MARINE MOLLUSKS OF BORNEO II PULMONATA: PUPILLIDAE, CLAUSILIIDAE III PROSOBRANCHIA: HYDROCENIDAE, HELICINIDAE FRED G. THOMPSON AND S. PETER DANCE UNIVERSITY OF FLORIDA GAINESVILLE Numbers of the BULLETIN OF THE FLORIDA STATE MUSEUM, BIOLOGICAL SCIENCES, are published at irregular intervals. Volumes contain about 300 pages and are not necessarily completed in any one calendar year. OLIVER L. AUSTIN, JR., Editor RHODA J . BRYANT, Managing Editor Consultants for this issue: JOHN B. BURCH WILLIAM L. PRATT Communications concerning purchase or exchange of the publications and all manuscripts should be addressed to: Managing Editor, Bulletin; Florida State Museum; University of Florida; Gainesville, FL 32611, U.S.A. Copyright © by the Florida State Museum of the University of Florida This public document was promulgated at an annual cost of $3,040.00 or $3.04 per copy. It makes available to libraries, scholars, and allinterested persons the results of researches in the natural sciences, emphasizing the circum-Caribbean region. Publication dates: 8-15-83 Price: 3.10 NON-MARINE MOLLUSKS OF BORNEO II PULMONATA: PUPILLIDAE, CLAUSILIIDAE III PROSOBRANCHIA: HYDROCENIDAE, HELICINIDAE FRED G. THOMPSON AND S. PETER DANCEl ABSTRACT: The Bornean land snails of the families Pupillidae, Clausiliidae, Hydrocenidae, and Helicinidae are reviewed based on collections from38 localities in Sarawak and Sabah and on previous records from the island. The following species are recorded: PUPILLIDAE- Pupisoma orcula (Benson), Costigo putuiusculum (Issel) new combination, Costigo molecul- ina Benthem-Jutting, Nesopupa moreleti (Brown), N. malayana Issel; Boysidia (Dasypupa) salpimf new subgenus and species, B. (D.) paini new species. The following Malayan species are referred to the subgenusDasypupa: B. (D.) terae (Tomlin), B. (D.) megaphona (Benthem- Jutting), B. (D.) elephas (Benthem-Jutting), and B. (D.) perigyra (Benthem-Jutting). CLAU- SILIIDAE: Phaedusa borneensis (Pfr.), P. fiticostata stenotrema new species. HYDROCE- NIDAE : Georissa bangueuensis ,Smith, G. borneensis Smith, G el)€Tetti Smith, G. gomanto- nensis Smith, G. hosei Godwin-Austen, G. kobelti Gredler, G. niahensis Godwin-Austen, G sat,lae (Benthem-Jutting) new combination, G. scalinella (Benthem-Jutting) new combina- tion, G. similis Smith, G. williamsi Godwin-Austen, G. hadra new species, G. pyrrhoderma new species, and G. xesta new species. Names placed in synonymy include G. flauescens Smith (= G. gomantonensis) and G. hungerfordi Godwin-Austen (= G. wiltiamsi). No HELI- CINIDAE were collected. Species previously recorded from the island are listed. RE:SUMEN: Los caracoles terrestres de Borneo, pertenecientes a las familias Pupillidae, Clausiliidae, Hydrocenidae y Helicinidae fueron revisados en base a colecciones de 38 localidades en Sarawak y Sabah, am' como a registros previos de la isla. So registraron las siguientes especies: PUPILLIDAE: Pupisoma orcula (Benson), Costigo puluiusculum (Issel) nueva combinaci6n, Costigo.moleculina Benthem-Jutting, Nesopupa moreleti (Brown), N. malayana Issel; Bousidia (Dasypupa) salpinx nuevo subglnero y especie, B. (D.) paini nueva especie. Las siguientes especies malayas se refieren al subgdnero Dasypupa: B. (D.) terae (Tomlin), B. (D.) megaphona (Benthem-Jutting), B. (D.) elephas (Benthem-Jutting) y B, (D.) perigyro (Benthem-Jutting). CLAUSILIIDAE: Phaedusa borneensis (Pfr.), P. filicostata stenotrema nueva especie. HYDROCENIDAE: Georissa banguegensis Smith, G. borneensis Smith, G. €©efetti Smith, G. gomantonensis Smith, G. hosei Godwin-Austen, G. kobelti Gredler, G. niahensis Godwin-Austen, G. sat,lae (Benthem-Jutting) nueva combinaci6n, G. scalinello (Benthem-Jutting) nueva combinacidn, G. similis Smith, G. williamsi Godwin- Austen, G. hadra nueva especie, G. pyrrhodenna nueva especie y G. xesta nueva especie. Nombres ubicados en sinonimia incluyen G. flavescens Smith (=G. gomantonensis) y G hungerfordi Godwin-Austen (= G. wiUiamsi). No se colectaron especimenes de HELI- CINIDAE. Se mencionan especies previamente registradas en la isla. TABLE OF CONTENTS Introduction .......... ..102 Acknowledgements .... ... 102 II Pulmonata Pupillidae.......... .103 Clausilliidae ......... 109 1 Dr. Thompson is Curator in Malacology at the Florida State Museum, University of Florida, Gainesville, FL32611 U.S. A. Dr. Dance is at South Bank House, Broad Street, Hay-on-Wye (via Hereford) HR3 5DB, United Kingdom. THOMPSON, F. G. and S. P. DANCE. 1983. Non-Marine Mollusks of Borneo. II Pulmonata: Pupillidae, Clausiliidae. III Prosobranchia: Hydrocenidae, Helicinidae. Bull. Florida State Mus., Biol. Sci. 29(3):101-152. 102 BULLETIN FLORIDA STATE MUSEUM Vol. 29, No., 3 III Prosobranchia, Archeogastropoda Hydrocepidae ...,....... ......... 112 Helicinidae.................... ... 128 Literature Cited ..................... .. ....129 INTRODUCTION In 1970 the first of a projected series of papers was published on mollusks of Borneo (Dance 1970), based upon collections made by Dr. G. E. Wilford and his associates of the Geological Survey, Malaysia. It dealt with the Streptaxidae. This paper, comprising parts II and III of the sefies, covers two families of Pulmonata as well as the Archeogastropoda. The land snail fauna of Borneo is poorly known, even though more than 350 species have been reported from the island (Martens 1908, Solem 1964). The majority of the species recorded are endemic and have been collected in Sarawak, Brunei, and Sabah, an area comprising about a third of the island. The southern portion, Kalimantan, is virtually unknown malacolog- ically, except for a few species collected randomly at coastal localities by travelers. Many species have been recorded from the island only once, and their original descriptions frequently lack important diagnostic details. Few distributional data have been available, and many species have been reported merely from "Borneo." The collections on which the present studies are based originated from the same places in northern Borneo from which most species have been recorded previously (Fig. 1). These collections are rich in small or minute taxa that usually frequent limestone, and most are abundantly represented (Dance 1970:149-150). Larger species, such as the Cyclophoridae, Camae- nidae, and Bradybaenidae, are poorly represented, and our material of these does not constitute a major addition to the known fauna. Almost all of our material consists of dried shells. No live specimens were preserved for anatomical studies. As was anticipated, our material contains many new taxa. On the other hand many taxa previously recorded from Borneo are missing from our material. From this we estimate that less than 25% of the Bornean fauna is known. Our accounts of particular families list all species recorded from Borneo and satellite islands to facilitate future investigations by other workers. ACKNOWLEDGEMENTS We are grateful to the following people who have helped us in various ways. Dr. Alan Solem (Field Museum of Natural History), Dr. Ronald Janssen (Senckenbergischen Naturfor- schenden Gesellschaft) and Dr. Fred Naggs (British Museum, Natural History) loaned speci- mens essential to this report. Mr. Terrence E. Crowley compared specimens from our material with types in the British Museum (Natural History). Dr. F. E. Loosjes, Wageningen, 1983 THOMPSON AND DANCE: BORNEAN NON-MARINE MOLLUSKS 103 Netherlands, compared relevant specimens of Clausiliidae. Kurt Auffenberg, Florida State Museum, helped prepare illustrations and performed numerous other minor but essential tasks. The excellent drawings of Boysidia were made by Wendy Zomlefer, Staff Illustrator, Florida State Museum. Micrographs of hydrocenid shells were made by Kurt Au ffenberg with an HITACHI 5-415A scanning electron microscope in the Department of Zoology, University of Florida. II PULMONATA PUPILLIDAE The classification used in this paper follows Pilsbry (1927:vii-xii) and Baker (in Pilsbry 1935:191-209). Thiele (1931:503-514) disregarded name priorities and used VERTIGINIDAE Stimpson 1851 to replace PUPILLI- DAE Turton 1831. Zilch (1959:146-174), who rearranged the pupillid gen- era among five families on the basis of shell characteristics, employed a different nomenclature for family and subfamily units. NESOPUPINAE STEENBERG 1925 Pupisoma orcula (BENSON) This widely distributed species has not been reported from Borneo previously. It was found at the following stations. SABAH: Kinabatangan Valley, Batu Tumanggong Besar, 1 mi downstream from Sakau, 05°34'N, 118°20'E, (UF 35936). SARAWAK: First Div., Bau area, Gunong Kapor (UF 35933); First Div. S of Serian, Gunong Selabor, 00°55'N, 110°25'E, (UF 35939, 35931); Fourth Div. SW of Marudi, Beluru area, Bukit Vrong, 04°00'N, 114°12'E, (UF 35932); Fourth Div., Lower Tutoh Valley, nr. Gunong Mulu; Melinau Paku Cave, 04°03'N, 114°48'E, (UF 35935); Fourth Div., Lower Tutoh Valley, nr. Gunong Mulu, small hill towards headwaters of Melinau Paku Riv., 04°03'N, 114°48'E, (UF 35934); Fourth Div., Lower Tutoh Valley, nr. Gunong Mulu, junct. Melinau Riv. and Melinau Paku Riv. (UF 35937); Fourth Div., small hill N of lower Melinau Riv. 04°03' N, 114°48'E, (UF 35938); Fourth Div., Tatau Valley, Bukit Sarang, 02°45'N, 113°02'E, (UF 35929); Fifth Div., Gunong Budah, Meda- lam Valley, trib. to Limbang Riv., 04°08'N, 115°05'E, (UF 35930). Costigo pull,isculum (Issel) Helix pulvisculum Issel 1874; Ann. Mui Civ. Stor. Nat. Genova 6:406; pl. 5, figs.