A NEW SPECIES OF LAND SNAIL FROM GUIZHOU PROVINCE,CHINA(PULMONATA,STYLOMMATOPHORA,CLAUSILIIDAE)

The present paper describes a new species of the genus Euphaedusa Borttger, 1877: Euphaedusa libonensis sp. nov. The materials were collected by the authors from cave in Guizhou Province, China in 2001. Type specimens are deposited in the Institute of Zoology, Chinese Academy of Science, Beijing.Euphaedusa libonensis sp. nov. (Figs.1-3) Holotype, alt. 12.82?mm, diam. 2.62?mm; alt. of aperture 2.40?mm, diam. of aperture 1.90?mm; collected from Dongbeidong, Libo County (25°4′N, 107°8′E),Guizhou Province, China,8 July 2001. Paratypes 4 specimens,alt. 12.80-13.92?mm, diam. 2.62-2.97?mm; alt. of aperture 2.13-3.00?mm, diam. of aperture 1.75-2.13?mm; collected with holotype, 8 July 2001. Shell small, dextran, slightly thick, lustrous, non-transparent, long fusiform. Whorls 1012, moderately convex, spire high, spiral part, high tower-form, Apex blunt and the protoconch and 2 12whorls generally smooth, deeply sutured.The surface of shell dark-brown or yellowish brown in colour, and with very fine and somewhat distinct, dense, striated, coarse, oblique ribs. The aperture small, pear-shaped, the peristome continuous, thick, rather broadly reflexed. The slightly enlarged lamella superior and slender lamella inferior are visible at aperture. The slender long suturalis plica, a short palatal plica, a short principa plica, a short palatalis superior plica and a short lunar plica are visible at the right side of the body whorl. The new species is similar to Euphaedusda hunkonens Chen and Zhang, 1999, but differs obviously from the latter in the following characters: the shells dextran, with 1012, whorls (alt. 12.80-13.92?mm, diam. 2.62-2.97?mm; alt. of aperture 2.13-3.00?mm, diam. of aperture 1.75-2.13?mm), small. Apex blunt. The slightly big lamella superior and slender lamella inferior are visible at the aperture. The slender, long suturalis plica, a short palatal plica, a short principa plica, a short palatalis superior plica and a short lunar plica are visible at the right side of the body whorl. The latter's shell has 9 12A NEW SPECIES OF LAND SNAIL FROM GUIZHOU PROVINCE,CHINA(PULMONATA,STYLOMMATOPHORA,CLAUSILIIDAE)$$$$ LI Dao-Hong 1, LUO Tai-Chang 1, CHEN De-Niu 2 1.Department of Biology, Guizhou Normal University, Guiyang 550001 2.Institute of Zoology, Chinese Academy of Sciences, Beijing 100080 Abstract The present paper describes a new species of the genus Euphaedusa Borttger, 1877: Euphaedusa libonensis sp. nov. The materials were collected by the authors from cave in Guizhou Province, China in 2001. Type specimens are deposited in the Institute of Zoology, Chinese Academy of Science, Beijing.Euphaedusa libonensis sp. nov. (Figs.1-3) Holotype, alt. 12.82?mm, diam. 2.62?mm; alt. of aperture 2.40?mm, diam. of aperture 1.90?mm; collected from Dongbeidong, Libo County (25°4′N, 107°8′E),Guizhou Province, China,8 July 2001. Paratypes 4 specimens,alt. 12.80-13.92?mm, diam. 2.62-2.97?mm; alt. of aperture 2.13-3.00?mm, diam. of aperture 1.75-2.13?mm; collected with holotype, 8 July 2001. Shell small, dextran, slightly thick, lustrous, non-transparent, long fusiform. Whorls 1012, moderately convex, spire high, spiral part, high tower-form, Apex blunt and the protoconch and 2 12whorls generally smooth, deeply sutured.The surface of shell dark-brown or yellowish brown in colour, and with very fine and somewhat distinct, dense, striated, coarse, oblique ribs. The aperture small, pear-shaped, the peristome continuous, thick, rather broadly reflexed. The slightly enlarged lamella superior and slender lamella inferior are visible at aperture. The slender long suturalis plica, a short palatal plica, a short principa plica, a short palatalis superior plica and a short lunar plica are visible at the right side of the body whorl. The new species is similar to Euphaedusda hunkonens Chen and Zhang, 1999, but differs obviously from the latter in the following characters: the shells dextran, with 1012, whorls (alt. 12.80-13.92?mm, diam. 2.62-2.97?mm; alt. of aperture 2.13-3.00?mm, diam. of apertur