贵州环口螺科一新种(前鳃亚纲:中腹足目:环口螺科)  

A NEW SPECIES OF CYCLOPHORIDAE FROM CHINA (PROSOBRANCHIA: MESOGASTROPODA: CYCLOPHORIDAE)

作　　者：罗泰昌[1] 陈德牛[2] 张国庆[2] 

机构地区：[1]贵州师范大学生物科学技术系,贵阳550001 [2]中国科学院动物研究所,北京100080

出　　处：《动物分类学报》2002年第1期50-52,共3页Acta Zootaxonomica Sinica

基　　金：国家自然科学基金资助项目 (编号 39970 115 )

摘　　要：1998年 7～ 8月作者在贵州南部地区考察 ,获得陆生贝类标本一批 ,经鉴定发现 1新种 ,即茂兰腹皱螺Gastroptychiamaolanensissp .nov .。隶属于前鳃亚纲、中腹足目、环口螺科、腹皱螺属。描述了新种形态特征、栖息环境 。This paper deals with a new species of Cyclophoridae collected from Guizhou Province. Type specimens are deposited in the Institute of Zoology, Chinese Academy of Sciences.Gastroptychia maolanensis sp. nov. (Figs.1-2) Holotype. Alt. 2.43*!mm, diam. 1.38*!mm; alt. of aperture 0.88*!mm, diam. of aperture 0.94*!mm; collected from Maolan Town, Libo County (25°3′N, 108°0′E), Guizhou Province, China, 12 July 1998. Paratypes 28 specimens. Alt. 2.31-2.50*!mm, diam. 1.31-1.44*!mm; alt. of aperture 0.75-1.60*!mm, diam. of aperture 0.88-1.06*!mm; collected from Maolan Town, Libo County (25°3′N, 108°0′E), Guizhou Province, China, 12 July 1998. Shell very small, a little thick, lustrous, pupa-formed. Whorls 6-612, moderately convex, with high spiral part, the primordial 1-2 whorls very convex. Shell yellowish brown, surface very rough and with some rib-stria, with 5 thick ribs at body whorl, and the protoconch smooth but dull. Aperture circular, thick, with two lips, somewhat expanded and turning over, and with a very small columellar marginal tooth. Operculum circular, cuticular, translucent, light yellowish brown. Umbilicus small. Apex blunt, suture deep. This new species fairly resembles Gastroptychia laurentiana (Moellendorff, 1885) but differs from the latter in having the small size: the shell with length 2.43*!mm, diam. 1.38*!mm; length of aperture 0.88*!mm, diam. of aperture 0.94*!mm. Whorls 6-612, surface very rough and with some rib-stria, and with a very small columellar marginal tooth. The latter species with length 6.50*!mm, diam. 2.50*!mm; length of aperture 1.00*!mm, diam. of aperture 1.00*!mm. Whorls 8, and with a palatine fold superior in the penultimate whorl. Peristome intermediate incrassate, anfractuous.

关 键 词：前鳃亚纲 中腹足目 环口螺科 腹皱螺属 新种 贵州 

分 类 号：Q959.212[生物学—动物学]