甘肃陆生贝类二新种(前鳃亚纲:中腹足目:环口螺科)  

TWO NEW SPECIES OF LAND SNAILS FROM GANSU PROVINCE,CHINA (PROSOBRANCHIA:MESOGASTROPODA: CYCLOPHORIDAE)

作　　者：陈德牛[1] 张国庆[1] 王洪建[2] 

机构地区：[1]中国科学院动物研究所,北京100080 [2]甘肃白水江国家级自然保护区管理局,甘肃746400

出　　处：《动物分类学报》2002年第2期221-224,共4页Acta Zootaxonomica Sinica

基　　金：国家自然科学基金资助项目 (编号 39970 115 ) ;中国科学院分类区系学科发展特别支持费资助项目

摘　　要：1998年 4～ 5月作者在甘肃省南部地区考察 ,获得陆生贝类标本一批 ,经鉴定发现 2新种 ,即大河腹皱螺Gastroptychiadahensissp .nov .和清河倍唇螺Diplommatinaqinghensissp .nov .,隶属于前鳃亚纲、中腹足目、环口螺科、腹皱螺属、倍唇螺属。文中对新种形态特征、栖息环境进行了记述 ,并与近似种作了比较。This paper deals with two new species of Cyclophoridae collected from Gansu Province, China. Type specimens are deposited in the Institute of Zoology,Chinese Academy of Sciences.1 Gastroptychia dahensis sp. nov. (Figs. 1 2) Holotype.Alt. 2 15?mm, diam. 1 10?mm; alt. of aperture 0 75?mm, diam. of aperture 0 75?mm. Paratypes 35 specimens. Alt. 2 00 2 35?mm, diam. 1 10 1 15?mm; alt. of aperture 0 65 0 80?mm, diam. of aperture 0 70 0 80?mm. Type specimens were collected from Dahe Forestry Station, Dangchang County (34°0′N, 104°3′E), Gansu Province, China, 8 May 1998. Shell very small, sinistral, thin, lustrous, semitransparent, pupa formed 512, moderately convex, with high spiral part, the penultimate whorl very convex. Shell light yellowish brown, surface with some oblique rib stria and growing lines. The protoconch smooth but dull. Aperture circular, thick, with two lips, somewhat expanded and turning over, and with small nipple formed columellar fold. Operculum circular, cuticular, translucent, light yellowish brown, and with a somewhat eccentric nucleus and few indistinct whorls. 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 15?mm, diam 1 10?mm; length of aperture 0 75?mm, diam. of aperture 0 75?mm. Aperture circular, thick, with two lips, somewhat expanded and turning over, and with small nipple formed columellar fold. The latter species with length 6 50?mm, diam. 2 50?mm; length of aperture 1 00?mm, diam. of aperture 1 00?mm, and with a palatine fold superior in the penultimate whorl. Peristome intermediate incrassate, anfractuous. 2 Diplommatina qinghensis sp. nov. (Figs. 3 4) Holotype.Alt. 1 45?mm, diam. 0 75?mm; alt. of aperture 0 55?mm, diam. of aperture 0 50?mm. Paratypes 13 specimens. Alt. 1 10 1 50?mm, diam. 0 60 0 80mm; alt. of aperture 0 35 0 55mm, diam. of

关 键 词：甘肃 陆生贝类 新种 前鳃亚纲 中腹足目 环口螺科 腹皱螺属 倍唇螺属 

分 类 号：Q959.212[生物学—动物学]