中国沟颈螺属一新种记述(腹足纲:柄眼目:艾纳螺科)  

A NEW SPECIES OF THE GENUS HOLCAUCHEN FROM CHINA (GASTROPODA: STYLOMMATOPHORA: ENIDAE )

作　　者：陈德牛[1] 张国庆[1] 

机构地区：[1]中国科学院动物研究所,北京100080

出　　处：《动物分类学报》2000年第4期369-372,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：记述中国沟颈螺属 11种 ,其中包括 1新种 ,即芒康沟颈螺 ,HolcauchenmarkamensisChenetZhang ,sp .nov .,编制了分种检索表 ,对新种进行了描述 。Nowadays, the distribution areas of the genus Holcauchen Moellendorff are narrow. Most species of the genus are recorded from South Gansu,North Sichuan and South Shaanxi Provinces, China. The genus character follows Thiele (1931). In this paper, 11 species are discussed,including one new species. Keys to these species together with this, morphological description of the new species are also given. Type specimens are deposited in the Institute of Zoology, Chinese Academy of Sciences. Holcauchen markamensis Chen et Zhang,sp. nov. (Figs. 1 3) Holotype alt. 19.30?mm, diam. 3.40?mm, alt. of aperture 3.0?mm, diam. of aperture 2 1 mm. Collected from Chubalung Town (29°07'N, 99° E), Markam County, Xizang Autonomous Region, China, Aug. 13, 1982. Paratypes 22 specimens, among them, 4 specimens are young snails. alt. 17 1 19.9?mm, diam. 2.0 3.1?mm; diam. of aperture 1.9 2.5?mm, the same locality and date as holotype. Shell moderate, thick, lustrous, long cylindro turrited. Whorls 22 12, moderately convex, with spire long. Shell red brown in colour, surface with slightly striate and growth line. Apex blunt, suture deep. Aperture small, ovate subquadrate. The peristome white, very expanded, sharp, with a tooth like thickening on right body whorl. Umbilicus small. The new species differs from the closely related species Holcauchen clausiliaeformis (Moellendorff, 1901) in the smaller size of shell ( alt. 19.30?mm, diam. 3.40?mm, alt. of aperture 3.0?mm,diam. of aperture 2.1?mm), with whorls 22 12, and with a tooth like thickening on right body whorl. The latter with whorls 15 12, and lamella palatalis very remote.

关 键 词：腹足纲 柄眼目 艾纳螺科 沟颈螺属 芒康沟颈螺 

分 类 号：Q959.212[生物学—动物学]