中国沟螺属一新种记述(前鳃亚纲,中腹足目,环口螺科)  

A NEW SPECIES OF THE GENUS DIORYX BENSON FROM CHINA(PROSOBRANCHIA, MESOGASTROPODA, CYCLOPHORIDAE)

作　　者：胡自强[1] 银海强[1] 陈德牛[2] 

机构地区：[1]湖南师范大学生命科学学院,长沙410081 [2]中国科学院动物研究所,北京100080

出　　处：《动物分类学报》2004年第4期704-705,共2页Acta Zootaxonomica Sinica

基　　金：国家自然科学基金资助项目 (39970 1 1 5);香港嘉道理农场暨植物园奖学金资助

摘　　要：在整理广东省乳源县乳阳保护站陆生贝类标本时 ,经鉴定发现 1新种 ,即乳阳沟螺Dioryxruyangensissp .nov.。记述了新种形态特征、栖息环境 ,并对其近似种进行了讨论。This paper deals with a new species of the genus Dioryx collected from Guangdong Province, China. Type specimens are deposited in the Institute of Zoology, Chinese Academy of Sciences, China.Dioryx ruyangensis sp. nov. (Figs.1-2) Holotype(Unit:mm). Alt. 7.10, diam. 5.50; Alt. of aperture 1.75, diam. of aperture 1.75; collected from Ruyang Town, Ruyuan County(24°7′N, 113°2′'E), Guangdong Province, China, 28 Apr. 2002. Paratypes 12 specimens. alt. 6.13-7.50, diam. 4.75-5.60; alt. of aperture 1.36-2.88, diam. of aperture 1.38-2.88; collected from Ruyang Town, Ruyuan County, Guangdong Province, China,28 Apr. 2002. Shell small, dextrorotary, thick, lustrous, lustreless, globose conoid. Whorls 4-412, moderately convex, with high spiral part, body whorl very convex. Shell yellowish in colour, surface very rough and with vertically some rib-stria, and the protoconch smooth but dull. Apex blunt, suture deep. Aperture circular, thick, with two lips, somewhat expanded and reflexed, and with a 2.80mm wormform projection at the suture of body whorl. Operculum circular, yellow brown in colour, and the inner surface has a papule-form projection, and with 3 concentric circles lines. Umbilicus small, crevice-formed. This new species is similar to Dioryx globulus(Moellendorff, 1885)but differs obviously from the latter in the small size; the shell with whorls 4-412, length 4.20mm, diam. 4.00mm; with a 2.80mm wormform projection at the suture of body whorl. The shell of the latter species with whorls 4, shell surface reddish brown, length 6.25mm, diam. 6.25mm., and with 2.50mm projection as wormform.

关 键 词：环口螺科 前鳃亚纲 中腹足目 近似种 记述 栖息环境 新种 形态特征 鉴定 保护 

分 类 号：Q959.212[生物学—动物学]