中国环口螺科二新种(前鳃亚纲:中腹足目:环口螺科)  

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

作　　者：冉景丞[1] 陈德牛[2] 张国庆[2] 

机构地区：[1]贵州茂兰国家级自然保护区 [2]中国科学院动物研究所

出　　处：《动物分类学报》1999年第3期281-284,共4页Acta Zootaxonomica Sinica

基　　金：国家自然科学基金

摘　　要：１９９７年８月作者在贵州南部地区考察，获得陆生贝类标本一批，经鉴定发现两新种，即荔波倍唇螺Ｄｉｐｌｏｍｍａｔｉｎａｌｉｂｏｅｎｓｉｓｓｐ．ｎｏｖ．和小七孔倍唇螺Ｄｉｐｌｏｍｍａｔｉｎａｘｉａｏｑｉｋｏｎｇｅｎｓｉｓｓｐ．ｎｏｖ．，隶属于前鳃亚纲、中腹足目、环口螺科、倍唇螺属。对新种形态特征、栖息环境进行了记述，并对其近似种也进行了讨论。This paper deals with two new species of Cyclophoridae collected from Guizhou Province. Type specimens are deposited in the Institute of Zoology, the Chinese Academy of Sciences.1 Diplommatina liboensis sp. nov. (Figs. 1 2) Holotype.Alt. 5.28mm, diam. 3.06mm ; Alt. of aperture 2.33mm , diam. of aperture 2.22mm ; collected from Xiaoqikong Town, Libo County (25°4′N, 107°8′E), Guizhou Province, August 13, 1997. Paratypes 87 specimens. Alt. 4. 58 5.30mm , diam. 2.33 3.10mm ; Alt. of aperture 1.83 2.50mm, diam. of aperture 1.11 2.22mm ; collected from Xiaoqikong Town, Libo County (25°4′N, 107°8′E), Guizhou Province, August 13, 1997. Shell very small, a little thick, lustrous, pupaformed. Whorls 712, moderately convex, with high spiral part, the primordial 12 whorls very convex. Shell yellowish brown, surface very rough and with some ribstria, and the protoconch smooth but dull. Aperture circular, thick, with two lips, somewhat expanded and turning over, and without a very small columellar marginal tooth. Operculum circular, cuticular, translucent, light yellowish brown. Umbilicus small. Apex blunt, suture deep. This new species fairly resembles Diplommatina lavillei Dautzenberg et Fischer, 1905, but differs from the latter in having the larger size: the shell with length 5 28mm , diam. 3 06mm ; length of aperture 2.33mm , diam. of aperture 2.22mm ., and without a very small columellar margin tooth. The latter species with length 4.30 mm, diam. 3.50 mm; length of aperture 1.50mm, diam. of aperture 1.50mm . 2 Diplommatina xiaoqikongensis sp. nov. (Figs. 1 2) Holotype.Alt. 2.17mm , diam. 1.17mm ; Alt. of aperture 0.67 mm , diam. of aperture 0.75mm ; collected from Xiaoqikong Town, Libo County (25°4′N, 107°8′E), Guizhou Province, August 13, 1997. Paratypes 68 specimens. Alt. 2.00 2.50mm , diam. 1.00 1.33mm ; Alt. of aperture 0.67 0.78mm , diam. of aperture 0.67 0.83mm

关 键 词：前鳃亚纲 中腹足目 环口螺科 倍唇螺属 新种 

分 类 号：Q959.212[生物学—动物学]