中国弯螺属一新种记述(肺螺亚纲,柄眼目,扭轴蜗牛科)

A NEW SPECIES OF THE GENUS SINOENNEA FROM CHINA(PULMONATA,STYOMMATOPHORA,STREPTAXIDAE)

笔者在整理福建地区陆生贝类标本时,经比对鉴定发现1新种,即蛹形弯螺Sinoennea pupoidea sp.nov.。隶属肺螺亚纲、柄眼目、扭轴蜗牛科、弯螺属。对新种形态特征、栖息环境作了记述,并对其近似种也进行了讨论。

A new species of the genus Sinoennea is described in the present paper. The materials were collected in Fujian Province, China in 2008 by the authors. Type specimens are deposited in the Fujian Entry-Exit Inspection ＆ Quaratine Bureau, Fuzhou and the Institute of Zoology, Chinese Academy of Sciences, Beijing, China.Sinoennea pupoidea sp. nov. （Figs. 2-5）Holotype, alt. 2.94mm , diam. 1.68mm , alt of aperture 0.57mm , diam. of aperture 0.57mm , collected from Longkoutong Town, Longyan City （25.30°N, 117.16°E）, Fujian Province, China, 10 May 2008. Paratypes 57 specimens, alt. 2.80-3.00mm , diam. 1.66-1.74mm , alt of aperture 0.55-0.63mm , diam. of aperture 0.54-0.63mm , collected from Longkoutong Town, Longyan City （25.30°N, 117.16°E）, 10 May 2008, Lianhuashan Town, Longyan City （25.01°N, 117.05°E）, 11 May, 2008 and Tianmenshan Town,Wuyishan Nature Protection Areas （27.75°N, 117.65°E） , 16 July 2009, Yongtai County （25.87°N, 118.96°E）, 26 Apr. 2008, Fujian Province, China.Geographical distribution of Sinoennea pupoidea sp. nov is showed in Fig. 1.Shell small, thick, solid, smooth, lustrous, pupa-shaped. Whorls 512, moderately convex with high spiral part. Shell milk white or light yellow in colour, and with some curve vertically rib-stria, but the embryonic and second without rib-stria, smooth. Apex blunt and short, ovate, with deep suture. Aperture small, elliptical-shaped. The peristome thick, expanded and reflexed, with l big flake-shaped angular lamellar at inner lip, with two nipple-formed teeth in right lip, with 1 big nipple-formed tooth in columellar lip. Umbilicus small, cavernous.The new species fairly resembles Sinoennea fuzouensis （Zhou and Chen, 2006）, but differes from the latter by the shells with 512 whorls, （alt 2.94mm , diam. 1.68mm , alt of aperture 0.57mm ,diam. of aperture 0.57mm ） and with 1 big nipple-formed tooth in columellar lip. The latter shell with 712 whorls, （alt 5.17mm , diam. 2.57mm , alt of aperture 1.86mm ,diam. of aperture 1.48mm ） and without 1 big nipple-formed tooth in columellar lip.