拟小豆螺属一新种记述(中腹足目,盖螺科)  

A NEW SPECIES OF PSEUDOBYTHINELLA(MESOGASTROPODA,POMATIOPSIDAE)FROM CHINA

作　　者：程由注[1] 吴小平[2] 李莉莎[1] 

机构地区：[1]福建省疾病预防控制中心,福州350001 [2]南昌大学生命科学院,南昌330031

出　　处：《动物分类学报》2007年第4期896-899,共4页Acta Zootaxonomica Sinica

基　　金：国家自然科学基金(30460043);国家科技部自然资源平台项目(2005DK21104)资助.

摘　　要：报道了采自福建三明的拟小豆螺属1新种,唐氏拟小豆螺Pseudobythinella tangi sp.nov.,并与近似种建欧拟小豆螺比较。该种螺为罕见医学贝类物种,为斯氏并殖吸虫第1中间宿主。Pseudobythinella（Hydrobiidae）was described by Liu（1979）with type species collected from Fujian Province,China.Based on the shell and anatomy data,Davis（1985）put all the species of Pseudobythinella distributed in China into the Family Pomatiopsidae.Up to now,four species of Pseudobythinella have been discovered in China.The present paper deals with a new species of Pseudobythinella tangi from Fujian Province,China.All the type specimens are deposited in Fujian Provincial Center for Disease Control and Prevention.Pseudobyaanella tangi sp. nov. （Figs. 1, 3-4） Shells are minute, thin, ranging in height from 1.54-1.64 ram. They are conic-shaped with 3 1/2 whorls. Whorls increase gently in width. Body whorl and penultimate whorl increase rapidly in height. Body whorl is obviously expended. Apex obtuse, shell thin with light gray or yellow-brown color, juvenile with light color and adult darker. Weak growth lines are on shell surface. The eye spots on head are visible through the shell, suture distinct. Aperture is ovate, peristome continous and with dark surrounding. Umbilicus is narrow and small behind the columeUa edge. Operculum elongate oval, comeous, thin, transparent, and with unconspicuous spiral line. Near the middle of inner lip, a jag divides the lip into two pieces of ridged teeth. The penis is curved finger-shape,d, lie on the dorsa of neck. Radula has seven rows teeth. The most commonly encountered cusp fon＇nula＇is （4·-1-1）/（1-2）·2-1 - 4· 19 - 22· 13 - 15. Central teeth have 9 cusps and two pieces of denfiform basocones on each side of the base, and there are two basocones on the tongue of central teeth. Later teeth have 9 cusps. The inner marginal teeth average 19-22 cusps, while outer marginal teeth dearly have fewer, an average of 13-15. l_xxality and habitat. Type locality of the new spedes is in Qianchun Village, suburb of Sanming City, Fujian Province （ 26° 08＇ N, 117° 40＇ E ）. SNails were collected from a small ditch with water flowing from seepage. Botto

关 键 词：a 盖螺科 拟小豆螺属 新种 医学贝类 

分 类 号：Q959[生物学—动物学]