中国陆生贝类二新种记述(肺螺亚纲 柄眼目 虹蛹螺科 喇叭螺属)

笔者于１９９７年８～９月在贵阳地区进行了陆生贝类资源调查，获得陆生贝类标本一批。经鉴定发现２新种，即水田坝贝喇叭螺新种Ｂｏｙｓｉｄｉａ（Ｂｅｎｓｏｎｅｌａ）ｓｈｕｉｔｉａｎｂａｅｎｓｉｓｓｐ．ｎｏｖ．，贵阳喇叭螺新种Ｂｏｙｓｉｄｉａ（Ｂｏｙｓｉｄｉａ）ｇｕｉｙａｎｇｅｎｓｉｓｓｐ．ｎｏｖ．，本文对２新种的形态进行了详细描述，并对近似种进行了比较。

TWO NEW SPECIES OF THE TERRESTRIAL MOLLUSKS FROM CHINA

In the presen paper,two new species of Pupillidae is described.The material studied were collected by author from Guizhou Province,China,in September 13～15,1997.Type specimens are deposited in the Institute of Zoology, Academia Sinica.1. Boysidia (Boysidia) guiyangensis sp.nov.(Figs.1,a,b,c,)Holotype length 175 mm,breadth 131 mm;length of aperture 075 mm,breadth of aperture 069 mm;Collected from Longjinwan twon,Guiyang City(26°0′N,106°7′E),Guizhou Province,China,in September 131997Paratype 10 specimens,length 175～200 mm,breadth 125～163 mm;length of aperture 069～094 mm,breadth of aperture 069～094 mm;Collected with the holotype.Shell small.thick,lustre,long conic.Whorls 4 1/2,moderately convex.Shell about 175～200 mm high and 125～163 mm wide.Spire long-conical.Shell light yellow brown in colour,and with inregularly and weakly striatulatespiral line and growth line.Apex blunt, suture deeply. Aperture separation from body whorl,oval,lip expanded and reflexed,with 9 toothed; l large nipple-form angular lamella,l big parietal lamella,l small nipple-form infraparietal lamella and l nipple-form columellar lamella,l big flake-form infrapalatal folds,l small lower palata folds and l upper palatal folds,l nipple-form suprapalatal folds; Umbilicus big,cavernous-form.This new species very closely resembles Boysidia (Boysidia) hunana (Gredler,1881),but differs from the latter by the shells with 6～6 1/2 whorls(length 175 mm,breadth 125 mm)in the small size,with 5 palatal folds, 3 small parietal lamellae.2.Boysidia (Bensonella) shuitianbaensis sp.nov.(Figs.2,a,b,c)Holotype length 306 mm,breadth 1.67 mm;length of aperture l.ll mm,breadth of aperture 1.00 mm;Collected from Shuitianba twon (26°7′N,106°8′E),Guiyang City,Guizhou Province, China,in September 14,1997.Paratype 44 specimens,length 244～350 mm,breadth 135～194 mm;length of aperture 100～117 mm,breadth of aperture 089～111 mm;Collected with the holotype.Shell small,thick,lustre,circullar cone-form.Whorls 4～5 1/2,moderetely convex,with high spiral part.Shell chestnut-brown in colour,and with spiral line and growth line.Suture deeply,Apex blunt.Aperture oval,oblique.Lip expanded and reflexed,with 4 milky white tooth,angular and perietal lamellae united into one large flake-form palatal folds,l small nipple-form upper palatal folds;l small lower palatal folds; l large flake-form columellar lamella on margin of columella.Umbilicus big, cavernous-form.This new species very closely resembles Boysidia (Bensonella) plicidens (Benson,1849),but fissers from the latter by the shells with 5 whorls(length 200 mm,breadth 150 mm)in the small size,with 9 palatal folds,3 parietal lamellae.