拟扁蛭属一新种(吻蛭目:舌蛭科)

ONE NEW SPECIES OF THE GENUS HEMICLEPSIS (RHYNCHOBDELLIDA:GLOSSIPHONIIDAE)

记述拟扁蛭属HemiclepsisVejdovsky 1884 1新种 ,即广东拟扁蛭Hemiclepsisguangdongensissp .nov .,新种区别于本属其它已知种的特征是 :眼 1对 ,位于背面第 4环 ;背面有许多不规则的皮肤乳突 ;身体共 67环 ;嗉囊盲囊 10对 ;精巢 6对。采自马来闭壳龟体表皮肤。

Hemiclepsis guangdongensis sp.nov. (Figs.1-2) Medium size, body flattened and elliptical. Anterior part narrow, posterior wider. Head-region dilated and distinct from the rest of the body .Body length 16-25*!mm,maximum width 6-9*!mm.Diameter of caudal sucker 2-3*!mm.Diameter of anterior sucker (1.0-1.5)*!mm×(0.6-1.0)*!mm. The new species differs from all the known members of the genus in the following feature:1) eyes situated at fourth ring; 2) dorsal surface with large numbers of papillae ;3) 67 rings, male pore situated at between rings 24 and 25 in somite Ⅹ/Ⅺ,female pore lies between rings 26 and 27 in somite Ⅺ/Ⅻ;4)crop with 10 pairs of caeca ,first pair small and extending directly forward and obliquely; 5)6 pairs of testes lying between the 1st-7th pairs of caeca. Holotype and 10 paratypes specimens were collected from the skin of Cuora amboinensis in Guangzhou City (23 °1′N, 113 °2′E),Guangdong Province.