中国近海叶海兔属一新种和一新记录(无楯目:海兔科)  

A NEW SPECIES AND A NEW RECORD OF THE GENUS PETALIFERA (OPISTHOBRANCHIA) OF CHINA (ANASPIDEA:APLYSIIDAE)

作　　者：林光宇[1] 

机构地区：[1]中国科学院海洋研究所

出　　处：《动物分类学报》1990年第1期21-24,共4页Acta Zootaxonomica Sinica

摘　　要：叶海兔属Petalifera Gray,1847是海兔科Aplysiidae的一群小型种类,除了分布于地中海,大西洋的Petalifera petalifera Rang,1828曾被认为是环热带分布种外,见于世界各热带、亚热带海域潮间带—潮下带浅水区的海草间、石头下。在我国,张玺(1935)报道过分布于黄、渤海区,生活在潮间带大叶藻Zostera marina上的一种斑叶海兔Petalifera punctulata。作者在青岛沿岸潮间带大叶藻上又发现2种,一种是分布于日本南部沿岸的枝叶海兔Petalifera ramosa,在我国为首次记录、另一种命名为青岛斑叶海兔Petalifera qingdaonensis是新种。This paper desls with 2 species of Petalifcra a Gray belonging to the Aplysiidae collected from Qingdao, of which, a species is new to science and a species is recorded for the first time from China.Petalifera qingdaonensis sp. nov. (fig. 2)Holotype No. Mo27959, Ma Xiu-tong collected from the intertidal zone. Qingdao (120°25'E. 36°5'N.). May, 21 1983.Specimen is deposited in the Institute of Oceanology, Academia Sinica.Body elongate-oval depressed, 38 mm in length, 12 mm in breadth. Head small, narrow, cephalic tentacles as usual as the genus, but a little longer and slender and scattered with small conical papilla and stand a short distance behind the anterior tentacles. Eyes immerse in the integument and immediately in front of the rhinophores. Dorsal surface scattered with a few conical retractile papillae, some of which are branches. The widest portion is at the median part of the body.Parapodial lobes are short, unequal, the right overlapping the left and the dorsal slit is placed about the mid-way along the body length, but on the right side slightly, leaving an aperture at each side of the slit; the shell, ctenidium and anus papilla may be seen when op-enning. Genital orifice within the dorsal slit and with an oval-sperm groove connected with male pore. Oral tentacles triangular. Foot distinctly narrower than the body, truncated in front, rounded behind. Mantle with a large aperture, a great part of the shell being thus exposed. Shell small, 6mm in length and 2.2mm in breadth, semi-transparent, narrow, elongate-oval, without a posterior sinus and spiral apex. General ground-colour is yellowish. Dorsal surface covered with fine brown circle lines and arranged in several longitudinal rows, which are distinct on the median part of the back, becoming indistinct toward the margin, also with dark-brown discontinuous transverse short lines. The dorsal papilla and anus papilla are brown. Sole with white, green shaded on the median part, Jaw plates thin, yellowish-white, semi-circular, consist of simple elements.

关 键 词：无楯目 海兔科 叶海兔属 新种 

分 类 号：Q959.212.5[生物学—动物学]