Chu Mengdi, Hao Yingdong, Huang Yong
College of Life Sciences; Liaocheng University; Liaocheng 252059; P. R. China.
Key Laboratory for Ecological Conservation and Biodiversity of Institution of Higher Learning of Shandong Province; Liaocheng 252059; China.
Zootaxa. 2023 Mar 31;5258(5):524-536. doi: 10.11646/zootaxa.5258.5.2.
Two new free-living marine nematodes which were collected at silt beach of Rizhao along the Yellow Sea are identified here as Leptolaimus sinensis sp. nov. and Perspiria brevicaudata sp. nov. Leptolaimus sinensis sp. nov. is characterized by annulated cuticle with lateral alae, 2 µm in width; buccal cavity cylindrical; cephalic setae 2 µm long; amphidial fovea unispiral, circular in outline; six to seven evenly spaced tubular precloacal supplements and 23-29 continuous alveolar supplements extending from cloaca to level of the base of buccal cavity; spicules slender, slightly arcuate; gubernaculum with dorso-caudal apophysis; tail conico-cylindrical, about 6 times cloacal body diameter in males and elongated in females, about 9 times anal body diameter in length. Perspiria brevicaudata sp. nov. is characterized by having four cephalic setae and four cervical setae; small buccal cavity with dorsal tooth and minute ventral tooth; amphidial fovea unispiral, looking like double circle in outline, surrounded partially by cuticle striations; spicules arcuate with ventral velum, handle-like proximally and tapered distally; gubernaculum plate-shaped, without apophysis; twelve winged precloacal supplements present. Updated identification keys for group of Leptolaimus species characterized by the presence of both alveolar and tubular precloacal supplements and for species of Perspiria are also given.
在此鉴定了两种新的自由生活海洋线虫，它们是在黄海沿岸日照的淤泥滩采集的，分别为中华细齿线虫新种（Leptolaimus sinensis sp. nov.）和短尾透皮线虫新种（Perspiria brevicaudata sp. nov.）。中华细齿线虫新种的特征为：角质层有环纹，具侧翼，宽2 µm；口腔呈圆柱形；头部刚毛长2 µm；双窝单螺旋形，轮廓呈圆形；六到七个均匀间隔的管状泄殖腔前补充器，以及23 - 29个连续的肺泡状补充器，从泄殖腔延伸至口腔基部水平；交合刺细长，略呈弓形；引带具背尾突；尾部呈圆锥圆柱形，雄性约为泄殖腔处体径的6倍，雌性细长，约为肛门处体径的9倍。短尾透皮线虫新种的特征为：有四根头部刚毛和四根颈部刚毛；口腔小，有背齿和微小的腹齿；双窝单螺旋形，轮廓似双圆，部分被角质层条纹包围；交合刺呈弓形，具腹膜，近端呈柄状，远端渐细；引带呈板状，无突起；有十二个带翼的泄殖腔前补充器。还给出了以肺泡状和管状泄殖腔前补充器为特征的细齿线虫属物种组以及透皮线虫属物种的更新鉴定检索表。
