Huang Mian, Zhai Hongxiu
College of Life Sciences, Liaocheng University, Liaocheng 252059, China Liaocheng University Liaocheng China.
Zookeys. 2024 Jul 31;1208:259-274. doi: 10.3897/zookeys.1208.124047. eCollection 2024.
Two new marine nematode species belonging to the genus from the intertidal zone of the Yellow Sea are described. is characterized by amphideal fovea with 2.5-3.0 turns, 20-27% of corresponding body diameters; spicules curved, middle portion broad, tapering distally, 1.4-1.5 cloacal body diameters long; gubernaculum slender consisting of two detached lateral pieces tapering distally; 10-13 papilliform precloacal supplements in two groups, the posterior three supplements smaller and closer to each other, the remaining supplements larger and widely spaced; tail conico-cylindrical with a half cylindrical portion. The second new species, is distinct by having lateral differentiation present except in anterior half of pharynx which has even punctations, amphideal fovea with 3.0-3.3 turns, spicules curved, gradually narrowing from proximal to distal end with pointed tip, 7 papilliform precloacal supplements, gradually increasing the spacing distance forward, two rows of subventral conical setae situated at the precloacal region, tail elongated, filiform. An updated key to 30 valid species of is provided.
描述了来自黄海潮间带的两个属于该属的海洋线虫新物种。第一个新物种的特征为：双凹具2.5 - 3.0圈，为相应体径的20 - 27%；交合刺弯曲，中部宽，向远端逐渐变细，长为泄殖腔体径的1.4 - 1.5倍；引带细长，由两个分离的侧向片组成，向远端逐渐变细；10 - 13个乳头状泄殖腔前补充器分两组，后三个补充器较小且彼此靠近，其余补充器较大且间隔较宽；尾部为圆锥 - 圆柱形，有一个半圆柱形部分。第二个新物种的不同之处在于，除咽部前半部分有均匀的小孔外，有侧向分化，双凹具3.0 - 3.3圈，交合刺弯曲，从近端到远端逐渐变窄，尖端尖锐，7个乳头状泄殖腔前补充器，向前间距逐渐增大，在泄殖腔前区域有两排腹侧锥形刚毛，尾部细长，呈丝状。提供了该属30个有效物种的更新检索表。
