Li Ting, Huang Yong, Huang Mian
College of Life Sciences, Liaocheng University, Liaocheng 252059, China Liaocheng University Liaocheng China.
Zookeys. 2024 Feb 29;1193:63-79. doi: 10.3897/zookeys.1193.110188. eCollection 2024.
Two new marine nematode species belonging to the order Monhysterida are described from the sea of China. is characterized by its relatively small body size; short anterior sensory setae; small, circular amphidial fovea located at the level of buccal cavity base; funnel-shaped buccal cavity; an excretory-secretory system with a large ventral gland and opening as a very narrow canal just posterior to the level of cephalic setae; slightly curved slender spicules with cephalated proximal end and tapered distal end; rod-like gubernaculum without apophysis; two papilliform precloacal supplements just in front of the cloaca; conico-cylindrical tail with two ventral papillae, each with a seta; and distance between the vulva and anus slightly longer than the tail length. This is the first new species of epiphytic nematode reported in China. The second new species, , has a relatively shorter body and longer tail; striated cuticle; The anterior sensilla arranged in two circles, the first circle consisting of six inner labial setiform papillae (3-4 µm) and the second circle consisting of 16 long setae (12-19 µm); a transversely oval amphideal fovea; a well-developed muscle around the funnel-shaped buccal cavity; short spicules and a gubernaculum composed of a single piece; and precloacal supplements absent. An updated key to all species of and pictorial key to all species of are also given.
本文描述了采自中国海域的2个新的海生小杆目线虫物种。第一个新物种的特征为：虫体相对较小；头部感觉刚毛短；圆形的小化感器位于口腔基部水平；口腔呈漏斗形；排泄-分泌系统具一个大的腹侧腺，在头部刚毛水平稍后处开口为一条非常狭窄的管道；交合刺细长，略弯曲，近端具头状结构，远端渐细；引带杆状，无突出物；泄殖腔前有两个乳头状补充器；尾呈圆锥-圆柱形，具两个腹侧乳突，每个乳突具一根刚毛；阴门与肛门之间的距离略长于尾长。这是中国报道的首个附生线虫新物种。第二个新物种的特征为：虫体相对较短，尾较长；角质层具横纹；头部感器排列成两个圆圈，第一圈由6个内侧唇形刚毛状乳突（3-4微米）组成，第二圈由16根长刚毛（12-19微米）组成；化感器横向椭圆形；漏斗形口腔周围肌肉发达；交合刺短，引带由单一部分组成；无泄殖腔前补充器。文中还给出了该属所有物种的最新检索表以及该属所有物种的图谱检索表。
