来自中国渤海潮间带的希阿线虫科（线虫纲：单宫目）两个新物种。

Two new species of Xyalidae (Nematoda: Monhysterida) from intertidal zone of the Bohai Sea, China.

作者信息

Zhai Hongxiu, Geng Chunxiao, Sun Jun

机构信息

College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China 2 Institute for Advanced Marine Research, China University of Geosciences, Guangzhou 511462, China.

3 College of Life Sciences, Liaocheng University, Liaocheng 252059, China.

出版信息

Zootaxa. 2022 Dec 19;5222(2):133-144. doi: 10.11646/zootaxa.5222.2.2.

DOI:10.11646/zootaxa.5222.2.2

PMID:37044535

Abstract

Two new nematode species are described from the intertidal zone of the Bohai Sea, China. Paramonohystera gracilis sp. nov. is characterized by slender body with a long filiform tail; oval amphidial fovea 6 µm in diameter; spicules slender, 3.4 a.b.d. long; gubernaculum small, plate shaped without apophysis. It differs from the most similar species P. riemanni (Platt, 1973) Lorenzen, 1977 by much slender body and longer filiform tail. Amphimonhystrella boucheri sp. nov. is characterized by short body, deep buccal cavity with funnel shaped anterior portion, circular amphids, conico-cylindrical tail with two thirds conical anterior portion and a third cylindrical posterior portion, small spicules L-shaped and gubernaculum with short apophysis. It is distinguished from the most similar species A. unita Lorenzen, 1977 in buccal cavity funnel shaped, small amphidial fovea circular, spicules short with tapered distal end. Updated keys for valid species of Paramonohystera and Amphimonhystrella are provided.

摘要

本文描述了采自中国渤海潮间带的两个线虫新物种。纤细副单宫线虫（Paramonohystera gracilis sp. nov.）的特征为：身体细长，尾部呈丝状；椭圆形的两性感器窝直径为6 µm；交合刺细长，长为3.4倍肛前体长；引带小，呈板状，无突出部。它与最相似的物种里氏副单宫线虫（P. riemanni (Platt, 1973) Lorenzen, 1977）的区别在于身体更为细长，丝状尾更长。布氏双单宫线虫（Amphimonhystrella boucheri sp. nov.）的特征为：身体短小，口腔深，前部呈漏斗状，两性感器圆形，尾呈圆锥-圆柱形，前部三分之二为圆锥形，后部三分之一为圆柱形，交合刺小，呈L形，引带有短突出部。它与最相似的物种单形双单宫线虫（A. unita Lorenzen, 1977）的区别在于口腔呈漏斗状，两性感器窝小且圆形，交合刺短，末端渐细。文中还提供了副单宫线虫属和双单宫线虫属有效物种的最新检索表。