Revkova Tatiana N, Sergeeva Nelli G
A.O. Kovalevsky Institute of Biology of the Southern Seas of RAS; 2; Nakhimov ave.; 299011; Sevastopol; Russia.
Zootaxa. 2024 Dec 2;5543(1):123-134. doi: 10.11646/zootaxa.5543.1.7.
Two new species Richtersia japonica sp. nov. and Richtersia amurica sp. nov. are described from the shallow water of the Sea of Japan. Both new species are characterized by the presence of multispiral amphidial fovea 3.5 turns in males and one turn in females; two unequal spicules and gubernaculum with anterior apophyses. R. japonica sp. nov. is most similar to R. beibuwanensis Fu, Cai, Boucher, Cao & Wu, 2013 and R. staresensis Soetaert & Vincx, 1987 in having arrangement of longitudinal rows of spines and presence of anterior apophyses on gubernaculum, but differs from them by the length of the spicules and in de Man a value in males. R. amurica sp. nov. is most similar to R. coomansi Soetaert & Vincx, 1987 and R. inaequalis Riemann, 1966 in having arrangement of longitudinal spine rows beginning at the level of the amphidial fovea and in long hairy spines on the tail of females. But it differs from them by presence of anterior apophyses on gubernaculum and length of the spicules. Data on the geographic and bathymetric distribution of all valid Richtersia species are provided.
描述了采自日本海浅水区域的两个新物种，即日本里氏线虫新种（Richtersia japonica sp. nov.）和阿穆尔里氏线虫新种（Richtersia amurica sp. nov.）。这两个新物种的特征为：雄虫的多螺旋化感器窝为3.5圈，雌虫为1圈；有两根不等长的交合刺和具前突的引带。日本里氏线虫新种在刺的纵向排列行以及引带上存在前突方面，与2013年的北部湾里氏线虫（Richtersia beibuwanensis Fu, Cai, Boucher, Cao & Wu）和1987年的斯塔雷斯里氏线虫（Richtersia staresensis Soetaert & Vincx）最为相似，但在交合刺长度和雄虫的德曼a值方面与之不同。阿穆尔里氏线虫新种在纵向刺列从化感器窝水平开始排列以及雌虫尾部有长毛状刺方面，与1987年的库曼斯里氏线虫（Richtersia coomansi Soetaert & Vincx）和1966年的不等里氏线虫（Richtersia inaequalis Riemann）最为相似。但它在引带上存在前突和交合刺长度方面与之不同。提供了所有有效里氏线虫物种的地理和深度分布数据。
