Rodriguez Pilar, Vučković Natalija, Kerovec Mladen
Department of Zoology and Animal Cell Biology, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Box 644, Bilbao, 48080 Spain..
Zootaxa. 2020 Mar 31;4758(3):zootaxa.4758.3.2. doi: 10.11646/zootaxa.4758.3.2.
Two new aquatic oligochaete species are described from tufa barriers in Croatia. The reproductive system in the phallodriline Aberrantidrius mihaljevici Vučković et al. n. sp. conforms to the general pattern in the genus but it is distinguished by a combination of characters, including the shape and length of penial chaetae (3 times the mean length of somatic chaetae), atrium shape and spermathecal pore position (anterior in the postatrial segment). The lumbriculid Stylodrilus tofaceus Rodriguez et al. n. sp. is mainly distinguished from congeners by the spindle-shaped spermathecal ducts with high lining epithelium, and position of the spermathecal pores. These two new taxa reveal that aquatic oligochaete communities in tufa barriers of karstic regions may be of particular interest with respect to diversity of endemic taxa, and also for study of colonization routes of this interesting habitat, with possible relations with groundwaters. The finding of one specimen attributable to the genus Eclipidrilus may open ainteresting research on the biogeography of this Nearctic genus.
本文描述了克罗地亚石灰华屏障中发现的两种新的水生寡毛纲物种。阴茎蚯蚓科的米氏奇异蚓Aberrantidrius mihaljevici Vučković等人新物种的生殖系统符合该属的一般模式，但其具有一系列独特特征，包括阴茎刚毛的形状和长度（是体壁刚毛平均长度的3倍）、心房形状和受精囊孔位置（位于心房后段的前部）。仙女虫科的托法斯氏长吻蚓Stylodrilus tofaceus Rodriguez等人新物种主要通过具有高衬里上皮的纺锤形受精囊管以及受精囊孔的位置与同属其他物种区分开来。这两个新分类单元表明，喀斯特地区石灰华屏障中的水生寡毛纲群落可能在特有分类单元的多样性方面具有特殊意义，同时对于研究这一有趣栖息地的定殖路线以及与地下水的可能关系也具有重要价值。发现一个可归属于隐蚓属Eclipidrilus的标本可能会开启对这个新北区属生物地理学的有趣研究。
