A new nematode species, Latronema dyngi sp. nov., is described from Skagerrak off the west coast of Sweden with the type locality near Dyngö island. Latronema dyngi sp. nov. is characterized by multispiral amphideal fovea with circular outline, 0.2–0.3 corresponding body diameters wide in males and 0.1–0.2 corresponding body diameters wide in females, 12 cuticular longitudinal ridges and 18–27 precloacal supplements in males. Latronema dyngi sp. nov. most closely resembles L. orcinum in terms of body length; demanian ratios a, b, c and c′; number of amphid turns in males; and the ratio of spicule length to cloacal body diameter. The two species can be differentiated by the number longitudinal ridges on the cuticle (12 for Latronema dyngi sp. nov. vs 20–22 for L. orcinum) and spicule length (65–78 μm for L. dyngi vs 60 for L. orcinum) and shape (weakly arcuate for L. dyngi sp. nov. vs strongly arcuate for L. orcinum). We also performed a maximum likelihood phylogenetic analysis on over 250 nematodes of the subclass Chromadoria based on their nearly full-length 18S rDNA sequences. In agreement with previous studies, our analysis supported Selachinematidae as a monophyletic group and placed Richtersia Steiner, 1916 within Desmodoridae Filipjev, 1922 or just outside of the main Desmodorida clade with the latter placement not well supported.

一种新的线虫物种，天牛。nov。，在瑞典西海岸的Skagerrak进行描述，其类型地区为Dyngö岛附近。Latronema dyngi SP。十一月 其特点是具有圆形轮廓的多螺旋体两栖中央凹，雄性的对应体径为0.2-0.3，雌性的对应体径为0.1-0.2，雄性有12个表皮纵脊和18-27个泄殖腔前补体。Latronema dyngi SP。十一月 最接近L. orcinum在车身长度方面; 迪曼比率a，b，c和c'; 男性的两栖转弯次数；以及针刺长度与泄殖腔体径的比率。可以通过角质层上的纵向脊的数量来区分这两种（12Latronema dyngi SP。十一月 VS 20-22为L. orcinum）和毛刺长度（65-78微米为L. dyngi VS 60 L. orcinum）和形状（弱弧形为L. dyngi属十一月VS强烈弓形为L. orcinum）。我们还基于近乎全长的18S rDNA序列，对250多个亚类Chromadoria线虫进行了最大似然系统发育分析。与先前的研究一致，我们的分析支持S蛛科作为单系统种群，并将1916年的Richtersia Steiner放置在1922年的Desmodoridae Filipjev内或仅在Desmodorida的主要进化枝之外，而对后者的放置没有很好的支持。