Abstract：
Two new free-living marine nematode species of the genus Sabatieria de Rouville, 1903 are described from the Southern Ocean using morphological and molecular data. Sabatieria brevicaudata sp. nov. is characterized by body length 14761740 m, short cephalic setae, 1324% corresponding body diameter long, lateral differentiation of body cuticle with only slightly coarser punctations, spiral amphidial fovea with 3 turns, spicules arcuated and 1.31.6 cloacal body diameter long, slightly arcuated gubernacular apophyses, and twelve precloacal supplements, in the form of small pores. Sabatieria multipora sp. nov. is characterized by body length 21392324 m, short cephalic setae (47 m long, 3040% corresponding body diameter long), cuticle with lateral differentiation of distinctly coarser punctations extending from anterior edge of amphidial fovea to anterior of intestine and in the tail region, spiral amphidial fovea with 3 turns, males with spicules 1.92.0 cloacal body diameter long, seventeen fine tubular precloacal supplements with distance between adjacent supplements increasing towards anterior, and with curved gubernacular apophyses. We obtained 18S rDNA and 28S rDNA sequences from the two new species, which are both closely related to other species of Sabatieria. Our analyses also show that several genera of Comesomatidae Filipjev, 1918 do not form monophyletic clades.
摘要：
SabatieriadeRouville属的两个新的自由生活海洋线虫物种，1903年是使用形态和分子数据从南大洋描述的。Sabatieriabrevicaudatasp.11月。其特点是体长14761740米，短头刚毛，1324%对应体径长,身体角质层的侧向分化，只有稍微粗糙的穿孔，螺旋两盘中央凹3圈，针状弓形和1.31.6泄殖腔体径长，稍有弧形的gubernacular连接突，和十二种前血液补充剂，小毛孔的形式。Sabatieriamultiporasp.11月。其特点是体长21392324米，短头刚毛(47米长，3040%对应体径长),角质层具有明显粗糙的穿孔的横向分化，从两栖窝的前边缘延伸到肠前和尾部区域，螺旋两盘中央凹3圈，男性具针状体直径长1.92.0，17个细肾小管前动脉补充剂，相邻补充剂之间的距离朝前增加，并伴有弯曲的gubernacular连接突。我们从两个新物种中获得了18SrDNA和28SrDNA序列，它们都与其他物种Sabatieria密切相关。我们的分析还表明，菲律宾科的几个属，1918年不形成单系进化枝。
