Third Institute of Oceanography; Ministry of Natural Resources; Xiamen; 361005; China.
National Institute of Water and Atmospheric Research; Wellington; 14901; New Zealand.
Zootaxa. 2023 Dec 22;5389(5):563-581. doi: 10.11646/zootaxa.5389.5.3.
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.
两种新的自由生活海洋线虫属 Sabatieria de Rouville, 1903 种，来自南大洋，使用形态和分子数据进行描述。Sabatieria brevicaudata sp. nov. 的特征是体长 14761740 微米，短头毛，1324%对应体直径长，体表皮层的侧向分化只有略微粗糙的点刻，螺旋状的 Amphidial 窝有 3 圈，刺 1.31.6 肛体直径长，略微弧形的 gubernacular 附属物，以及 12 个前肛体补充物，呈小孔状。Sabatieria multipora sp. nov. 的特征是体长 21392324 微米，短头毛（47 微米长，3040%对应体直径长），表皮层的侧向分化有明显较粗糙的点刻，从 Amphidial 窝的前缘延伸到肠的前缘和尾部，螺旋状的 Amphidial 窝有 3 圈，雄性刺 1.92.0 肛体直径长，17 个细管状的前肛体补充物，相邻补充物之间的距离向前增加，并有弯曲的 gubernacular 附属物。我们从这两个新物种中获得了 18S rDNA 和 28S rDNA 序列，它们都与其他 Sabatieria 物种密切相关。我们的分析还表明，一些 Comesomatidae Filipjev, 1918 属不形成单系类群。
