Universidade de Vigo, ECOEVO Lab., Escola de Enxeara Forestal, Campus Universitario, 36005 Pontevedra, Spain.
NatureFiji-MareqetiViti, P. O. Box 2041, Government Buildings, Suva, Fiji.
Zootaxa. 2021 Dec 16;5082(2):101-117. doi: 10.11646/zootaxa.5082.2.1.
Nesobasis rito sp. nov. (Holotype , Fiji, Vanua Levu, Drawa, 31 v 2018, A. Rivas-Torres leg.) from the comosa group is here described, illustrated, diagnosed, and compared with morphologically close species of the genus. Nesobasis rito can be distinguished from its related congeners by the shape of the caudal appendages and the ligula. The most similar species are N. comosa and N. heteroneura, which, like N. rito, have the caudal appendages covered by dense setae (especially the first species), but the shape differs clearly in lateral view, with N. rito having longer and more slender appendages, and a basal tooth clearly seen in dorsal view, absent in other members of the comosa group. The specific status of the collected specimens is also supported by the results of genetic analyses, where N. rito appears as a well-supported monophyletic clade. Nesobasis rito also has a distinct distribution from its most similar congeners: it is found on Vanua Levu, while N. comosa is found on Viti Levu and the closely related N. heteroneura is found on Viti Levu and Ovalau. All species of this group are found in streams with native forest riparian vegetation on their respective islands.
新种 Nesobasis rito（模式标本，斐济，瓦努阿莱武岛，Drawa，2018 年 11 月 20 日，A. Rivas-Torres 采集）来自 comosa 组，本文对其进行了描述、图示、诊断，并与属内形态相近的种进行了比较。Nesobasis rito 可通过尾附肢和 Ligula 的形状与其近缘种区分开来。最相似的物种是 N. comosa 和 N. heteroneura，它们与 N. rito 一样，尾附肢被密生的刚毛覆盖（尤其是第一个物种），但在侧视图中形状明显不同，N. rito 的附肢更长更细，在背视图中可以清楚地看到基齿，而在 comosa 组的其他成员中则没有。遗传分析的结果也支持所采集标本的种的地位，其中 N. rito 表现出一个支持良好的单系群。Nesobasis rito 也与最相似的近缘种有明显的分布差异：它分布在瓦努阿莱武岛，而 N. comosa 分布在维提岛，而密切相关的 N. heteroneura 则分布在维提岛和奥瓦劳岛。该组的所有物种都分布在各自岛屿上具有原生林河岸植被的溪流中。
