Hydrozoan Research Laboratory, 405 Chemin Les Gatiers, 83170 Tourves, France..
Università degli Studi di Milano-Bicocca, Dipartimento di Scienze dell'Ambiente e della Terra, Piazza della Scienza 1, 20126 Milano, Italy..
Zootaxa. 2022 Nov 30;5214(1):1-46. doi: 10.11646/zootaxa.5214.1.1.
Eleven species of hydroids belonging to the genus Zygophylax Quelch, 1885 are present in the material collected by the KANACONO, KANADEEP and KANADEEP 2 expeditions of the French Tropical Dee-Sea Benthos Program. Of these, ten represent known taxa and are fertile specimens, while the last one is unidentifiable in the absence of its gonosome. Seven species are new records for the study area. Zygophylax dispersa Peña Cantero, 2020 is assigned to the synonymy of Z. pseudafricana Vervoort & Watson, 2003, while Z. laertesi Peña Cantero, 2020 is comprehensively redescribed based on numerous and morphologically-varied specimens. Uncertainties exist as to the synonymy between Z. antipathes (Lamarck, 1816) and Z. rufa (Bale, 1884), but the oldest available binomen was nevertheless used. The presence of nematothecae is confirmed in Z. polycarpa Vervoort & Watson, 2003, a species with unusual gonothecae for the genus, now redescribed based on additional, abundant material. Zygophylax pseudosibogae Gu et al., 2022 is also redescribed, supplementing the original account. Finally, phylogenetic analyses, based on the 16S rRNA gene, allowed the genetic characterization of a total of twenty nominal species of Zygophylax, including sequences for eight taxa not considered so far. The number of Zygophylax species known from the New Caledonian area is raised from eight to sixteen.
在法国热带深海底栖生物计划的 KANACONO、KANADEEP 和 KANADEEP 2 考察中采集的标本中，发现了 11 种属于 Zygophylax Quelch, 1885 属的水螅。其中，有 10 种是已知的分类单元，且为可育标本，而最后一种由于缺少配子体而无法识别。有 7 种是研究区域的新记录。将 Zygophylax dispersa Peña Cantero, 2020 归入 Z. pseudafricana Vervoort & Watson, 2003 的同义名，同时根据大量形态各异的标本对 Z. laertesi Peña Cantero, 2020 进行了全面重描述。Z. antipathes (Lamarck, 1816) 和 Z. rufa (Bale, 1884) 之间的同义性存在不确定性，但仍使用了可获得的最古老的二名法。在 Z. polycarpa Vervoort & Watson, 2003 中确认存在线虫，这是一种属内具有不寻常的生殖巢的物种，现根据更多丰富的材料进行了重新描述。同时，还对 Zygophylax pseudosibogae Gu et al., 2022 进行了重新描述，补充了原始描述。最后，基于 16S rRNA 基因的系统发育分析，对总共 20 种名义上的 Zygophylax 物种进行了基因特征分析，包括迄今为止未考虑的 8 个分类单元的序列。从新喀里多尼亚地区已知的 Zygophylax 物种数量从 8 种增加到 16 种。
