Department of Biology, Keio University, Yokohama 223-8521, Japan,
Department of Biosciences and Bioinformatics, Faculty of Science and Technology, Keio University, Yokohama 223-8522, Japan.
Zoolog Sci. 2023 Jun;40(3):246-261. doi: 10.2108/zs220085.
There have been several records in the last 60 years for East Antarctica for Doyère, 1840 sensu lato, now considered a species complex. During the 56th Japanese Antarctic Research Expedition summer operation (2014-2015), a new tardigrade species in the genus Doyère, 1840 was found in an ice-free Innhovde area along Lützow-Holm Bay, Dronning Maud Land, East Antarctica. The new species has aberrant claws with four to seven points on each secondary claw branch, which distinguishes it from other species. A male specimen was found in the population and evidence showed that an isolated adult female moulted twice without oviposition. This strongly suggested bisexual reproduction for this population. The new species, sp. nov., is described with its phylogenetic position and a discussion on the reproductive strategies for the harsh environments.
在过去的 60 年里，有几个记录为东南极洲的 Doyère，1840 广义上，现在被认为是一个物种复合体。在第 56 次日本南极研究考察夏季作业（2014-2015）期间，在东南极洲的朗格洛姆湾的 Lützow-Holm 湾沿线的一个无冰 Innhovde 地区发现了一个新的缓步动物属种 Doyère，1840。这个新物种的爪子异常，每个次级爪分支上有四到七个点，这使它与其他物种区分开来。在这个种群中发现了一个雄性标本，并有证据表明，一个孤立的成年雌性蜕皮了两次而没有产卵。这强烈表明这个种群存在两性繁殖。这个新物种，sp. nov.，被描述了它的系统发育位置，并讨论了在恶劣环境中的繁殖策略。
