Instituto de Ciencias del Mar y Limnologa, Unidad Acadmica Mazatl, Universidad Nacional Autnoma de Mxico; Joel Montes Camarena s/n, Fracc. Playa Sur, Mazatl, 82040, Sinaloa, Mxico. .
Zootaxa. 2021 Oct 12;5051(1):171-235. doi: 10.11646/zootaxa.5051.1.12.
Several species belonging to the harpacticoid families Ameiridae Boeck, Ancorabolidae Sars, Argestidae Por, and Rhizothrichidae Por have been described so far as an ongoing long-term project on the diversity of deep-sea benthic harpacticoids collected from the Gulf of California and Mexican Pacific. Amongst the several harpacticoid taxa, the subfamily Stenheliinae Brady (Miraciidae Dana) showed to be one of the most important components to overall species richness in deep-sea sediments. Following the rejection of segmentation pattern of the first swimming leg as the only discriminant for subgeneric assignment of stenheliin taxa, four new species of Delavalia Brady, 1869 and two new genera, Archaeohuysia gen. nov. and Diarthropodella gen. nov. are proposed herein. The new Delavalia species belong to the longicaudata-group with close relatives in shallow-water habitats. The so far monotypic Archaeohuysia gen. nov. showed to be unique in the combination of the general structure of the first swimming leg and retention of the primitive complement of four setae on the second endopodal segment of the same leg. Diarthropodella gen. nov. is the only stenheliin taxon with a two-segmented exopod of the first swimming leg. Some comments are given on probable multiple colonization events of stenheliin taxa.
迄今为止，作为一项正在进行的关于从加利福尼亚湾和墨西哥太平洋深海底层桡足类多样性收集的长期项目，已经描述了属于 Ameiridae Boeck、Ancorabolidae Sars、Argestidae Por 和 Rhizothrichidae Por 等几种桡足类科的物种。在几种桡足类分类群中， Stenheliinae Brady（Miraciidae Dana）亚科是深海沉积物中物种丰富度的最重要组成部分之一。在拒绝将第一游泳足的分段模式作为 stenheliin 分类群亚种分配的唯一判别标准之后，本文提出了四个新的 Delavalia Brady，1869 种和两个新属，Archaeohuysia gen. nov. 和 Diarthropodella gen. nov. 新的 Delavalia 物种属于长尾组，与浅海生境中的近亲关系密切。迄今为止，单型的 Archaeohuysia gen. nov. 以第一游泳足的一般结构和同一足的第二内附肢段上保留的原始四组刚毛的组合为特征，是独一无二的。Diarthropodella gen. nov. 是唯一具有第一游泳足分段外肢的 stenheliin 分类群。本文对 stenheliin 分类群可能的多次殖民事件进行了一些评论。
