Bartels Paul J, Fontoura Paulo, Nelson Diane R
Department of Biology, Warren Wilson College, Asheville, NC 28815, USA.; Email:
Department of Biology, Faculty of Sciences, University of Porto. R. Campo Alegre s/n, FC4, 4169-007 Porto, Portugal.; Email:
Zootaxa. 2015 May 5;3955(3):389-402. doi: 10.11646/zootaxa.3955.3.6.
Five marine arthrotardigrade species are recorded from Moorea, Society Islands, French Polynesia. Four were collected from coral sand; two, Dipodarctus anaholiensis Pollock, 1995 and Florarctus kwoni Chang & Rho, 1997, are new records for the region, and two, Halechiniscus perfectus Schulz, 1955 and Styraconyx kristenseni kristenseni Renaud-Mornant, 1981, have been previously reported. The fifth, a new species Styraconyx turbinarium sp. nov., is described and was collected from the drifting brown alga Turbinaria ornata. The new species is characterized by the presence of peduncles on all digits, an elongate primary clava, and the lateral cirrus A arising from a common pedestal and enveloped by a common membrane extending almost to the claval tip. The new species differs from the most similar species, Styraconyx tyrrhenus D'Addabbo Gallo, Morone De Lucia & de Zio Grimaldi, 1989, by having longer and differently shaped primary clavae which are elongated in the new species and club-shaped in S. tyrrhenus. By having a dorsal cuticle that is coarsely punctated but without folds or other ornamentations, the new species can be easily distinguished from S. craticulus (Pollock, 1983), a species with similar primary clavae, but with cuticular dorsal folds ornamented with a grid-like pattern.
从法属波利尼西亚社会群岛的莫雷阿岛记录到了五种海洋节肢缓步动物。其中四种是从珊瑚砂中采集到的；两种，即1995年的波洛克描述的安娜霍利双足缓步虫（Dipodarctus anaholiensis）和1997年张和卢描述的科氏花缓步虫（Florarctus kwoni），是该地区的新记录，另外两种，即1955年舒尔茨描述的完美哈氏缓步虫（Halechiniscus perfectus）和1981年勒诺 - 莫尔南特描述的克里斯滕森氏硬甲缓步虫（Styraconyx kristenseni kristenseni），此前已有报道。第五种是一个新物种，即涡轮硬甲缓步虫（Styraconyx turbinarium sp. nov.），已被描述，它是从漂浮的褐藻涡轮藻（Turbinaria ornata）上采集到的。该新物种的特征是所有趾上都有柄节，初级棒状体细长，侧触须A起源于一个共同的基座，并被几乎延伸到棒状体顶端的共同膜所包围。该新物种与最相似的物种，即1989年达达博·加洛、莫罗内·德卢西亚和德齐奥·格里马尔迪描述的第勒尼安海硬甲缓步虫（Styraconyx tyrrhenus）不同，其初级棒状体更长且形状不同，新物种的初级棒状体是细长的，而第勒尼安海硬甲缓步虫的是棒状的。通过具有粗糙点状但无褶皱或其他纹饰的背表皮，该新物种可以很容易地与具有相似初级棒状体但背表皮有网格状纹饰褶皱的克拉蒂库斯硬甲缓步虫（Styraconyx craticulus，波洛克，1983年）区分开来。
