In 2016, three specimens of Caymanostella were collected from the Kuril-Kamchatka Trench area at depths of 5101–5134 m. Comparative morphological analysis revealed that the new specimens are similar to Caymanostella spinimarginata, the most geographically distant species (Atlantic Ocean). The new specimens were identified as C. cf. spinimarginata. Multilocus genetic data were obtained for the family Caymanostellidae for the first time in this study. Molecular evidence based on the analyses of three mitochondrial and two nuclear markers recovers the family Caymanostellidae as a sister-taxon to Ophidiasteridae (order Valvatida). Phylogenetic data indicate that morphological features, which were previously used to imply asterinid, xyloplacid or korethrasterid affinities for the family Caymanostellidae, emerged independently. It is suggested that the family Caymanostellidae should be placed within the order Valvatida.

中文翻译：

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与木材相关的海星Caymanostella的新记录，以及Caymanostellidae（Asteroidea）家族的系统发育位置的注释

2016 年，在千岛-堪察加海沟地区 5101-5134 m 深处采集了 3 个 Caymanostella 标本。比较形态分析表明，新标本与地理上最遥远的物种（大西洋）Caymanostella spinimarginata 相似。新标本被确定为 C.cf. 棘突。本研究首次获得了Caymanostellidae科的多位点遗传数据。基于对三个线粒体和两个核标记物的分析的分子证据表明 Caymanostellidae 是 Ophidiasteridae（Valvatida 目）的姐妹分类群。系统发育数据表明，以前用于暗示 Caymanostellidae 家族的 asterinid、xyloplacid 或 korethasterid 亲和力的形态特征是独立出现的。