During two expeditions to seamounts near the Mariana Trench in the tropical western Pacific, several trochiform shells from the upper bathyal zone were sampled. Morphological observations of these specimens suggest that they represent two new species that belong to the family Trochidae, but the shell morphology, radular plan, and external anatomy differ considerably from those of closely related genera. A new subfamily, Carinotrochinae subfam. nov., and a new genus, Carinotrochus gen. nov., are proposed herein to accommodate these two species. Carinotrochus marianaensis sp. nov., the type species, was associated with coral debris at a depth of 865 m, and Carinotrochus williamsae sp. nov. was discovered crawling on a hydroid Stegolaria sp. that was attached to a dead bamboo coral at a depth of 1332 m. Genertic analysis of mitochondrial COI, 16S rRNA, and nuclear 28S rRNA genes using maximum likelihood, Bayesian inference, and pairwise uncorrected p-distances confirmed that the new taxa are trochids but do not belong to any existing defined subfamily. Molecular clock analysis based on concatenated sequences (COI, 16S, and 28S) indicated that Carinotrochinae subfam. nov. split from its shallow water sister subfamily Trochinae roughly 80 Mya during the Late Cretaceous.

在两次对热带西太平洋马里亚纳海沟附近海山的考察中，从上部的海底带采样了数个梭壳形贝壳。这些标本的形态学观察表明，它们代表着属于Trochidae科的两个新物种，但是壳的形态，球根计划和外部解剖学与密切相关的属大为不同。一个新的亚科Carinotrochinae亚科。十一月，以及一个新的属Carinotrochus gen。本文中提出了Nov.，以容纳这两个物种。Carinotrochus marianaensis sp。该类型物种nov。与865 m深度的珊瑚碎片和Carinotrochus williamsae sp。相关。十一月 被发现在水生的剑兰上爬行sp。它被固定在1332 m深度的死竹珊瑚上。使用最大可能性，贝叶斯推断和成对的未校正p距离对线粒体COI，16S rRNA和核28S rRNA基因进行了遗传分析，证实了新的类群是曲足类，但不属于任何现有的已定义亚科。基于串联序列（COI，16S和28S）的分子时钟分析表明，中华肉芽孢杆菌亚家族。十一月 在白垩纪晚期从其浅水姐妹亚属Trochinae分裂出大约80个Mya。