Abstract A combination of morphological and genetic data (subunit I of the cytochrome c oxidase: COX1) was used to study the diversity and distribution of pseudotanaids in the Kuril-Kamchatka Trench and adjacent abyssal plain. Our results uncovered the presence of an undescribed species of Mystriocentrus (M. hollandae) and five new species of Pseudotanais (P. chanelae, P. monroeae, P. curieae, P. szymborskae and P. locueloae). The most abundant species was P. curieae (N = 182), followed by P. monroeae (N = 34), P. szymborskae (N = 31) and P. chanelae (N = 20). The number of individuals sampled was highest in shallower stations, but all four taxa could be found across the studied bathymetric range (4800–5500 m). Pseudotanaid abundance and bottom currents appear to be inversely related, which might be due to lower currents favouring sedimentation and, consequently, successful settlement of tanaids. Results are compared with previous studies on peracarid crustaceans from the Northwestern Pacific.

中文翻译：

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来自深海的秘密：来自千岛-堪察加海沟的假鱼科（甲壳类：Tanaidacea）多样性

摘要 结合形态学和遗传学数据（细胞色素 c 氧化酶的亚基 I：COX1），研究了千岛 - 堪察加海沟和邻近深海平原中假单胞菌的多样性和分布。我们的结果发现存在未描述的 Mystriocentrus (M. hollandae) 物种和五种新的 Pseudotanais (P. chanelae、P. monroeae、P. curieae、P. szymborskae 和 P. locueloae)。最丰富的物种是 P. curieae (N = 182)，其次是 P. monroeae (N = 34)、P. szymborskae (N = 31) 和 P. chanelae (N = 20)。在较浅的站点中采样的个体数量最多，但在研究的水深范围（4800-5500 m）中可以找到所有四种分类群。Pseudotanaid 丰度和底流似乎呈负相关，这可能是由于较低的水流有利于沉积，从而成功地解决了 tanaids。结果与之前对西北太平洋的甲壳类甲壳类动物的研究进行了比较。