ABSTRACT

Five species of Recent brachiopods (Terebratulida), i.e. Xenobrochus parvus (Cooper, 1977), Chlidonophora incerta (Davidson, 1878), Eucalathis ergastica Fischer & Œhlert, 1890, Nanacalathis atlantica Zezina 1991, and Leptothyrella incerta (Davidson, 1880) have been identified in the material collected during the 39th cruise of the RV Professor Logachev in the Russian Exploration Area in the central part of the northern Mid-Atlantic Ridge in February–March 2018. Only Chlidonophora incerta is numerous, the remaining species are very rare. This is the first confirmed occurrence of the genus Xenobrochus from the Atlantic Ocean. The distribution of the studied fauna and its comparison with adjacent regions are also discussed.

摘要

五种近缘腕足动物（Terebratulida），即Xenobrochus parvus（Cooper，1977），Chlidonophora incerta（Davidson，1878），Eucalathis ergastica Fischer＆Œhlert，1890，Nanacalathis atlantica Zezina 1991，和Leptothyrella in880a （David）于2018年2月至3月，在中大西洋北部山脊中部的俄罗斯勘探区RV教授洛加切夫（Logachev）第39次航行中收集到的材料中。只有Chlidonophora incerta数量众多，其余物种非常罕见。这是非洲爪蟾属的首次确诊来自大西洋。还讨论了所研究动物的分布及其与邻近区域的比较。