The abyssal and hadal Buccinoidea from the north-western Pacific formerly attributed to the genera Tacita and Calliloncha were analyzed for the first time using both multilocus molecular and morphological data. The results allow re-evaluation of the inter- and intrageneric variability of morphological characters and demonstrate that Tacita, Calliloncha and Paracalliloncha are synonyms of Bayerius, a genus widely distributed in the Pacific Ocean. In our reconstructed phylogeny the genus forms a maximally supported clade with Pararetifusus tenuis and Turrisipho dalli. At present, Bayerius includes 10 species, two of which are described herein as new to science, B. inflatus sp. nov. and B. nekrasovorum sp. nov. with one additional undescribed species represented in our material by a single specimen. The genus is reviewed, with the addition of new data on anatomy and distribution, based on newly obtained material. B. peruvianus is synonymized with B. zenkewitchi. Calliloncha nankaiensis together with Costaria crosnieri are attributed to a new genus, Warenius gen. nov., which clusters with several genera of Buccinoidea from biogenic substrata.

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中文翻译：

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回顾西北太平洋的深渊哈德氏菌属Bayerius（天麻：新腹足纲：Buccinidae），并描述了两个新物种

使用多位点分子和形态学数据首次分析了西北太平洋的深渊和hadal Buccinoidea，其先前归因于Tacita和Calliloncha属。结果允许重新评估形态特征之间和内部的变异性，并证明Tacita，Calliloncha和Paracalliloncha是Bayerius的同义词，Bayerius是在太平洋中广泛分布的属。在我们重建的系统发育史中，该属与Pararetifusus tenuis和Turrisipho dalli形成了最大程度的支持进化枝。目前，Bayerius包括10个物种，其中两个在本文中被描述为对B. inflatus sp。来说是新的。十一月 和B. nekrasovorum sp。十一月 在我们的资料中，另外一个未描述的物种由一个样本代表。根据新获得的材料，对该属进行了审查，并增加了有关解剖和分布的新数据。B. peruvianus是B. zenkewitchi的同义词。南美海象Calliloncha nanastensis和Costaria crosnieri一起归因于一个新属，Warenius属。十一月，它与来自生物基层的Buccinoidea的几个属聚集在一起。

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