In this paper we describe the new genus Aglaona, the first abyssal genus of the family Aglajidae, comprising two new species: Aglaona rudmani sp. nov. from the Sea of Okhotsk (inhabiting a depth of 3206 m) and Aglaona valdesi sp. nov. from the Pacific slope of the Kuril Islands (at a depth of 3374–3580 m). For species descriptions and inference of relationships, we have followed an integrative approach, including molecular phylogenetic analyses based on four markers (COI, 16S, H3 and 28S) and a morphological analysis based on traditional anatomical dissections and scanning electron microscopy. The new genus is characterized by a well-developed radula with marginal teeth (2:1:0:1:2) and an internal bulloid shell with a wing-like parietal callus. External and internal morphology of Aglaonagen. nov. species is similar to that of the philinoid genus Laona (family Laonidae). Phylogenetic analyses support the inclusion of the new genus in the family Aglajidae, but its sister-relationships are unresolved. Our results suggest that Aglaonagen. nov. possesses several plesiomorphic characters, and that the reduction of shell and radula in Aglajidae occurred in parallel in different lineages.

中文翻译：

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新属 Aglaona: 第一个深海 aglajid (Heterobranchia: Cephalaspidea: Aglajidae) 描述了来自西北太平洋的两个新物种

在本文中，我们描述了新属 Aglaona，它是 Aglajidae 家族的第一个深海属，包括两个新物种：Aglaona rudmani sp。十一月 来自鄂霍次克海（居住深度为 3206 m）和 Aglaona valdesi sp。十一月 来自千岛群岛的太平洋斜坡（深度为 3374-3580 m）。对于物种描述和关系推断，我们采用综合方法，包括基于四个标记（COI、16S、H3 和 28S）的分子系统发育分析和基于传统解剖解剖和扫描电子显微镜的形态分析。新属的特征是发育良好的齿舌，边缘齿（2:1:0:1:2）和内部的球状壳和翼状顶叶愈伤组织。Aglaonagen的外部和内部形态。十一月 物种类似于 philinoid 属 Laona (family Laonidae)。系统发育分析支持将新属纳入 Aglajidae 家族，但其姐妹关系尚未解决。我们的结果表明，Aglaonagen。十一月 具有多个拟形特征，并且在不同的谱系中，Aglajidae 的壳和 radula 的减少并行发生。