Abstract Trapania is a genus of dorid nudibranchs and one of the lesser studied members in the family Goniodorididae. Previous studies have been limited to using morphological data for producing phylogenies and establishing species relationships. This study presents the first molecular phylogeny for the genus Trapania with the goal of resolving questions that surfaced in previous morphological studies and enhancing our understanding of Trapania clade structure and species relationships. Bayesian inference, maximum likelihood and two types of species delimitation analyses reveal 15 previously described species and nine new species, which are described: Trapania kahel sp. nov., Trapania kamagong sp. nov., Trapania kanaloa sp. nov., Trapania lemanioides sp. nov., Trapania stegodon sp. nov., Trapania tamaraw sp. nov., Trapania tatsulok sp. nov., Trapania tigger sp. nov. and Trapania undulata sp. nov. Preliminary evidence presented here suggests that Atlantic and eastern Pacific species form a distinct clade and diverged from ancestors that were more widespread. An Indo-Pacific clade is sister to this clade, but stronger support and broader taxon sampling are required to test this hypothesis.

中文翻译：

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鳃外过程表现出额外的多样性：Trapania 属（Nudibranchia：Goniodorididae）的系统学和九个新物种描述

摘要 Trapania 是海蛞蝓的一个属，是Goniodorididae 家族中研究较少的成员之一。以前的研究仅限于使用形态学数据来产生系统发育和建立物种关系。这项研究提出了 Trapania 属的第一个分子系统发育，目的是解决以前形态学研究中出现的问题，并增强我们对 Trapania 进化枝结构和物种关系的理解。贝叶斯推断、最大似然和两种类型的物种划界分析揭示了 15 个先前描述的物种和 9 个新物种，它们被描述为：Trapania kahel sp。11 月，Trapania kamagong sp。十一月，Trapania kanaloa sp。十一月，Trapania lemanioides sp。十一月，Trapania stegodon sp。十一月，Trapania tamaraw sp。十一月，Trapania tatsulok sp. 十一月，特拉帕尼亚跳跳虎 sp。十一月 和 Trapania undulata sp。十一月 这里提供的初步证据表明，大西洋和东太平洋物种形成了一个独特的进化枝，并与更广泛的祖先不同。印度-太平洋进化枝是这个进化枝的姐妹，但需要更强大的支持和更广泛的分类群抽样来检验这一假设。