Data from: The shrimp superfamily Sergestoidea: a global phylogeny with definition of new families and an assessment of the pathways into principal biotopes

The phylogenetic analysis of Sergestoidea based on 253 morphological characters and encompassing all 99 valid species confirmed all previously recognized genus-level clades. Analysis retrieved five major robust clades, which correspond to families Luciferidae, Sergestidae, Acetidae fam.n., Sicyonellidae fam.n., and Petalidiumidae fam.n. Synonymy, emended diagnoses, and composition of revealed family-level clades were provided. Three types of morphological characters were important in phylogeny of Sergestoidea: general external characters, copulatory organs, and photophores. Novel metrics to quantify the contribution of these character types were tested. General external characters were significant in a support of the major clades (80 % families and nearly half of genera). Copulatory characters and photophores greatly supported the medium-level clades: Lucifer, Belzebub, Petalidium, Neosergestes, Challengerosergia (copulatory characters) and Lucensosergia, Challengerosergia, Gardinerosergia, Phorcosergia (photophores). An evolutionary model of Sergestoidea showing their pathways into their principal biotopes is proposed: the major clades evolved in a vertical direction (from epi- to bathypelagic); further divergence at the genus level occurred within a vertical zone in horizontal direction, with the invasion of the benthopelagic and neritic (shelf and estuarine) habitats and speciation within these domains.

基于253个形态学特征、涵盖该总科全部99个有效物种的莹虾总科（Sergestoidea）系统发育分析，确认了此前所有已被识别的属级演化分支。本次分析恢复得到5个高支持率的主要演化支，分别对应亮虾科（Luciferidae）、樱虾科（Sergestidae）、Acetidae新科（Acetidae fam.n.）、Sicyonellidae新科（Sicyonellidae fam.n.）以及Petalidiumidae新科（Petalidiumidae fam.n.）。本研究对上述科级演化支的同物异名、修订鉴别特征以及类群组成进行了系统阐述。
三类形态学特征对莹虾总科的系统发育构建具有关键意义：一般外部形态特征、交配器官以及发光器（photophores）。本研究测试了用于量化这些特征类型贡献的新型指标。其中，一般外部形态特征对主要演化支的支持效果显著，可支撑80%的科级类群以及近半数的属级类群。交配器官特征与发光器则对中等层级的演化支具有较强的支持作用：交配器官特征支持的演化支包括Lucifer属、Belzebub属、Petalidium属、Neosergestes属以及Challengersergia属；发光器支持的演化支包括Lucensosergia属、Challengersergia属、Gardinerosergia属以及Phorcosergia属。
本研究还提出了莹虾总科的演化模型，阐明了其向主要栖息生境的演化路径：主要科级演化支沿垂直维度发生演化（从上层浮游生境向深海浮游生境过渡）；随后属级类群在同一垂直带内沿水平维度发生进一步分化，同时伴随底栖浮游生境与浅海（陆架与河口）生境的入侵，并在这些生境域内发生物种形成事件。