Laboratory of Bioecology and Crustacean Systematics (LBSC), Department of Biology, Faculty of Philosophy, Sciences and Letters at Ribeirão Preto (FFCLRP), University of São Paulo (USP), Avenida Bandeirantes 3900, CEP 14040-901, Ribeirão Preto, São Paulo, Brazil.
Oxford University Museum of Natural History, Parks Road, Oxford, OX1 3PW, UK.
Sci Rep. 2017 Jul 27;7(1):6697. doi: 10.1038/s41598-017-06756-1.
Hippolyte is a genus of small bodied marine shrimps, with a global distribution. Here, we studied the phylogenetic and biogeographic relationships amongst the species of this genus with two mitochondrial and two nuclear markers, using Bayesian Inference, Maximum Likelihood, genetic divergence, molecular clock and S-DIVA. In addition, the Indo-West Pacific genus Alcyonohippolyte was included. Based on sequences from 57 specimens of 27 species, we recovered a robust biogeographic scenario that shows the Indo-West Pacific as the probable ancestral area of the genus Hippolyte, which emerged in the Paleocene, followed by dispersal in three general directions: (1) South Pacific, (2) eastern Atlantic and Mediterranean Sea and (3) Americas, the latter with a primary colonization in the eastern Pacific followed by a radiation into the western Atlantic. Our analysis reveals that the species of the H. ventricosa group do not constitute a monophyletic group and Alcyonohippolyte does not constitute a reciprocally monophyletic group to Hippolyte, with both genera herein synonimised. The relationships and systematic status of several transisthmian and Atlantic species are clarified.
希波利特（Hippolyte）是一个小型海洋虾类属，分布于全球。在这里，我们使用贝叶斯推断、最大似然法、遗传分歧、分子钟和 S-DIVA 方法，研究了该属物种的系统发育和生物地理关系，使用了两个线粒体和两个核标记。此外，还包括了印度洋-西太平洋属 Alcyonohippolyte。基于来自 57 个 27 个物种的标本的序列，我们恢复了一个强有力的生物地理情景，表明印度洋-西太平洋是 Hippolyte 属的可能祖先区域，该属起源于古新世，随后在三个主要方向上扩散：（1）南太平洋，（2）东大西洋和地中海，（3）美洲，后者在东太平洋的首次殖民化后，辐射到西大西洋。我们的分析表明，H. ventricosa 组的物种不构成单系群，而 Alcyonohippolyte 也不构成 Hippolyte 的互惠单系群，这两个属在此处被同义化。澄清了几个地峡和大西洋物种的关系和系统地位。
