• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Molluscan Studies >Phylogeny and Biogeography of the Atlantic and Eastern PacificHypselodoris Stimpson, 1855 (Nudibranchia, Chromodorididae) with theDescription of a New Species from the Caribbean Sea
【24h】

Phylogeny and Biogeography of the Atlantic and Eastern PacificHypselodoris Stimpson, 1855 (Nudibranchia, Chromodorididae) with theDescription of a New Species from the Caribbean Sea

机译：大西洋和东太平洋的系统发育和生物地理Hypselodoris Stimpson，1855年（Nudibranchia，Chromodorididae），描述了加勒比海的新物种

获取原文
获取原文并翻译 | 示例
       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A new species, based on two specimens from Guana Island, British Virgin Islands, is described. The new species agrees with the genus Hypselodoris in having a high body profile, a large vestibular gland and mantle glands. It differs from other members of the genus in the Atlantic Ocean by having a reddish background body colour. In addition, dorsal colour patterns such as a broad central white line with lateral extensions and the lack of yellow lines or spots further differentiate this species. The radular formula of 52x41.0.41 and a smaller seminal receptacle are also distinctive. The phylogenetic relationships of 34 species and subspecies of Hypselodoris from the eastern Pacific and Atlantic are examined using morphological characters. With the exception of the new species, these are characterized by a dark blue background body colour. The phylogenetic analysis of the data matrix resulted in eight most-parsimonious trees. The resulting consensus tree shows that eastern Pacific and Atlantic species of Hypselodoris constitute a monophyletic group that is basally split into two sister clades. One clade contains the eastern Pacific species and most of the Caribbean species, whereas the other clade contains the eastern Atlantic species. The new species is the sister to the rest of the Caribbean species, which also form a monophyletic group. This phylogenetic hypothesis suggests that two consecutive vicariant events have affected the biogeography of Hypselodoris: (1) the closure of communication between the tropical Indo-Pacific region and the Atlantic and eastern Pacific, completed with the formation of the East Pacific Barrier; and (2) the rise of the Panama isthmus.
机译：基于来自英属维尔京群岛瓜纳岛的两个标本，描述了一个新物种。该新物种与Hypselodoris属一致，具有较高的身体轮廓，宽大的前庭腺和地幔腺。它与大西洋的其他属不同，其背景色为淡红色。另外，背侧的颜色模式，例如宽的中心白线和侧向延伸以及缺乏黄线或斑点进一步使该物种与众不同。凸形公式为52x41.0.41和较小的精简接收器也很独特。利用形态学特征研究了东太平洋和大西洋地区34个亚属的Hypselodoris的系统发育关系。除新物种外，它们的特征是深蓝色背景体色。数据矩阵的系统发育分析产生了八棵最简约的树木。最终的共识树表明，东太平洋和大西洋的Hypselodoris物种构成了一个单系群，基本分为两个姐妹进化枝。一个进化枝包含东太平洋物种和大部分加勒比物种，而另一进化枝包含东大西洋物种。该新物种是加勒比海其他物种的姊妹，加勒比海其他物种也组成了一个单系群。这种系统发育假说表明，两次连续的维多利亚时代的事件已经影响到了Hypselodoris的生物地理学：（1）印度洋-太平洋区域与大西洋和东太平洋之间的通信关闭，随着东太平洋屏障的形成而完成; （2）巴拿马地峡的兴起。

著录项

相似文献

  • 外文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号