A critical revision of the churchill snoutfish, genus <i>Petrocephalus</i> Marcusen, 1854 (Actinopterygii: Teleostei: Mormyridae), from southern and eastern Africa, with the recognition of <i>Petrocephalus tanensis</i>, and the description of five new species

We morphologically and genetically studied the southern African electric fish <i>Petrocephalus catostoma</i>, or churchill, and its six nominal species, five of which by synonymization (three valid subspecies). We reinstate the synonymized species, and recognize <i>Petrocephalus tanensis</i> (Whitehead and Greenwood, 1959) from the Tana River in Kenya, also using electric organ discharges. The Okavango delta (Botswana) is inhabited by <i>Petrocephalus okavangensis</i><b>sp. nov.</b> and <i>Petrocephalus magnitrunci</i><b>sp. nov.</b>, and the Namibian Cunene River by <i>Petrocephalus magnoculis</i><b>sp. nov.</b> We recognize <i>Petrocephalus petersi</i><b>sp. nov.</b> for the Lower Zambezi River (Mozambique), and <i>Petrocephalus longicapitis</i><b>sp. nov.</b> for the Upper Zambezi River (Namibia). The Lufubu River in Northern Zambia is inhabited by <i>Petrocephalus longianalis</i><b>sp. nov.</b> For the southern churchill, <i>Petrocephalus wesselsi</i> Kramer and Van der Bank, 2000, we confirm intraspecific and interspecific differentiation. Sequence data from mitochondrial DNA confirm differentiation of two new western and two eastern species, forming mutual sister groups.

我们对南部非洲电鱼（electric fish）卡氏壮颌电鲶（Petrocephalus catostoma，俗称"丘吉尔电鱼"）及其6个定名物种开展了形态学与遗传学研究，其中5个物种被归为同物异名，仅保留3个有效亚种。本研究恢复了此前被异名化的物种有效性，并结合电器官放电特征，确认肯尼亚塔纳河产的塔纳壮颌电鲶（Petrocephalus tanensis，Whitehead & Greenwood, 1959）为有效物种。博茨瓦纳奥卡万戈三角洲栖息有奥卡万戈壮颌电鲶（Petrocephalus okavangensis）sp. nov.与大躯壮颌电鲶（Petrocephalus magnitrunci）sp. nov.；纳米比亚库内内河则栖息有大眼壮颌电鲶（Petrocephalus magnoculis）sp. nov.。针对莫桑比克境内赞比西河下游的类群，我们将其命名为彼氏壮颌电鲶（Petrocephalus petersi）sp. nov.；纳米比亚境内赞比西河上游的类群则被定为长头壮颌电鲶（Petrocephalus longicapitis）sp. nov.。赞比亚北部的卢富布河栖息有长肛壮颌电鲶（Petrocephalus longianalis）sp. nov.。针对南部丘吉尔电鱼，即韦瑟尔斯壮颌电鲶（Petrocephalus wesselsi，Kramer & Van der Bank, 2000），我们确认了其种内与种间的分化特征。线粒体DNA（mitochondrial DNA）序列数据证实，2个新发现的西部类群与2个东部类群分别构成互为姊妹群的单系类群。

搜集汇总

背景与挑战

背景概述

该数据集聚焦于非洲南部和东部丘吉尔吻鱼属（Petrocephalus）的分类学修订研究，通过形态学和遗传学方法识别了Petrocephalus tanensis物种，并描述了五个新物种，同时利用线粒体DNA序列数据验证了物种分化。数据集作为Journal of Natural History期刊文章的补充材料，发布于2012年，提供了原始研究数据以支持鱼类分类学分析。