A New Small Barb (Cyprininae: Smiliogastrini) from the Louesse, Lekoumou (Upper Niari Basin), and Djoulou (Upper Ogowe Basin) Rivers in the Republic of Congo, West-Central Africa

IF 1.1 3区环境科学与生态学 Q3 BIODIVERSITY CONSERVATION American Museum Novitates Pub Date : 2018-12-26 DOI:10.1206/3917.1

V. Mamonekene, A. Zamba, M. Stiassny

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引用次数: 7

Abstract

ABSTRACT A new species of smiliogastrin cyprinid is described from the Louesse, Lekoumou (upper Niari basin), and Djoulou (upper Ogowe basin) rivers in the Republic of Congo, west-central Africa. The new species is readily distinguished from congeners by the presence of a flexible, weakly ossified and smooth bordered last unbranched dorsal-fin ray, well-developed barbels, and a straight and complete lateral line in combination with a characteristic pigmentation patterning consisting of a distinctive, rounded black spot at the base of and extending over the first rays of the anal fin and a prominent, darkly pigmented blotch over the base of the anterior dorsal-fin rays. A combination of morphological features and pigmentation patterning that appears to be unique among Enteromius. The new species is widespread throughout the Louesse-Djoulou region, and the fact that such a seemingly common species has gone undetected until now serves to underscore how poorly known this region of the Republic of Congo remains.

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中非西部刚果共和国Louesse河、Lekoumou河（上尼亚里盆地）和Djolou河（上奥戈韦盆地）的一种新的小Barb（Cypriinae：Smiliogastrini）

摘要在非洲中西部刚果共和国的Louesse河、Lekoumou河(Niari盆地上游)和Djoulou河(Ogowe盆地上游)中发现了一新种smiliogastrin cyprinid。这个新物种很容易与同类区分开来，因为它有一条灵活的、弱骨化的、光滑的、最后不分叉的背鳍鳍线，发育良好的倒刺，一条笔直而完整的侧线，以及典型的色素沉着图案，包括一个独特的、圆形的黑点，位于臀鳍的第一道鳍的底部，延伸到臀鳍的第一道鳍上，在前背鳍鳍的底部有一个突出的、深色的斑点。一种形态特征和色素沉着模式的结合，在肠属中似乎是独一无二的。这种新物种在Louesse-Djoulou地区分布广泛，而这种看似常见的物种直到现在才被发现，这一事实突显了刚果共和国这一地区仍然知之甚少。

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来源期刊

American Museum Novitates 环境科学-动物学

CiteScore

3.00

自引率

6.70%

发文量

审稿时长

>36 weeks

期刊介绍： The Novitates (Latin for "new acquaintances"), published continuously and numbered consecutively since 1921, are short papers that contain descriptions of new forms and reports in zoology, paleontology, and geology.