Two New Sympatric Aquatic Freshwater Crab Species, Megapleonum taishanense sp. nov. and Cantopotamon chixiense sp. nov. (Crustacea: Brachyura: Potamidae), from Taishan, Guangdong, China.

IF 1.4 3区生物学 Q2 ZOOLOGY

Zoological Studies Pub Date : 2026-03-17 eCollection Date: 2026-01-01 DOI:10.6620/ZS.2026.65-14

Chao Huang, Bernhard Bein, Junda Zhao

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Abstract

Two new species of freshwater crabs are described from a hillstream in Chixi Town, Taishan City, Guangdong Province, China: Megapleonum taishanense sp. nov. and Cantopotamon chixiense sp. nov. The two new species are sympatric and are similar in size, colour and superficial appearance in the field. Inspection of key morphological characters sets them apart as undescribed species from two different genera. Megapleonum taishanense sp. nov. and Cantopotamon chixiense sp. nov. can immediately be separated from their respective congeners by their unique G1 morphology but also their combination of carapace, maxilliped 3 and male pleon characters. A phylogeny constructed using the mitochondrial COI gene places Cantopotamon chixiense sp. nov. in its own clade as sister to C. yangxiense Huang, Ahyong & Shih 2017 and a previous 16S rRNA gene study has already shown that Megapleonum taishanense sp. nov. represents an independent clade within Megapleonum Huang, Shih & Ahyong 2018, supporting the current taxonomic treatment of both new species.

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广东台山两新种同域水生淡水蟹，Megapleonum taishanense sp. 11和Cantopotamon chixiense sp. 11（甲壳纲：短尾目：蟹科）。

在广东省台山市赤溪镇的一条山溪中发现了两种淡水蟹新种：megpleonum taishanense sp. 11和Cantopotamon chixiense sp. 11。这两种新种在野外的大小、颜色和表面外观上相似，是同域的。关键形态特征的检查将它们区分为两个不同属的未描述种。根据其独特的G1形态，以及甲壳、上唇3和雄pleon特征的组合，可以立即将其与各自的同系物区分开。利用线粒体COI基因构建的系统发育将Cantopotamon chixiense sp. 11 .作为C. yangxiense Huang， Ahyong & Shih 2017的姐妹，放置在其自己的分支中，之前的16S rRNA基因研究已经表明，Megapleonum taishanense sp. 11 .在Megapleonum Huang， Shih & Ahyong 2018中代表了一个独立的分支，支持当前对这两个新物种的分类处理。

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来源期刊

Zoological Studies 生物-动物学

CiteScore

2.80

自引率

6.20%

发文量

审稿时长

6-12 weeks

期刊介绍： Zoological Studies publishes original research papers in five major fields: Animal Behavior, Comparative Physiology, Evolution, Ecology, and Systematics and Biogeography. Manuscripts are welcome from around the world and must be written in English. When the manuscript concerns the use of animals or specimens in research, a statement must be included to the effect that the author(s) has adhered to the legal requirements of the country in which the work was carried out or to any institutional guidelines.