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Issue: Vol. 5361 No. 2: 1 Nov. 2023
Type: Article
Published: 2023-11-01
DOI: 10.11646/zootaxa.5361.2.8
Page range: 275-286
Abstract views: 306
PDF downloaded: 16

A new species of the coral-symbiont crab genus Cymo de Haan, 1833 (Decapoda, Brachyura, Xanthidae) from Nansha Islands, the South China Sea

Laboratory of Marine Organism Taxonomy and Phylogeny; Institute of Oceanology; Chinese Academy of Sciences; Qingdao; China; University of Chinese Academy of Sciences; Beijing; China
Laboratory of Marine Organism Taxonomy and Phylogeny; Institute of Oceanology; Chinese Academy of Sciences; Qingdao; China; Shandong Province Key Laboratory of Experimental Marine Biology; Institute of Oceanology; Chinese Academy of Sciences; Qingdao; China; Laoshan Laboratory; Qingdao; China
Laboratory of Marine Organism Taxonomy and Phylogeny; Institute of Oceanology; Chinese Academy of Sciences; Qingdao; China; Shandong Province Key Laboratory of Experimental Marine Biology; Institute of Oceanology; Chinese Academy of Sciences; Qingdao; China; Laoshan Laboratory; Qingdao; China
Crustacea Cymo mazu Cymoinae coral reef Nansha Islands DNA barcode

Abstract

A new species of coral-symbiont crab, Cymo mazu sp. nov., is described from the Nansha Islands in the South China Sea. The new species is distinguished from its congeners by several unique morphological characteristics, including a smooth carapace armed with isolated spiny granules, chelipeds featuring large spines and granules, and a strongly concave endopodite of the first maxilliped. Molecular analysis using mitochondrial cytochrome oxidase I DNA barcodes provides further support for the identification of the new species. The relationships between the new species and its congeners were elucidated through a combination of morphological and molecular evidence. Diagnostic characteristics for differentiation among species of Cymo are discussed, and an updated key to the species of the genus is provided.

 

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