Molecular evidence and differences in gonopod morphology lead to the recognition of a new species of the freshwater crab genus Candidiopotamon Bott, 1967 (Crustacea, Brachyura, Potamidae) from eastern Taiwan

A new freshwater crab of the potamid genus Bott, 1967, is described from eastern Taiwan. sp. nov. is morphologically similar to (De Man, 1914) from western Taiwan, but can be distinguished by the morphology of the male first gonopod (G1), as well as by their mitochondrial DNA (16S rRNA and COI genes...

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Bibliographic Details
Published in:ZooKeys 2023-09, Vol.1179 (1), p.169-196
Main Authors: Shih, Hsi-Te, Naruse, Tohru, Schubart, Christoph D
Format: Article
Language:English
Subjects:
Analysis
Candidiopotamon
Candidiopotamon rathbuni
Crustaceans
Cytochrome
Females
Identification keys
Islands
Life sciences
Mitochondrial DNA
Molecular Systematics
Morphology
Morphology (Animals)
Museums
New species
Physical characteristics
Potamidae
rRNA 16S
Taxonomy
Zoology
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Description
Summary:A new freshwater crab of the potamid genus Bott, 1967, is described from eastern Taiwan. sp. nov. is morphologically similar to (De Man, 1914) from western Taiwan, but can be distinguished by the morphology of the male first gonopod (G1), as well as by their mitochondrial DNA (16S rRNA and COI genes). In the G1 of , the subterminal segment shows a cline from robust in northern populations to slender in southern populations. In the G1 of , a distinctly larger and more distally directed keel-like projection is found on the distal inner edge of the terminal segment, with northern populations having an inward-curving subterminal segment and southern populations a straight subterminal segment. The genetic differentiation of the two species of within Taiwan is discussed, and morphological differences are compared. A key to the species of is also provided.
ISSN:1313-2989
1313-2970
DOI:10.3897/zookeys.1179.106718