A new species of Gammarus (Crustacea, Amphipoda, Gammaridae) from South Korea

A new species of freshwater gammarid, , was collected from Somaemuldo Island, South Korea. This new species is morphologically characterised by the absence of calceoli in antenna 2, absence of anteroproximal setae on bases in pereopods 6 and 7, outer ramus in uropod 3 with plumose setae on both marg...

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Bibliographic Details
Published in:ZooKeys 2022-08, Vol.1117, p.53-69
Main Authors: Ahn, Yong-Uk, Lee, Chi-Woo, Min, Gi-Sik
Format: Article
Language:English
Subjects:
Amphipoda
Arthropoda
Asia
Crustacea
Eumalacostraca
Far East
Gammaridae
Identification Key
Korea
Malacostraca
Peracarida
South Korea
Systematics
Taxonomy
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Description
Summary:A new species of freshwater gammarid, , was collected from Somaemuldo Island, South Korea. This new species is morphologically characterised by the absence of calceoli in antenna 2, absence of anteroproximal setae on bases in pereopods 6 and 7, outer ramus in uropod 3 with plumose setae on both margins, and a small terminal article of the outer ramus, which is shorter than adjacent spines. A description of the new species and morphological differences from related species are provided in the text. The new species was also compared to related species using partial sequences of the mitochondrial cytochrome oxidase subunit I (COI) gene. Genetic distances of COI sequences between the new species and related species, consisting of 21.5-26.3% difference, support as a valid species. Additionally, a key to identifying species in South Korea is provided.
ISSN:1313-2989
1313-2970
DOI:10.3897/zookeys.1117.89610