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Dong DONG, Xinzheng LI. Two new species of the genus Munidopsis Whiteaves, 1874 (Crustacea: Anomura: Munidopsidae) from the Caroline Ridge, South of the Mariana Trench[J]. Journal of Oceanology and Limnology, 2021, 39(5): 1841-1853

Two new species of the genus Munidopsis Whiteaves, 1874 (Crustacea: Anomura: Munidopsidae) from the Caroline Ridge, South of the Mariana Trench

Dong DONG1, Xinzheng LI1,2,3,4
1 Department of Marine Organism Taxonomy & Phylogeny, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;
2 Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China;
3 University of Chinese Academy of Sciences, Beijing 100049, China;
4 Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China
The genus Munidopsis has high biodiversity in seamount habitats. In this study, two new Munidopsis species, Munidopsis ahyongi sp. nov. and Munidopsis carolinensis sp. nov. from the Caroline Ridge in the tropical western Pacific Ocean were described. M. ahyongi sp. nov. is very similar to a group of species in the M. serricornis complex, but can be readily distinguished from the related species in having the oblique posterior orbital margins, 2 spines on the lateral carapace margin, and a relatively longer rostral median spine. M. carolinensis sp. nov. is different from two related species primarily in having oblique frontal margins, blunt outer orbital angles, straight lateral margins of the rostrum, scale-like rugae on sternites 5-7, and less spinose pereopod 1 (chelipeds, P1) merus and carpus. Aside from the morphological comparisons, DNA barcode analysis and phylogenetic analysis based on the cytochrome c oxidase subunit I gene (COI) were employed for the identification of these new species.
Key words:    Munidopsis|new species|seamount|tropical western Pacific Ocean|DNA barcodes   
Received: 2020-10-09   Revised: 2020-11-06
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