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Issue: Vol. 5673 No. 2: 5 Aug. 2025
Type: Article
Published: 2025-08-05
DOI: 10.11646/zootaxa.5673.2.3
Page range: 213-226
Abstract views: 60
PDF downloaded: 2

Morphological and molecular characterization of Heterosaccus papillosus Boschma, 1933 (Rhizocephala: Sacculinidae) and its effects on the swimming crab Charybdis anisodon De Haan, 1850 (Decapoda: Portunidae) in Nha Trang Bay, Vietnam

Joint Vietnam-Russia Tropical Science and Technology Research Center; 30 Nguyen Thien Thuat st.; Nha Trang Ward; Khanh Hoa province; Vietnam; Institute for Biotechnology and Environment; Nha Trang University; 02 Nguyen Dinh Chieu st.; Bac Nha Trang Ward; Khanh Hoa province; Vietnam
Joint Vietnam-Russia Tropical Science and Technology Research Center; 30 Nguyen Thien Thuat st.; Nha Trang Ward; Khanh Hoa province; Vietnam
Joint Vietnam-Russia Tropical Science and Technology Research Center; 30 Nguyen Thien Thuat st.; Nha Trang Ward; Khanh Hoa province; Vietnam
Joint Vietnam-Russia Tropical Science and Technology Research Center; 30 Nguyen Thien Thuat st.; Nha Trang Ward; Khanh Hoa province; Vietnam
Institute for Biotechnology and Environment; Nha Trang University; 02 Nguyen Dinh Chieu st.; Bac Nha Trang Ward; Khanh Hoa province; Vietnam
Institute for Biotechnology and Environment; Nha Trang University; 02 Nguyen Dinh Chieu st.; Bac Nha Trang Ward; Khanh Hoa province; Vietnam
Marine Biodiversity; Department of Biology; University of Bergen; Thormøhlensgate 53a; Box 7800 N-5020; Bergen; Norway; CMEC; Globe Institute; University of Copenhagen; Universitetsparken 15; Bld. 3; 2nd floor; DK2100; Copenhagen Ø; Denmark
Institute for Biotechnology and Environment; Nha Trang University; 02 Nguyen Dinh Chieu st.; Bac Nha Trang Ward; Khanh Hoa province; Vietnam
Externa 18S rDNA COI mtDNA phylogeny prevalence impact feminization

Abstract

Rhizocephala parasites, particularly Heterosaccus papillosus (Boschma), profoundly affect the morphology and physiology of their crustacean hosts, including the economically valuable swimming crab Charybdis anisodon (De Haan). This study provides a comprehensive analysis of H. papillosus in Vietnam, integrating detailed morphological description with molecular phylogenetic analysis using 18S rDNA and COI mtDNA. We confirm the parasite’s identity but uncover a substantial COI mtDNA divergence compared to GenBank sequences. This study documented an 11% infection rate, with host sex and size influencing prevalence. Notably, H. papillosus induced significant morphological modifications in C. anisodon, including abdominal segment expansion in males and pleopod degeneration in both sexes. These results emphasize the need for integrated taxonomic approaches and highlight the substantial impact of rhizocephalan parasitism on economically significant crab populations.

 

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How to Cite

Oanh, L.T.K., Hoang, A.T.N., Vu, T.Q., Ha, V.T., Tran, S.Q., Truong, O.T., Glenner, H. & Dang, B.T. (2025) Morphological and molecular characterization of Heterosaccus papillosus Boschma, 1933 (Rhizocephala: Sacculinidae) and its effects on the swimming crab Charybdis anisodon De Haan, 1850 (Decapoda: Portunidae) in Nha Trang Bay, Vietnam. Zootaxa, 5673 (2), 213–226. https://doi.org/10.11646/zootaxa.5673.2.3