Zoological Studies

Vol. 61, 2022

(update: 2022.11.16)

Special issue: Systematics and Biogeography of Fiddler Crabs (articles 64–71). Editors: Hsi-Te Shih and Benny K. K. Chan

Diversity and Distribution of Fiddler Crabs (Crustacea: Brachyura: Ocypodidae) in Vietnam

Hsi-Te Shih1,*, Kingsley J. H. Wong2, Benny K. K. Chan2,*, Thanh Son Nguyen3, Van Tu Do4,5, Xuan Quang Ngo5,6, and Pei-Yi Hsu1

1Department of Life Science and Research Center for Global Change Biology, National Chung Hsing University, Taichung 402, Taiwan. E-mail: htshih@dragon.nchu.edu.tw (Shih); n900370@gmail.com (Hsu)
2Biodiversity Research Center, Academia Sinica, Taipei 115, Taiwan. *Correspondence: E-mail: chankk@gate.sinica.edu.tw (Chan). E-mail: kingsleythelynx@gmail.com (Wong)
3Department of Applied Zoology, Faculty of Biology, VNU University of Science, Vietnam National University, Ha Noi, Vietnam. E-mail: sonnt@hus.edu.vn (Nguyen)
4Institute of Ecology and Biological Resources (IEBR), Vietnam Academy of Science and Technology (VAST), Ha Noi, Vietnam. E-mail: dovantu.iebr@gmail.com (Do)
5Graduate University of Science and Technology (GUST), Vietnam Academy of Science and Technology (VAST), Ha Noi, Vietnam
6Department of Environmental Management and Technology, Institute of Tropical Biology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam. E-mail: ngoxuanq@gmail.com (Ngo)

Received 6 January 2022 / Accepted 7 April 2022
Communicated by Ryuji Machida

Based on recently collected material and records in the literature, 14 species of fiddler crabs (Crustacea: Ocypodidae: Gelasiminae) are reported from Vietnam. DNA barcoding analyses using the mitochondrial gene COI (cytochrome c oxidase subunit I) was performed to identify examined materials and their precise distributional range. Thirteen species-level taxa are identified and, with the exception of Galsimus borealis and G. vocans, have minimum interspcific divergences of at least 7.27%. The identified species include seven species of Tubuca Bott, 1973, three of Austruca Bott, 1973 and three of Gelasimus Latreille, 1817, and one Paraleptuca Bott, 1973. Two new records of Vietnam are herein reported: Tubuca rhizophorae and T. dussumieri. The southernmost distribution limits of East Asian G. borealis, T. acuta and T. arcuata
are in northern Vietnam, A. lactea in central Vietnam, whereas northernmost limit of Southeast Asian T. rhizophorae and T. forcipata in southern Vietnam. A dichotomous key to identify the 14 Vietnamese species is provided.

Key words: Fiddler crabs, New records, Austruca, Gelasimus, Paraleptuca, Tubuca, Mitochondrial cytochrome c oxidase subunit I (COI), Barcodes.

Citation: Shih HT, Wong KJH, Chan BKK, Nguyen TS, Do VT, Ngo XQ, Hsu PY. 2022. Diversity and distribution of fiddler crabs (Crustacea: Brachyura: Ocypodidae) in Vietnam. Zool Stud 61:66. doi:10.6620/ZS.2022.61-66.