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) around the Arabian Sea

Hsi-Te Shih1,*, Mani Prema2,, Anand Jeya Kumar3,, Noor Us Saher4,, Samuthirapandian Ravichandran2, Sahir Odhano5, and Gustav Paulay6

1Department of Life Science and Research Center for Global Change Biology, National Chung Hsing University, Taichung 402, Taiwan. *Correspondence: E-mail: htshih@dragon.nchu.edu.tw (Shih)
2Centre of Advanced Study in Marine Biology, Annamalai University, Parangipettai - 608 502, Tamil Nadu, India. E-mail: premacas196@gmail.com (Prema); sravicas@gmail.com (Ravichandran)
3Department of Marine Biology, Faculty of Marine Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia. E-mail: anandjey08@gmail.com (Kumar)
4Center of Excellence in Marine Biology, University of Karachi, Karachi 75270, Pakistan. E-mail: noorusaher@yahoo.com (Saher)
5Department of Fisheries and Aquaculture, Shaheed Benazir Bhutto University of Veterinary and Animal Sciences, Sakrand- 67210, Sindh, Pakistan. E-mail: aso_sindh@hotmail.com (Odhano)
6Florida Museum of Natural History, University of Florida, Gainesville, FL 32611, USA. E-mail: paulay@flmnh.ufl.edu (Paulay)

MP, AJK, and NUS contributed equally to this paper.
Received 1 January 2022 / Accepted 25 March 2022
Communicated by Benny K.K. Chan

Nine species of fiddler crabs (Crustacea: Ocypodidae: Gelasiminae) are known from the Arabian Sea and adjacent waters (Red Sea, Gulf of Aden, Gulf of Oman and Arabian/Persian Gulf): five species of Austruca, one Cranuca, two Gelasimus and one Tubuca. COI sequence data match morphological species boundaries and shows high connectivity within each. The fauna is highly endemic, with three species of Austruca (A. albimana, A. iranica and A. sindensis) confined to this region, and four other species are restricted to the Indian Ocean. Austruca albimana and A. iranica speciated locally and now have narrowly overlapping ranges in Oman. Our results confirm the westernmost distributions of Austruca annulipes and Tubuca alcocki are Pakistan and the Red Sea, respectively. A key for the nine species is also provided to help identification.

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

Citation: Shih HT, Prema M, Kumar AJ, Saher NU, Ravichandran S, Odhano S, Paulay G. 2022. Diversity and distribution of fiddler crabs (Crustacea: Brachyura: Ocypodidae) around the Arabian Sea. Zool Stud 61:65. doi:10.6620/ZS.2022.61-65.