Vol. 58, 2019
(update: 2019.05.22; 07.02)
Resurrection of Gelasimus variegatus Heller, 1862,
A Fiddler Crab Closely Related to Austruca
bengali (Crane, 1975) and A.
triangularis (A. Milne-Edwards, 1873) (Decapoda, Brachyura,
Ocypodidae), from the Bay of Bengal, Indian Ocean
Shih1,*, Peter K. L. Ng2, Samuthirapandian
Ravichandran3, and Mani Prema3
of Life Science and Research Center for Global Change Biology, National
Chung Hsing University, Taichung, 402, Taiwan. *Correspondence:
Tel/Fax: 886-4-22856496. E-mail: email@example.com
2Lee Kong Chian Natural History Museum,
National University of Singapore, Singapore 117546, Republic of
3Center of Advanced Study in Marine
Biology, Annamalai University, Parangipettai - 608 502, Tamil Nadu,
Received 20 February 2019 / Accepted 19 May 2019
Communicated by Benny K.K. Chan
identity of the fiddler crab, Gelasimus
variegatus Heller, 1862 (type locality: Madras, India), has long
been uncertain. Examination of specimens from the Bay of Bengal shows
that it is a valid species belonging to the genus Austruca Bott, 1973. Austruca variegata (Heller, 1862)
can be separated from the closely related A. bengali (Crane, 1975) and A. triangularis (A. Milne-Edwards,
1873) by characters of the carapace, orbital floor, major and minor
chelae, male first gonopod, vulva (female gonopore), gastric mill, and
coloration in life. The three species are also supported by genetic
data (nuclear 28S rDNA, mitochondrial 16S rDNA and cytochrome oxidase
subunit I (COI)).
Biogeographically, A. variegata
is distributed in the Bay of Bengal and reaches to the Laccadive Sea; A. bengali is present in the
Andaman Sea; and A. triangularis
is widely distributed in the West Pacific.
Key words: Fiddler crab, Austruca variegata, A. bengali, A. triangularis, Morphology,
Cytochrome oxidase subunit I, 16S rDNA, 28S rDNA.
Citation: Shih HT, Ng PKL, Ravichandran S,
Prema M. 2019. Resurrection of Gelasimus
variegatus Heller, 1862, a fiddler crab closely related to Austruca bengali (Crane, 1975) and A. triangularis (A. Milne-Edwards,
1873) (Decapoda, Brachyura, Ocypodidae), from the Bay of Bengal, Indian
Ocean. Zool Stud 58:12.