Vol. 59, 2020
(update: 2020.05.22; 07.10)
What is Sesarmops impressus (H. Milne
Edwards, 1837) (Crustacea: Brachyura: Sesarmidae)?
K. L. Ng1, Jheng-Jhang,Li2,3, and Hsi-Te Shih4,*
Kong Chian Natural History Museum, National University of Singapore, 2
Conservatory Drive, Singapore 117377, Republic of Singapore. E-mail:
2Department of Marine Biotechnology and Resources,
National Sun Yat-sen University, 70, Lianhai Road, Kaohsiung 80424,
Taiwan. E-mail: firstname.lastname@example.org (Li)
3East Peak Ecological Consultants, Inc., 22, Wanggong
Road, Linyuan Dist., Kaohsiung 83249, Taiwan
4Department of Life Science and Research Center for
Global Change Biology, National Chung Hsing University, 250, Kuo Kuang
Road, Taichung 402, Taiwan. *Correspondence: E-mail:
(Received 28 March 2020 / Accepted 13
Communicated by Benny K.K. Chan
identity of the widely distributed mangrove and riverine sesarmid crab Sesarmops impressus (H. Milne
Edwards, 1837) is clarified. The species has been reported from
Madagascar to the South Pacific, but its taxonomy was previously
confused. On the basis of morphological characters and available
molecular evidence (using 16S rDNA and cytochrome oxidase subunit I),
Sesarmops impressus is restricted to the western Indian Ocean and S. frontale A. Milne-Edwards, 1869
is confirmed to be its junior synonym. Sesarmops similis (Hess, 1865),
long synonymised under S. impressus,
is here recognised as a separate species and a neotype from Samoa is
designated. The identity of the poorly known S. atrorubens (Hess, 1865), which
has often been confused with S.
impressus, is also clarified, and a neotype is selected from
Fiji. Specimens from the eastern Indian Ocean and western Pacific are
here identified as two new species, S.
indicus sp. nov. and S.
imperator sp. nov.
Taxonomy, New species, Sesarmops
impressus, S. indicus,
S. imperator, S. atrorubens, S. similis, Morphology,
Mitochondrial 16S rDNA,
Cytochrome oxidase subunit I.
Ng PKL, Li JJ, Shih HT. 2020. What is Sesarmops impressus (H. Milne
Edwards, 1837) (Crustacea: Brachyura: Sesarmidae)? Zool Stud 59:27. doi:10.6620/ZS.2020.59-27.
Erratum: Erratum notice