Scientific Name: Metopograpsus quadridentatus (Stimpson, 1858)

Synonym: Pachygrapsus quadratus (Currently unaccepted)

English Name: Four-toothed Rock Crab
Four-toothed Rock Crab - - Metopograpsus quadridentatus - Type: Crab

Photo: 鐦鍆錒/锎钔锕(Man Hoimoon (iNaturalist)

Classification:
Kingdom: Animalia
Phylum: Arthropoda
Class: Malacostraca
Order: Decapoda
Family: Grapsidae
Description:
The broad, somewhat flattened carapace has a somewhat conves form. It is distinguished by a text that ranges from smooth to granular and typically has a central ridge and well-defined lateral edges. To blend in with rocky or intertidal settings, the coloration usually consists of shades of gray or how frequently accompanied by mottling or banding. Both claws are usually about the same size, and the chelipeds are strong. They are smooth on the outside and feature pointed sharp ends.Walking legs are long and thin, designed for mangrove areas and rocky terrain, as well as climbing With pointed tips for a secure grip, the legs are either smooth or slightly grainy. The eyes are situated on short, retractable stalks and are somewhat big. The crab can shield its ryu from possible harm thanks to this. Situated between the eyes, the antennae are small and pointed. The abdomen is segmented and seems to be thin, folded beneath the thorax.
Habitat & Distribution in Bangladesh:
St. Martin’s Island, Cox’s Bazar, Sundarbans areas
Environment:
Marine
References:

Islam, M.T., & Bhuyan, M.S. (2025). Marine crabs of Bangladesh: An Illustrative Guide (1st ed.). Bangladesh Oceanographic Research Institute (BORI) ISBN : 978-984-35-8048-1

DNA Barcodes from Bangladesh
GenBank Accession Number:
Other DNA Barcodes & Nucleutide Sequences
IUCN conservation status:
Other Information