White, 1846
Carapace subcircular or suboval, its dorsal surface with well defined grooves (at least gastro-cardiac, cervical and thoracic grooves present). Rostrum generally trilobate, sometimes obscurely so due to fusion or reduced size of lateral lobes. Epistome short, its breadth about two times its length. Third maxillipeds broad, nearly filling the mouth field; ischium not much shorter than merus along lateral edge. Chelipeds stouter than ambulatory legs, especially in large males. Male 1st pleopod either with distal portion thin, strongly curved towards abdomen, and with very short setae, or distal portion thin to moderately stout, little curved and with long setae. (Türkay 1995)
Species treated:
Halicarcinus coralicola (Rathbun, 1909)
Halicarcinus hondai (Takeda & Miyake, 1971)
Halicarcinus messor (Stimpson, 1858)
Halicarcinus orientalis Sakai, 1932
Halicarcinus setirostris (Stimpson, 1858)