Leptocheliidae
Guides
Hargeria rapax
Hargeria rapax is a small estuarine tanaidacean crustacean endemic to the western Atlantic. Originally described as Leptochelia rapax from Massachusetts in 1879, it was later transferred to the monotypic genus Hargeria based on distinctive male morphological characters. The species exhibits high intraspecific polymorphism and was long considered to have a broad distribution from New England to the Mexican Caribbean, though molecular evidence now supports the recognition of a cryptic sister species, H. chetumalensis, in the southern part of this range.