[4] The large claw of the male is long and whitish, with the carpus lacking a distinct tubercle on the inner margin.

In the United States, the crabs are present along the coast of Florida and on the outer islands of Alabama and Mississippi.

[1][4] The crabs are also present on the Yucatan Peninsula in Mexico, a few islands in the Bahamas, and the western tip of Cuba.

[1][5] The species lives in brackish water on silt or silty sand substrata in intertidal marshes or mangrove thickets.

[4] The range of the species rarely overlaps with the closely related L. spinicarpa, which frequents lower salinity habitat.