Dana, 1851
Carapace trapezoidal in outline. Posterior margin notably shorter than the front. Frontal margin feebly convex and uniformly finely denticulate, hardly separated from the similarly denticulate supero-internal orbital margin by an indistinct antennal furrow. Basal antennal article straight, with a lateral prolongation closing the orbital hiatus. The two chelipeds conspicuously unequal and dissimilar, the smaller with the palm and fingers narrower and elongated. Ambulatory legs noticeably short and stout; merus of P4 with its length greater than twice the width. All male abdominal segments distinct, movable. Commensal crabs associated with corals. (Guinot 1998)
Type species: Cancer glaberrimus Herbst, 1790.
Species treated:
Tetralia cinctipes Paulson, 1875
Tetralia fulva Serène, 1984
Tetralia glaberrima (Herbst, 1790)
Tetralia glaberrima laevissima Stimpson, 1858
Tetralia nigrolineata Serène & Dat, 1957
Tetralia rubridactyla Garth, 1971