Achelous ordwayi Stimpson, 1860

Achelous ordwayi Stimpson, 1860 View in CoL

( Fig. 2B View Figure 2 )

Material examined. REVIZEE PESCA: # A1 , 19°43’55”S 38°21’54”W, 72 m, 1 male (cw 3.5; cl 2.5) and 1 female (cw 3.4; cl 2.4), MNRJ 17068 View Materials ; REVIZEE BENTHOS: #5, 20 m, 1 male (cw 3.6; cl 2.5) , MNRJ 16244 View Materials .

Diagnosis. Carapace approximately 1.5 times wider than long, uneven, elevations granulate and depressions pubescent, with a number of conspicuous, curving transverse ridges; margin more or less fringed with silky hair, as well as the chelipeds. Frontal region with six teeth; median teeth and submedian teeth about equal in size, strong and well defined, triangular, acute, median teeth advanced beyond others; acuminate lateral frontal teeth 1. Posterior anterolateral tooth about as long as space occupied by 2 preceding teeth, tips of all acute and turned forward. Chelipeds of moderate length; merus with four to six strong spines in front, single distal spine behind; carpus ribbed, with strong internal and much smaller external spine. Merus of swimming leg without posterodistal lobe but spinulose (modified from Williams, 1984).

Measurements. Carapace: male, cl 33, cw 49; ovigerous female, cl 32, cw 50 ( Williams, 1984). Female, cl 33.3, cw 47, width at anterior base of lateral spine 41.6 ( Rathbun, 1930).

Color. Carapace and legs reddish brown because of fine mottling with red, yellowish brown and gray; pale orange beneath, deeper orange on chelipeds and legs; chelae deep red brown above, finger with 2 cross bands of light orange red. Blue coloration also apparent near red and dark pigments; hairs on appendages deep red ( Williams, 1984).

Geographic distribution. Western Atlantic: USA (Massachusetts to Florida), Gulf of Mexico ( USA, Florida to Mexico, Cancun), Antilles, Venezuela, Guyana and Brazil (Amapá to Rio Grande do Sul, and Fernando de Noronha) ( Melo, 1996).

Type localities. Key Biscayne and Tortugas (Florida,

USA), St. Thomas.

Habitat. From surface to 110 m. On sand, gravel, broken shells and coral bottom ( Melo, 1996).