Portunus floridanus Rathbun, 1930

Rodrigues, Iana Barbosa & Serejo, Irene Azevedo Cardoso and Cristiana Silveira, 2017, Catalogue and illustrated key of Achelous De Haan, 1833 and Portunus Weber, 1795 (Brachyura: Portunidae: Portuninae) species occurring in Brazilian waters, Nauplius (e 2017005) 25, pp. 1-12 : 7-9

Portunus floridanus Rathbun, 1930

( Fig. 4B )

Diagnosis. Carapace narrow, with many short setae, inconspicuous, without strong ridges but with extensive pattern formed by tracts of fine granules.Frontal region with six teeth; median teeth shortest one, submedian teeth blunt and largest than others, and lateral frontal teeth 1 triangular, similar in shape to submedian teeth, and with a single conspicuous central fissure on upper orbital margin. Posterior anterolateral tooth short, strong, larger than adjacent teeth, tips trending forward. Chelipeds long, granulate, with ridges; merus with three to five spines on anterior border and small curved spine at distal end of posterior border; carpus ridged and finely granulate, small outer spine and broad inner spine larger than propodal spine at articulation. Merus of swimming leg longer than wide, armed distally along posterior margin with row of spinules (modified from Williams, 1984).

Measurements. Male, cl 23, cw 47; female, cl 19.5, cw 25 (occasionally 30) ( Williams, 1984). Male holotype, cl 13, cw 20.6, width at anterior base of lateral spine 17.6, fronto-orbital width 11.8; female paratype, cl 15.2, cw 23.2 ( Rathbun, 1930).

Geographic distribution. Western Atlantic: USA (North Carolina) to Honduras and Nicaragua, Antilles, Surinam, Brazil (Paraíba) ( Williams, 1984; Ramos-Porto et al., 2000).

Type locality. Off Key West , Florida ( USA), from coral bottom, 82m.

Habitat. Hard bottom, muddy sand or mud in some localities; at depths of 9 to 640 m, but most common from 60 to 80 m ( Williams, 1984)

Figures

Figure 4. A, Portunus anceps, MNRJ 16515; B, Portunus floridanus (from Rathbun, 1930); C, Portunus sayi (from Rathbun, 1930); D, Portunus ventralis, DOUFPE 7215. Scale bars: A, B, D, 2 cm; C, 3.7 cm.