Portunus anceps ( Saussure, 1858 )

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

Portunus anceps ( Saussure, 1858)

( Fig. 4A )

Material examined. REVIZEE Benthos: #49, 20°31’18”S 29°21’03”W, 50–65 m, 1 male (cw, 2.6 cm; cl 1.6 cm) , MNRJ 16515 .

Diagnosis. Carapace twice wider than long, pubescent, with several indistinct, arching, granulate, transverse ridges. Frontal region with six teeth, median teeth shortest one, submedian teeth largest one, and lateral frontal teeth 1 blunt.Posterior anterolateral tooth sharp, slender, and about as long as space occupied by four preceding teeth, tip trending forward. Chelipeds long; merus with four spines in front, a distal spine behind; carpus ridged, with strong inner and a smaller outer spine. Merus of swimming leg with postero-distal margin oblique, unarmed (modified from Rathbun, 1930 and Williams, 1984).

Measurements. male, cl 13, cw 26; female, cl 15, cw

29 ( Williams, 1984).

Color. Background color off-white, carapace with some brown mottling; Posterior anterolateral tooth of carapace with brown spot at mid length; chelipeds with brown spot dorsally at distal two-thirds, smaller spot distally; carpus, propodus, and basal third of dactylus of cheliped each with brown spot; merus, carpus, and propodus of walking legs with brown spot near midlength; distal segment of fifth leg white ( Manning and Chace, 1990).

Geographic distribution. Western Atlantic: USA (North Carolina, Florida), Bermuda, Gulf of Mexico ( USA, Florida to Mexico, Cancun), Antilles, Brazil (Amapá to Rio de Janeiro) ( Melo, 1996). Central Atlantic: Ascension Island ( Manning and Chace, 1990; Melo, 1996).

Type locality. Cuba .

Habitat. From shallow waters to 20 m. Mainly on sand bottoms, with burying habit, but also on mud, shells, hard substrate, and sea-grass beds ( Manning and Chace, 1990; Melo, 1996).

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.