Speocarcinus amazonicus Brandão, Tavares and Coelho-Filho, 2010

Brandão, Marianna, Coelho-Filho, Petronio Alves & Tavares, Marcos, 2012, A review of the genus Speocarcinus Stimpson, 1859 (Crustacea: Brachyura: Xanthidae), with a key to its species and the description of one new species, Zootaxa 3327, pp. 1-19 : 2-6

Speocarcinus amazonicus Brandão, Tavares and Coelho-Filho, 2010

( Figs. 2A , E; 3A; 4C; 5A; 6A; 7A–B; 8A)

Speocarcinus amazonicus Brandão, Tavares and Coelho-Filho, 2010: 138 .

Material examined. Holotype, male cl 8 mm, cw 11 mm ( MZUSP 23654), Pará, Amazon River, R/V Almirante Saldanha, st. 1993 II, 02°10’N – 48°07’W, 23.xi.1968, mud bottom, 49 m. Martinique, IGMAR 2, st. BI –197, 14 °49.661’N– 060°59.830’W, fluid mud: 1 female paratype ( MZUSP 17333). Brazil, Amapá, Caciporé Cape, R/V Calypso , st. 1787, 60 m: 1 female paratype ( MZUSP 8527). Caciporé Cape, R/V Almirante Saldanha, st. 1793 BII, 04°13’5’’S – 050°26’0’’W, 18.xi.1967, sand-muddy bottom, 75 m: 1 male and 1 female paratypes (DOUFPE 6101), 1 male and 2 females paratypes ( MZUSP 23655), st. 1787 A, 03°31.5’S – 50°11’W, 17.xi.1967, mud bottom, 75 m: 2 males paratypes (DOUFPE 6104). Pará, Amazon River, st. 1993 II, 02°10’N – 48°07’W, 23.xi.1968, mud bottom, 49 m: 1 male paratype (DOUFPE 6107). São Francisco River mouth, F/V Akaroa , st. 175, 10 °40’06”S– 36°23’35”W, 3.xii. 1965, 50 m: 1 female paratype (DOUFPE 6106), st. 170, 10 °33’42’’S– 36°16’30’’W, 3.xii.1965, mud bottom, 50 m: 1 male paratype ( MZUSP 23686), st. 181, 10 °38’09’’S– 36°16’00’’W, 4.xii.1965, sand-muddy bottom, 130 m: 1 male and 1 female paratypes (DOUFPE 6109). Sergipe, São Francisco River mouth, st. 177, 10 °37’56’’S– 36°19’30’’W, 4.xii.1965, mud bottom, 108 m: 1 male (DOUFPE 6111). Rio de Janeiro, Casimiro de Abreu, 22°38'22.1''S – 41°54'10.3''W, 1.iii.2008: 14 males and 29 females paratypes ( MZUSP 18478), 1 male and 1 female paratypes (DOUFPE), and 1 male and 1 female paratypes ( MNHN –B 32601). Rio de Janeiro, Ilha Grande, st. 23, 9.vii. 1966, 23 m: 1 female paratype ( MZUSP 3458). Ilha Grande, st. 30F, 1.vi.1967, 19.5 m: 1 female paratype ( MZUSP 9032). Santa Catarina, Porto Belo, shrimp trawler boat coll., 12.iii. 2010, 30 m: 1 male and 1 female paratypes ( MZUSP 22789). Rio Grande do Sul, R/V Prof. W. Besnard, st. 413, 33 °37'S– 51°41' W, 3.x. 1968, 78 m: 5 males ( MZUSP 9027). Rio Grande do Sul, Torres, st. 2234, 30 °37’ S– 49°59.6’W, 18.x.1969, sand-muddy bottom, 71 m: 1 male ( MZUSP 23656) and 1 male paratype (DOUFPE 6112).

Type locality. Pará, delta of the Amazon River (02°10’N – 48°07’W), 49 m.

Description. See Brandão et al. (2010).

Remarks. Contrary to Brandão et al. (2010) the carapace branchiostegal regions of S. amazonicus and S. lobatus have only one transversal row of distinct granules. The second row mentioned by Brandão et al. (2010) is actually considered herein to be part of the branchiostegal margin.

Distribution. Presently known from Martinique and Brazil (Amapá, Pará, Alagoas, Sergipe, Rio de Janeiro, Santa Catarina, and Rio Grande do Sul) on sand-muddy bottoms, between 23 and 130 m.

Figures

FIGURE 2. A – B, Lateral view of right and left chelipeds, respectively. C – H, Habitus, dorsal view. A, C, Speocarcinus amazonicus Brandão, Tavares & Coelho-Filho, 2010, holotype male cl 8 mm, cw 11 mm (MZUSP 23654). B, D, Speocarcinus granulimanus Rathbun, 1894, lectotype male cl 17.5 mm, cw 21 mm (USNM 17461). E, Speocarcinus lobatus Guinot, 1969, holotype male cl 16 mm, cw 12 mm (USNM 101081). F, Speocarcinus meloi D’Incao & Silva, 1991, holotype male cl 12 mm, cw 15.6 mm (MZUSP 9577). G, Speocarcinus monotuberculatus Felder & Rabalais, 1986, holotype female cl 6 mm, cw 7.8 mm (USNM 228459). H, Speocarcinus spinicarpus Guinot, 1969, male holotype cl 16 mm, cw 19 mm (USNM 231701). Note the differences in the chelipeds inner carpal spines. Scale bars: C – F, H, 10 mm; G, 2.5 mm.