Achelous anceps ( de Saussure, 1857 )

Parasram, Nadeshinie, Santana, William & Vallès, Henri, 2023, Checklist of the shallow-water marine Brachyura (Crustacea: Decapoda) of Barbados, West Indies, Zootaxa 5314 (1), pp. 1-62 : 32

Achelous anceps ( de Saussure, 1857)

( Fig. 16A )

Lupea anceps de Saussure, 1857: 434 , pl. 2, fig. 11–11b [type-locality: Cuba; type not found].

Lupea duchassagni Desbonne in Desbonne & Schramm, 1867: 39.

Portunus (Portunus) anceps .— Rathbun, 1930: 42, pl. 15; Ng et al. 2008: 152.

Portunus anceps .— Williams 1965: 163, fig. 145; Coelho & Ramos 1972: 186; Powers 1977: 82; Williams 1984: 387, fig. 302; Abele & Kim 1986: 53; Manning & Chace 1990: 52, fig. 34; Melo 1996: 349, unnumbered fig.; Bertini et al. 2004: 2198; Mantelatto et al. 2009: 557, tab. 1; Rodrigues et al. 2016: 7, fig. 4A; Poupin 2018: 208; Mantelatto et al. 2020: 67; Tavares & Mendonça 2022: 56.

Achelous anceps . — Koch et al. 2022: 11.

Distribution. Western Atlantic: USA (North Carolina, Florida), Bermuda, Gulf of Mexico, St. Thomas, St. Martin, Saba, St. Eustatius, Antigua, Guadeloupe, Martinique, Barbados, Curaçao, Brazil, Trinidade, and Martin Vaz ( Rathbun 1930; Rodrigues et al. 2016; Poupin 2018; Tavares & Mendonça 2022; present study).

Material examined. Barbados, Port St. Charles , St. Peter, subtidal, 13°15’51.81”N, 59°38’36.34”W, 4 Ô, 1 ♀ CW: 22.2, 26.1, 29.9, 31.7, 29.7 mm ( BLSZ 038 ). Idem, 1 Ô CW: 30.5 mm ( BLSZ 271 ) .

Remarks. This is the first record of Portunus anceps for Barbados. Caught in crab traps placed on sandy bottom (~ 4m deep) on the west coast of Barbados. Poupin (2018: 208) referencing Rathbun (1921: 67) included Barbados in the distribution for this species. However, Rathbun 1921: 67) reported Portunus (Portunus) sulcatus (two juvenile males, USNM 58046, 76738), which were collected from tidal pools at Pelican Island and Bathsheba in Barbados. However, Portunus (Portunus) sulcatus is a synonym of Portunus ventralis (A. Milne-Edwards, 1879) not Portunus anceps ( de Saussure, 1857) . Portunus anceps can be identified by its four triangular and blunt teeth on the frontal margin, median pair smaller than lateral pair, which are more advanced than the outer and inner supraorbital teeth ( Rathbun 1930).

Figures

FIGURE 16. Superfamily Portunoidea Rafinesque, 1815, dorsal habitus: A, Achelous anceps (de Saussure, 1857), male, cw 30.5 mm (BLSZ 271); B, Achelous sebae (H. Milne Edwards, 1834), female, cw 56.6 mm (BLSZ 245); C, Achelous ventralis (A. Milne-Edwards, 1879), male, cw 29.1 mm (BLSZ 185); D, Callinectes marginatus (A. Milne-Edwards, 1861), female, cw 81.8 mm (BLSZ 057); E, juvenile specimen of Callinectes marginatus, cw 20.0 mm (BLSZ 230). Scale bars: 20 mm.