Synalpheus antillensis Coutière, 1909

Anker, Arthur, Tavares, Marcos & Mendonça, Joel B., 2016, Alpheid shrimps (Decapoda: Caridea) of the Trindade & Martin Vaz Archipelago, off Brazil, with new records, description of a new species of Synalpheus and remarks on zoogeographical patterns in the oceanic islands of the tropical southern Atlantic, Zootaxa 4138 (1), pp. 1-58 : 36-37

Synalpheus antillensis Coutière, 1909

( Fig. 11 F)

Synalpheus minus form antillensis Coutière 1909: 46 , fig. 27.

Synalpheus minus antillensis — Chace 1956: 148.

Synalpheus antillensis —Anker et al. 2012: 16, figs. 9, 10a-c; Soledade et al. 2015: 61. Synalpheus minus — Chace 1972: 95 (partim?); Christoffersen 1979: 350 (partim), fig. 28 [not S. minus (Say, 1818) ]. Synalpheus brevicarpus species complex—Santos et al. 2012: 153, fig. 4D [not S. brevicarpus (Herrick, 1891) ].

Material examined. Brazil: 1 ovig. female, MZUSP 33393, Trindade Island, Enseada Orelhas, 20°29’40.2”S – 29°20’32.9”W, depth: 12 m, in sponge, coll. J.B. Mendonça, 01.xi.2014; 1 male, MZUSP 33286, Trindade Island, Enseada Orelhas, 20°29’40.2”S – 29°20’32.9”W, depth: 10.4 m, coll. J.B. Mendonça, 16.v.2014; 1 ovig. female, MZUSP 33292, same collection data; 3 (1 ovig.) females, MZUSP 30237, Trindade Island, Enseada Orelhas, 20°29’40.2”S – 29°20’32.9”W, depth: 14.4 m, coll. J.B. Mendonça, 30.vi.2012; 1 female, MZUSP 30286, Trindade Island, large underwater boulder near Ponta Noroeste, 20°29’46.4”S – 29°30’35.4”W, depth: 11.6 m, coll. J.B. Mendonça, 04.vii.2012; 4 (1 ovig.) females, MZUSP 30322, Trindade Island, Enseada da Cachoeira, Farrilhões, 20°31’22.4”S – 29°19’52.0”W, depth: 11.8 m, coll. J.B. Mendonça, 20.vi.2012; 3 (1 ovig.) females, MZUSP 30245, Trindade Island, Enseada dos Portugueses, Praia da Calheta in front of SECON, 20°30’20.9”S – 29°18’43.7”W, depth: 12.3 m, coll. J.B. Mendonça, 03.vii.2012; 1 male, MZUSP 34122, Trindade Island, Enseada dos Portugueses, Praia da Calheta in front of SECON, 20°30’20.9”S – 29°18’43.7”W, depth: 11.6 m, coll. J.B. Mendonça, 09.vii.2015; 1 male, 1 ovig. female, MZUSP 33265, Trindade Island, Enseada dos Portugueses, Ponta da Calheta, 20°30’18.7”S – 29°18’31.6”W, depth: 16.3 m, coll. J.B. Mendonça, 20.v.2014; 1 male, 2 ovig. females, MZUSP 30045, Trindade Island, Ponta Norte, 20°29’18.7”S – 29°20’18.3”W, depth: 15.6 m, coll. J.B. Mendonça, 03.vii.2012; 1 female, MZUSP 30299, Trindade Island, Praia dos Portugueses, Rampa Nova, 20°30’17.7”S – 29°18’56.7”W, depth: 11 m, coll. J.B. Mendonça, 11.vii.2012; 1 male, 1 female, MZUSP 31015, Trindade Island, Parcel das Tartarugas, 20°31’11.4”S – 29°18’00.6”W, large tidal pool among rocks, depth: 2 m, coll. J.B. Mendonça, 15.vii.2012; 1 male, 1 ovig. female, MZUSP 33299, Trindade Island, Ponta do Monumento, 20°3010.3”S– 29°20’36.1”W, depth: 2 m, coll. J.B. Mendonça, 02.xi.2014. Size of largest male: cl 4.0 mm ( MZUSP 34122); largest female: cl 5.1 mm ( MZUSP 33393).

Description. See Coutière (1909) for a brief original account (as S. minus form antillensis ) accompanied by some figures, and Anker et al. (2012) for a full redescription with illustrations, including colour photographs (see also Fig. 11 F).

Distribution. Western Atlantic: Gulf of Mexico; Caribbean Sea; Brazil: Ceará to São Paulo, Abrolhos Islands, Atol das Rocas , Trindade Island (Anker et al. 2012 and references therein; Soledade et al. 2015; present study).

Ecology. Coral reefs with abundance of coral rubble and coralline algae; in crevices of algal clumps, dead corals, sponges etc.; intertidal to 42 m.

Remarks. Synalpheus antillensis is a fairly common western Atlantic species reported from several Brazilian localities, including Atol das Rocas (Anker et al. 2012) and the Abrolhos Archipelago (Soledade et al. 2015). It is reported herein for the first time from Trindade Island, representing the eastern-most record of the species, which can be easily recognised by the intense pink colour of the major chela (Anker et al. 2012: fig. 10a–c; see also Fig. 11 F).

Figures

FIGURE 11. Metalpheus rostratipes (Pocock, 1890): A, B — ovigerous female from Enseada dos Portugueses, Trindade Island, Brazil (MZUSP 33293), A — dorsal view; B — lateral view. Prionalpheus gomezi Martínez-Iglesias & Carvacho, 1991: C, D — ovigerous female missing both chelipeds from Enseada dos Portugueses, Trindade Island, Brazil (MZUSP 33360), C — dorsal view; D — lateral view. Salmoneus setosus Manning & Chace, 1990: E — ovigerous specimen from between Ponta da Crista do Galo and Ponta Norte, Trindade Island, Brazil (MZUSP 33391), lateral view. Synalpheus antillensis Coutière, 1909: F — male from Enseada Orelhas, Trindade Island, Brazil (MZUSP 33286), lateral view. Synalpheus fritzmuelleri Coutière, 1909: G, H — ovigerous female from Enseada dos Portugueses, Trindade Island, Brazil (MZUSP 33248), G — dorsal view; H — lateral view. Photographs by J. B. Mendonça.