Gnathophyllum circellum Manning, 1963

Tavares, Marcos Domingos Siqueira, Carvalho, Leina & Mendonça Jr., Joel Braga de, 2017, Towards a review of the decapod crustacea from the remote oceanic archipelago of Trindade and Martin Vaz, south Atlantic Ocean: new records and notes on ecology and zoogeography, Papéis Avulsos de Zoologia (São Paulo) 57 (14), pp. 157-176 : 164

Gnathophyllum circellum Manning, 1963

( Figure 3 C-D)

Materialexamined: Brazil: TrindadeIsland , EnseadaOrelhas (Canto Esquerdo), 20°29’40.2”S / 29°20’32.9”W, depth: 10.8 m, J.B. Mendonça coll., 21.v.2014: 1 male ( MZUSP 33411 ) . Trindade Island , Ponta da Calheta, 20°30’18.7”S / 29°18’31.6”W, depth: 15.6 m, J.B. Mendonça coll., 30.iv.2014: 1 male ( MZUSP 33412 ) . Ibidem , depth: 16.3 m, J.B. Mendonça coll., 09.vii.2015: 1 male ( MZUSP 33433 ) . Trindade Island , Praia da Calheta, 20°30’29.5”S / 29°18’37.0”W, depth: 15 m, J.B. Mendonça coll., 22.vi.2015: 1 male ( MZUSP 33430 ) . Trindade Island , Ilha Sul (Enseada da Praia do Príncipe), 20°31’34.3”S / 29°19’27.8”W, depth: 17.8 m, J.B. Mendonça coll., 21.x.2014: 1 male ( MZUSP 33413 ). Size of largest male: cl 6.5 mm ( MZUSP 33430 ).

Type locality: Southwest of Alligator Reef Light , Monroe County, Florida, USA .

Distribution: Western Atlantic: Bahamas (Great Exuma), Florida, Bonaire ( Manning, 1963; Chace, 1972; Abele & Kim, 1986; Camp et al., 1998; RCS, 2009) and Brazil (Trindade Island, present study).

Ecological notes: Gnathophyllum circellum has been found in rock ledges, reefs and coral heads ( Manning, 1963). In Trindade single individuals were found un- der stones, between 10 and 18 m.

Remarks: The material from Trindade represents the first record of G. circellum from the south Atlantic Ocean and the southern-most record of the species. It seems likely that G. circellum will also be recorded from the continental Brazilian shores when surveys of appropriate biotopes are carried out.

Figures

FIGURE 3: A-B, Gnathophyllum americanum Guérin-Méneville, 1855. A, Ovigerous female, cl 4.5 mm, lateral view (MZUSP 33418). B, Male, cl 3.5 mm, dorsal view (MZUSP 33419). C-D, Gnathophyllum circellum Manning, 1963, male, cl 4.2 mm, lateral and dorsal views, respectively (MZUSP 33411). E, Pontonia manningi Fransen, 2000, male, cl 5.7 mm (MZUSP 35286). F, Trindade Island, Farol, Enseada dos Portugueses, 10 m. Pina sp., bivalve usually hosting P. manningi. Scales: A-B, 4.5 mm. C-D, 4 mm. E, 5.5 mm. Photographs by JBM.