Pontonia manningi Fransen, 2000

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 : 165

Pontonia manningi Fransen, 2000

( Figure 3E )

Material examined: Brazil: Trindade Island , Ilha da Racha, 20°30’26.5”S / 29°20’48.0”W, depth: 21.4 m, J.B. Mendonça coll., 01.vii.2016: 1 male, cl 5.7 mm associated with Pina sp. ( MZUSP 35286 ). Trindade Island, Enseada do Príncipe, Pedra da Garoupa , 20°31’35.5”S /29°18’94.0”W, depth: 10.4 m, J.B. Mendonça coll., 16.vii.2013: 1 male, cl 6 mm, 1 ovigerous female, cl 6 mm, associated with the bivalve Spondylus americanus ( MZUSP 31210 ) .

Comparative material examined: Brazil: Maranhão, RV “Almirante Saldanha”, Stn 1751, 00°37’S / 44°40’W, calcareous algae-sandy bottom, depth: 44 m, 06.xi.1967: 1 male, cl 5.7 mm ( MZUSP 8945 ) .

Type locality: 25 miles North of Isla Margarita, Venezuela.

Distribution: Amphi-Atlantic. Western Atlantic: North Carolina to Caribbean Sea, Gulf of Mexico, Venezuela (Margarita Island) and Brazil (Maranhão, Banco Vitória, Espírito Santo and Trindade Island, present study). Eastern Atlantic: Canary Islands and Cape Verde Islands ( Fransen, 2000, 2002; Wirtz & d’Udekem d’Acoz, 2001; Cardoso, 2006; Vieira et al., 2012).

Ecological notes: Pontonia manningi lives in association with the bivalves Aequipecten gibbus, Chlamys mildredae, Spondylus americanus , S. gaederopus , S. senegalensis, Pecten gibbosus and Pteria colymbus , sometimes in pairs, between 3 and 80 m ( Fransen, 2000, 2002; Fransen & Reijnen, 2013; Wirtz & d’Udekem d’Acoz, 2001). In Florida male-female pairs of P. manningi were found inside Pteria colymbus , some of which brooding embryos. No hosts were colonized by two male or two female. Evidence exists that P. manningi is primarily socially monogamous ( Baeza et al., 2016). In Trindade Island a male and an ovigerous female were encountered living inside Spondylus americanus (fig. 3F); the male was distinctly smaller than the female.

Remarks: The present material is the first record of P. manningi from Trindade, all other Brazilian records being on the continental coast and rather scarce. In

the eastern Atlantic P. manningi is presently known only from oceanic archipelagos.

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.