Pontonia mexicana Guérin-Méneville, 1855

(Fig. 69, video 16)

Pontonia grayi Rathbun, 1901: 122; Schmitt 1924: 72 (Curaçao).

Pontonia mexicana — Holthuis 1951b: 130 (Bonaire, Curaçao); Fransen 2002: 132 (Bonaire, Curaçao).

Material examined. Curaçao: RMNH. CRUS.D.58265: 2 specimens; stn COA. 18, Playa Forti, 12°21′58.10″N 69°09′13.50″W, 01.xi.2013, depth 15 m, scuba diving, in Pinna carnea Gmelin, 1791 (photo B. T. Reijnen 015), collected by C.H.J.M. Fransen (photo B. T. Reijnen, 007, 009–014) . RMNH. CRUS.D.58266: 1 male, pocl. 4.5 mm; stn CF19A-3, Tugboat, 19.vi.2017, depth 5 m, scuba diving, in Pinna sp., collected by C.H.J.M. Fransen (video 16) .

Ecology. Symbiont of large bivalve mollusk species: P. carnea; P. rigida (Lightfoot, 1786); and Atrina seminuda (Lamarck, 1819) (Fransen 2002, De Grave & Anker 2017).

Distribution. Known from the tropical and subtropical western Atlantic from Florida south to the Brazilian Island Trinidade in depths between 0 and 10 m (Fransen 2002, De Grave & Anker 2017).