Key to species of the genus Boca 1a. Antenna 1, primary flagellum 4-articulate; mandible, incisor smooth or minutely serrate, with 1 anterior stout spine; uropod 3, inner ramus longer than outer ramus article 1.............................................................. 2 1b. Antenna 1, primary flagellum 3-articulate; mandible, incisor with 4 spines surrounding 1 stout and central spine; uropod 3, inner ramus subequal in length to outer ramus article 1............................................. Boca normae 2a. Epistome and upper lip fused, with central notch; antenna 1, accessory flagellum reaching the primary flagellum article 2 or shorter; mandible, palp article 3 suboval, inner margin naked, distally straight to slightly falcate; uropod 3, inner ramus reaching about the half of the outer ramus article 2................................................................ 3 2b. Epistome and upper lip fused, without central notch; antenna1, accessory flagellum reaching the primary flagellum article 3; mandible, palp article 3 falciform, inner margin minutely setose, concave; uropod 3, inner ramus reaching about the apex of the outer ramus article 2.................................................................... Boca gurui sp. nov. 3a. Gnathopod 1, dactylus curved; telson without apical robust setae................................................ 4 3b. Gnathopod 1, dactylus bent at right angle proximally; telson with 1 apical robust seta on each lobe............. Boca elvae 4a. Gnathopod 1 weakly subchelate, dactylus large; pereopods 5–7, propodus with articulated anterodistal spur.... Boca campi 4b. Gnathopod l massively subchelate, dactylus very large; pereopods 5–7, propodus with non articulated anterodistal spur.............................................................................................. Boca megachela

Published as part of Senna, André R., Sorrentino, Rayane, Chatterjee, Tapas & Schizas, Nikolaos V., 2014, A new species of Boca Lowry & Stoddart, 1997 (Amphipoda: Lysianassoidea: Aristiidae) from a mesophotic coral ecosystem off Puerto Rico, Caribbean Sea, pp. 429-436 in Zootaxa 3884 (5) on pages 434-435, DOI: 10.11646/zootaxa.3884.5.3, http://zenodo.org/record/231544