Foxiphalus Barnard, 1979

Andrade, Luiz F., Senna, André R. & Souza-Filho, Jesser F., 2022, First record and a new species of Foxiphalus Barnard, 1979 (Crustacea: Amphipoda: Phoxocephalidae) from the Atlantic Ocean, with two new records of the family from northeastern Brazil, Papéis Avulsos de Zoologia (Pap. Avulsos Zool., S. Paulo) 62, pp. 1-13 : 2-3

Genus Foxiphalus Barnard, 1979

Type species: Foxiphalus obtusidens (Alderman, 1936)

Diagnosis: After Jarret & Bousfield (1994), amendments in bold. Pigmented eyes very small to medium in female, medium to large in male. Rostrum fully hooded, unconstricted. Antenna 1, peduncle article 2 shorter than 1. Antenna 2, peduncle article 1 and 2 variously ensiform, article 3 with one lateral seta, article 4 facial robust setae in three distinct rows, anterior margin with few setae only, or also with robust seta, article 5 with one or two clusters of facial setae and one or two distal calceoli on the anterior margin in male; flagellum medium in the male and elongated with alternately calceolate articles in the male. Mandible incisors broad with at least two teeth, left lacinia mobilis with at least two teeth, right lacinia mobilis simple, bifid or absent, molar with five to 10 robust setae,accessory setal row medium to strong; palp slender, article 2 weakly setose, article 3 apex oblique and truncate, bearing cluster of setae. Upper lip epistome occasionally with sharp anterior process. Lower lip broad, with distinct shoulder cusps. Maxilla 1 inner plate with up to five apical setae, outer plate with one apical robust seta enlarged. Maxilla 2 outer plate usually broader than inner. Maxilliped inner plate with one or two apical robust setae; outer plate slender, short, not reaching half of palp article 2, dactylus slender. Gnathopods 1-2 dissimilar, propodus longer than respective carpus; palms acute. Gnathopod 2 carpus posterior margin short. Pereopods 3-4 carpus posterior margin with distal long robust seta, propodus with robust setae distally. Pereopod 5 basis broad, propodus longer than carpus, posterior margin setose, dactylus slender. Pereopod 6 basis broad, merus usually narrow and without facial rows of robust setae. Pereopod 7 copulatory spines in males slender, subequal, straight or slightly curved, proximally serrated, distally setulose or smooth. Uropod 1 peduncle with displaced robust seta present, rami with few dorsal robust setae, bearing apical nail. Uropod 2 peduncle with dorsal row of robust setae, outer ramus with few dorsal robust setae, inner ramus with robust seta or naked. Uropod 3 inner ramus of variable length in females, subequal and setose with plumose setae in males.Telson lobes with at least one apical robust seta on each side and single plumose seta.

Genus composition: The genus is composed of 11 species + 1 new species: Foxiphalus aleuti Barnard & Barnard, 1982 ; F. apache Barnard & Barnard, 1982 ; F. cognatus (Barnard, 1960) ; F. falciformis Jarret & Bousfield, 1994 ; F. fucaximeus Jarret & Bousfield, 1994 ; F.golfensis Barnard & Barnard, 1982 ; F. obtusidens (Alderman, 1936) ; F. potiguara sp. nov.; F.secasius Barnard & Barnard, 1982 ; F.similis (Barnard, 1960) ; F. slatteryi Jarret & Bousfield, 1994 ; and F.xiximeus Barnard & Barnard, 1982 .