Microphoxus Barnard, 1960

Andrade, Luiz F. & Senna, André R., 2020, New and additional records of Metharpinia Schellenberg, 1931 and Microphoxus Barnard, 1960 (Crustacea: Amphipoda: Phoxocephalidae) from Brazilian waters, Papéis Avulsos de Zoologia 60, pp. 1-37 : 22

Genus Microphoxus Barnard, 1960

Type species: Microphoxus minimus Barnard, 1960

Diagnosis (emended from Barnard, 1980; Alonso de Pina, 2003b): Eyes present. Antennae 1‑2, flagella unreduced in female. Antenna 1, article 2 ordinary, ventral setae widely spread. Antenna 2, article 1 not ensiform, article 4 in 1 or more rows; article 5 ordinary in size. Right mandibular incisor with 3 teeth, molar not triturative, small, pillow‑shaped, bearing 3 or more splayed stout setae, not bearing fuzz, palpar hump small. Maxilla 1, palp 2‑articulate, inner plate with 1‑4 setae. Maxilliped, inner plate ordinary, apex of palp article 3 not protuberant, article 4 elongate,apical nail distinct,articulate,medium to elongate. Gnathopods 1‑2 ordinary, small, similar, carpus free, elongate, palms almost to totally transverse, propodus ovatorectangular. Pereopods 3‑4, propodus with thin facial setae. Pereopod 5, ischium broad. Pereopod 7, basis naked ventrally, ischium and dactylus ordinary. Epimeral plates 1‑2 lacking or bearing numerous long posterior setae. Epimeral plate 3 ordinary. Urosomite 1 generally naked except for ventral bundle of for sparse apicoventral setae near base of uropod 1. Urosomite 3 with dorsal hook or special process. Uropods 1‑2, no rami with stout setae continuously to apex. Inner ramus of uropod 2 ordinary. Uropod 3, outer ramus 2‑articulate, article 2 elongate, with 2 apical setae.

Composition of the genus: The genus is composed by 5 species: Microphoxus breviramus Bustamante, 2002 ; Mi. cornutus ( Schellenberg, 1931) ; Mi. minimus Barnard, 1960 ; Mi. moraesi Bustamante, 2002 ; Mi. uroserratus Bustamante, 2002 .