Heterophoxus Shoemaker, 1925

Andrade, Luiz F. & Senna, André R., 2020, A novel species of Heterophoxus Shoemaker, 1925 (Crustacea, Amphipoda, Phoxocephalidae) from southeast and southern Brazil, with an identification key to world species of the genus, European Journal of Taxonomy 592, pp. 1-16 : 2-3

Genus Heterophoxus Shoemaker, 1925

Type species

Heterophoxus pennatus Shoemaker, 1925

Diagnosis (modified from Barnard & Karaman 1991)

Rostrum unconstricted. Eyes present. Antenna 1, article 2 short, ventral setae widely spread, but almost confined apically. Antenna 2, article 1 strongly ensiform, facial stout setae on article 4 in one main row, article 5 very short. Mandible, right incisor with 4+ teeth, right lacinia mobilis bifid, flabellate, molar not triturative, with three basally fused stout setae; palpar hump medium, apex of palp article 3 oblique. Maxilla 1, inner plate, with two setae, palp 2-articulate. Maxilliped, inner plate, partly fused, poorly armed, apex of palp article 3 not strongly protuberant, article 4 not elongate, but apical nail distinct. Gnathopods small, similar, carpus of gnathopods 1–2 very short, without eusirid attachment, almost cryptic, propodus of gnathopods 1–2 ovatorectangular, elongate, poorly setose anteriorly, palms acute. Perepods 3–4, carpus with posteroproximal setae, propodus with thin armaments. Pereopod 5, basis, merus and carpus narrow. Pereopod 6, merus and carpus narrow. Pereopod 7 of ordinary size, ischium enlarged, dactylus ordinary. Epimeral plates 1–2 without long midfacial brushes or posterior setae. Epimeral plate 3 ordinary, bearing three or more long setae. Urosomite 3 without dorsal hook. Uropod 1, peduncle without inter-ramal spike, without displaced stout setae. Uropod 2, inner ramus ordinary. Uropod 3 ordinary, one of rami longer than peduncle, bearing article 2 on outer ramus, with two apical setae. Telson ordinary or with supernumerary lateral stout setae.

Composition

The genus is composed of 10 known species + 1 new species: Heterophoxus cephalodens Griffiths, 1975 ; H. despard Alonso, 2012 ; H. ellisi Jarret & Bousfield, 1994 ; H. oculatus (Holmes, 1908) ; H. ophthalmicus (Schellenberg, 1925) ; H. opus Griffiths, 1975 ; H. pellusidus Ren in Ren & Huang, 1991 ; H. pennatus Shoemaker, 1925 ; H. shoemakeri sp. nov.; H. trichosus K.H. Barnard, 1932 and H. videns K.H. Barnard, 1930 .