Fuegiphoxus Barnard and Barnard, 1980

Genus Fuegiphoxus Barnard and Barnard, 1980 View in CoL

Type species. Fuegiphoxus fuegiensis ( Schellenberg,

1931).

Amended diagnosis (after Chiesa and Alonso, 2011). Head with eyes present (absent in female F. abjectus ), rostrum non-constricted and well developed. Antenna 1 peduncle article 2 short, ventral setae moderately spread. Antenna 2 peduncle article 1 not ensiform; article 4 with facial stout setae in 3 or more rows, with some thick and thin setae; article 5 shorter and narrower than article 4. Mandible right incisor with 3 or 4 teeth; right lacinia mobilis bifid or multicuspidate; left lacinia mobilis with 4 teeth; molar not triturative, small, bearing 3 stout setae, being one of those longer and serrate; palpar hump small, article 1 short to elongate, article 2 without lateral setae, article 3 apex oblique. Maxilla 1 inner plate with 4 setae; palp 2-articulate. Maxilliped inner plate with 1 or 2 stout setae apically; palp article 3 apex not strongly protuberant, article 4 elongate, apical nail distinct, short to medium length.

Gnathopods medium, dissimilar, with gnathopod 2 weakly enlarged. Gnathopods 1–2 propodus ovato-rectangular and elongate, weakly setose anteriorly; palms acute. Gnathopod 2 carpus short to elongate (only in F. abjectus is elongate) and subcryptic to cryptic. Pereopods 3–4 carpus without posteroproximal seta; propodus with thick and thin armaments, mid-apical setae absent. Pereopod 5 basis broad. Pereopods 5–6 basis not setose posteriorly; merus and carpus narrow to medium. Pereopod 7 basis naked ventrally, without facial setae.

Epimeral plates 1–2 (not described for F. uncinatus ( Chevreux, 1912)) without long facial brushes or posterior setae. Epimeral plate 3 posteroventral corner rounded, subquadrate or with a hook,bearing 2 or more ventral setae. Urosomite 3 rounded posterodorsally. Uropod 1 peduncle elongate, without inter-ramal or major displaced stout seta, with dorsolateral setae confined apically or widely spread, medial setae widely spread. Uropod 2 peduncle strongly setose dorsally. Uropods 1–2 peduncle apico-lateral corners with faint comb (not described for F. uncinatus ); rami not continuously setose to apex, without subapical nails, bearing embedded apical nails. Uropod 3 rami longer than peduncle; outer ramus article 2 bearing 2 medium to long setae apically. Telson lobes with 2 or 3 setae apically plus setule.

Genus composition. The genus is composed of four species: Fuegiphoxus abjectus ; F. fuegiensis ; F. inutilus Barnard and Barnard, 1980 ; F. uncinatus .