Leptophoxoides molaris J. L. Barnard 1962

“Leptophoxoides molaris, new species

Diagnosis: With the characters of the genus.

Descriptive features differentiating this species from Leptophoxus falcatus: the lower posterior corner of the third pleonal epimeron is rounded, the lower edge quite convex; inner ramus of uropod 3 is nearly as long as article 1 of outer ramus.

Holotype: L.G.O. No. 41, female, 3 mm., unique.

Type locality: Vema Station 52, Cape Basin, 4961 meters. Benthic.”

(Barnard, 1962: 51)

Leptophoxoides molaris J. L. Barnard

Leptophoxoides molaris J. L. Barnard, 1962:51, fig. 40.

DISTRIBUTION.—Cape Basin, off South Africa, 4961 m.

Leptophoxus Sars

Leptophoxus Sars, 1895:146.

DIAGNOSIS.—Eyes absent. Flagella of antennae 1–2 reduced in female. Article 2 of antenna 1 especially shortened, ventral setae confined apically. Article 1 of antenna 2 not ensiform; [?article 3 with 2 setules]; facial spines on article 4 in 2 rows; article 5 ordinary in size. Right mandibular incisor with 3 teeth; molar not triturative, small, pillow-shaped, bearing semiarticulate spines, [?usually not bearing fuzz]; palpar hump medium. Palp of maxilla 1 uniarticulate; inner plate naked. Setation of maxilla 2 weak. Inner plate of maxillipeds ordinary, apex of palp article 3 strongly protuberant, dactyl elongate, apical nail distinct, short. Gnathopods dissimilar, gnathopod 2 strongly enlarged; article 5 of gnathopods 1–2 very short, cryptic on gnathopod 2, with eusirid attachment, palms oblique, hand of gnathopod 2 broadened, both hands poorly setose anteriorly. Article 5 of pereopods 1–2 setose posteroproximally. Article 2 of pereopod 3 of broad form, articles 4–5 of pereopods 3–4 narrow, article 2 of pereopods 3–4 not setose posteriorly; pereopod 5 ordinary, article 2 naked ventrally, article 3 ordinary, dactyl normal. Epimera 1–2 lacking long posterior setae, without midfacial setae above ventral facial ridge; epimeron 3 of rounded classification and lacking long setae. Urosomite 1 generally naked; urosomite 3 without dorsal hook or special process. Peduncle of uropod 1 normally elongate, without apicoventral spike, without special enlarged apicolateral–medial spine; [?peduncular apices of uropods 1–2 not combed]; inner ramus of uropod 1 with marginal spines in one row, no rami continuously spinose to apex, inner ramus of uropod 2 ordinary. Uropod 3 ordinary, elongate article 2 of outer ramus carrying 2 short apical setae. Telson elongate, with only 2 apical spines or setae on each lobe plus setules, without special dorsal and lateral spines or setae.

DESCRIPTION.—Rostrum fully developed. Fuzz present on article 1 of primary flagellum on male antenna 1; [fuzz on article 1 of antenna 1 in male unknown; calceoli on male primary flagellum of antenna 1 unknown]. Calceoli on article 5 of male antenna 2 present; flagellum in male with calceoli. Prebuccal parts ordinary, poorly separated from each other, upper lip dominant. Right lacinia mobilis bifid, thin, article 1 of mandibular palp medium to thick, article 1 short, article 2 without outer setae, apex of article 3 oblique. Lower lip lacking cones. Outer plate of maxilla 1 with 7 spines, no spine especially thickened. Inner plates of maxilliped especially thin, poorly armed. Coxae 2–4 without special anterodorsal humps. All posterior spines on article 6 of pereopods 1–2 thin and seta-like, [?midapical spine or seta present]. Article 2 of pereopod 5 without facial setae. Peduncle of uropod 1 with dorsolateral spines widely spread, [?medial spines confined apically, ?peduncle of uropod 2 with only one medial spine or setule confined apically]. Peduncle of uropod 3 lacking extra subapical setae or spines. [?Telson with ordinary pair of midlateral or dorsal setules on each side.]

TYPE-SPECIES.—Phoxus falcatus Sars, 1883 (monotypy). Monotypic, with 2 subspecies.