Debroyerella solidus ( Andres, 1986 )

Lowry, J. K. & Kilgallen, N. M., 2015, Debroyerella gen. nov. and Ulladulla gen. nov., two new lysianassoid genera (Crustacea, Amphipoda, Lysianassoidea), Zootaxa 3920 (1), pp. 153-162 : 156

Debroyerella solidus ( Andres, 1986)

Cheirimedon similis .— Andres, 1983: 185.

Cheirimedon solidus Andres, 1986: 120 , figs 5, 6.— De Broyer & Jażdżewski, 1993: 66.— De Broyer et al., 2007: 138.

Types. Holotype, male, 11 mm, ZMH K 33164 .

Type locality. Weddell Sea, Antarctica (77°36.0'S 18°39.3'W).

Description. Head, lateral cephalic lobe rounded; eyes reniform. Antenna 1 peduncular article 1 without anterodistal lobe; accessory flagellum with an elongate article 1 (at least twice as long as article 2) partially covering callynophore, 4-articulate; primary flagellum with weak 1-field callynophore; calceoli absent. Antenna 2 peduncular article 3 short; articles 3 to 5 not enlarged, brush setae present; calceoli absent. Labrum (epistome and upper lip) separate; epistome produced equally with upper lip, straight; upper lip produced, rounded apically. Mandible molar an (?) asymmetrically reduced column, proximally setose, distally triturating; left lacinia mobilis a long, slender robust seta. Maxilla 1 outer plate setal-teeth in a well-developed 7/4 crown arrangement; palp distal margin with apical robust setae. Maxilla 2 inner plate significantly shorter than outer plate. Maxilliped outer plate with 2 long (one slender, one broad) apical robust setae.

Gnathopod 1 coxa large, about as long as coxa 2, subrectangular with slightly concave anterior margin, slightly expanded distally; basis sparsely setose along anterior margin; ischium short; propodus margins subparallel, palm transverse or slightly acute, entire, convex, minutely serrate; dactylus simple. Gnathopod 2 subchelate; propodus palm transverse, straight; dactylus fitting palm. Pereopod 4 coxa with a well-developed posteroventral lobe. Pereopod 5 coxa about as long as broad, producing slight posterior lobe; basis longer than broad, posterior margin weakly serrate; carpus 2 × longer than wide; propodus 3 × times longer than wide. Pereopod 6 carpus 2.5 × longer than wide; propodus 3 × times longer than wide. Pereopod 7 basis posterior margin evenly rounded, posterodistally produced less than halfway along merus; carpus 2.5 × longer than wide; propodus 3 × times longer than wide.

Epimeron 3 posterior margin smooth or minutely serrate, posteroventral corner subquadrate. Uropod 2 inner ramus without constriction. Uropod 3 inner ramus slightly shorter than outer ramus; outer ramus article 2 short, with plumose setae on both rami. Telson distinctly longer than broad (length 1.6 × width), cleft to 35% of length, with 1 apical robust seta on each lobe.

Depth range. 0–201 m in water depth of 1900 m.

Remarks. Most similar to D. fougneri , Debroyerella solidus differs from that species by the shorter and stouter carpus and propodus of pereopods 5–7.

Distribution. Antarctica. Scotia-Faunengebiet and Weddell Sea ( Andres 1986).