Debroyerella solidus (Andres 1986) Andres 1986
- Dataset
- Debroyerella gen. nov. and Ulladulla gen. nov., two new lysianassoid genera (Crustacea, Amphipoda, Lysianassoidea)
- Rank
- SPECIES
Classification
- kingdom
- Animalia
- phylum
- Arthropoda
- class
- Malacostraca
- order
- Amphipoda
- family
- Uristidae
- genus
- Debroyerella
- species
- Debroyerella solidus
description
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.
discussion
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
Distribution. Antarctica. Scotia-Faunengebiet and Weddell Sea (Andres 1986).
materials_examined
Type locality. Weddell Sea, Antarctica (77 ° 36.0 ' S 18 ° 39.3 ' W).