120 

Fig. 16 Phippsia gibbosa, immature female, Bioice st.570. 
on distal anterior and posterior margins; ischium with plumose setae 
on posterior distal margin. 
Pereopod 6 elongate, basis posteriorly expanded, expansion rudi- 
mentary, without a row of long plumose setae; carpus and propodus 
anteriorly concave. 
Pereopod 7 basis anterior margin straight, distally rounded, with 
a medial row of long setae. 
Oostegites on pereopods 2-5. 
Pleonites 1—3 dorsally smooth. 
Urosome: articulation between urosome segments 2 and 3 absent. 
Uropod | peduncle shorter than rami, outer ramus longer than inner. 
Uropod 2 peduncle shorter than rami, outer ramus longer than inner. 
Uropod 3 peduncle shorter than half the length of rami, outer ramus 
|-articulate, outer ramus longer than inner. 
Telson as long as broad, as long as peduncle uropod 3, cleft, 
apically rounded, no submarginal setae on apex of each lobe. 
MALE. Pereopod 2 and urosome ordinary (similar to females). 
REMARKS. The present species is distinguishable from all other 
stegocephalid species by its elongate pereopod 6, reduced outer 
plate of maxilla 2 and the triangular shape of the mandibular incisor. 
In addition to this, its long and round coxae 1-4 give the anterior part 
of the body a conspicuously globular shape. 
Phippsia Stebbing, 1906 
Aspidopleurus Sars, 1895: 203 (homonym, Pisces) 
Phippsia Stebbing, 1906: 89 (replacement name) 
J. BERGE, W. VADER AND A. GALAN 
Phippsia gibbosa (Sars, 1883) 
(Figs 16-19) 
Stegocephalus gibbosa Sars 1883 
Aspidopleurus gibbosa Sars 1895 
MATERIAL EXAMINED. Description based upon immature female, 
Bioice st. 570 (see Berge & Vader 1997d), checked with type (see 
Remarks). 
DISTRIBUTION. North Atlantic. 
DESCRIPTION. Biology: not pelagic, has been found on living 
Lophelia sp. (see Sars 1895 and W.Vader pers. com.). 
Rostrum very small. 
Antennae short. Antenna | longer than antenna 2; flagellum 6- 
articulate; accessory flagellum article 2 absent. Antenna 2 peduncle 
(articles 3-5) longer than flagellum; article 3 short, about as long as 
broad; article 4 shorter than article 5. 
Epistome curved (convex) and smooth; epistomal plate (medial 
keel) produced into a large conspicuous medial keel. 
Mouthparts not elongate or pointed. 
Mandible incisor lateral; incisor toothed; left lacinia mobilis 
present, powerful, laterally expanded, not conical. 
Maxilla | palp 2-articulate, rectangular, apex not reaching beyond 
outer plate; outer plate distally rectangular; ST in a pseudocrown 
(see below), ST first row with 6 setae (ST1—5, ST7), ST 1 conspicu- 
ously enlarged, gap between ST 5 and ST 7 absent; ST A and B 
present, located distally, part of firstrow, ST C present, ST D absent; 
inner plate with a well developed shoulder, setae pappopectinate. 
Maxilla 2 gaping and geniculate, outer plate setae with distal 
hooks present, distal cleft present; inner plate setae row A covering 
MX2 O.P. 

A2 
Fig. 17 Phippsia gibbosa, immature female, Bioice st.570. 
