Careproctus catherinae Andriashev & Stein 1998

Stein, David L., 2012, Snailfishes (Family Liparidae) of the Ross Sea, Antarctica, and Closely Adjacent Waters 3285, Zootaxa 3285, pp. 1-120 : 13-16

Careproctus catherinae Andriashev & Stein 1998

Figs. 4, 5

Careproctus catherinae Andriashev & Stein 1998:11 , Fig. 6; Andriashev 2003:44, Figs. 15, 16.

Holotype. LACM 11398–2 , male, 216 mm TL, 189 mm SL, 75°07' S, 175°51' W, USNS Eltanin, Stn. 1925, 27 Jan 1967, 1382– 1405 m.

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& view Andriashev. c ventral catherinae ; ZIN N 668 Careproctus girdle,. 4 pectoral

FIGURE b,

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Material examined. Holotype. Paratype, ZISP 50835 (formerly LACM 11399–4 ) , female, 192 mm TL, 176 mm SL, 74°53' S, 174°42' W, USNS Eltanin, Stn. 1926, 22 Jan 1967, 2148– 2154 m .

Expanded diagnosis. Counts. V 46–47 (11+35–36), D 43, A 34, C 14 (2+5/7), P 37–38 (28–29+9), radials 4 (3+1), gr 9, pc 12, pores 2–6–7–1. Ratios. HL 30.7–32.4, HW 24.6–26.0, sn 8.4–8.6, E 4.6–5.2, orbit 8.2–8.7, uj 14.4–15.4, go 11.2–11.6, md 11.5–11.8, disk 13.1, da 4.1–4.3, bd 26.2–29.4, preD ~31, preA 44.9–49.7, ma 26.7– 28.1, aAf 12.8–13.4, UPL 17.6–19.0, LPL 16.9–17.9. In % HL: HW 76.6–81.2, sn 25.7–28.1, E 15.2–15.9, orbit 27.0–27.2, io 37.9–38.5, go 34.5–37.9, disk 40.3–42.8, UPL 55.2–62.1, LPL 49.0–62.8.

Head large, its width slightly less than its depth. Dorsal contour of head evenly rounded to snout. Mouth large, terminal, horizontal, upper jaw extending to below middle or rear of eye. Teeth mostly simple, conical, recurved and sharp, innermost with small shoulders or lobes, forming wide bands. Symphyseal gaps absent. Disk large, flat, about 2/5 HL. Gill opening extending ventrally in front of 5–6 pectoral fin rays, gill flap small, near dorsal end of opening. Upper pectoral lobe not quite reaching anal fin origin; notch distinct but not deep, its ray spacing gradually increasing ventrally, rudimentary rays absent; lower lobe nearly as long as upper lobe, its ventralmost ray below anterior margin of eye. Radials R 1, R 2, R 3 deeply notched; scapular helve short and wide, coracoid helve long, narrow, basal notch absent. Two pair of well-developed pleural ribs. Preanal fin length a little less than half SL. Hypural plate divided, a distinct parhypural suture present. Pyloric caeca 12, in two groups of 7 and 5. In life, body pink to lavender; in alcohol, body, orobranchial cavity, peritoneum, and stomach pale.

Distribution. Known from the northern Ross Sea at 1382–2154 m.

Comparisons. Similar to C. smirnovi Andriashev 1991b from the Falkland Islands at 1500–1580 m, but differs distinctly in having a shorter gill opening (in front of 5–6 rays, 34–38% HL vs 14–17 rays, 47–50% HL), much larger disk (40–43 vs 30–33% HL), unpigmented peritoneum (vs pale brown) and other characters. Also similar to C. parini Andriashev & Prirodina 1990 from the South Shetland Islands at 750–860 m, but it differs in tooth shape (simple, conical, recurved vs trilobed), pectoral ray count (37–38 vs 33–35), shorter distance from disk to anus (~13 vs 25–32% HL), and peritoneum color (pale vs brown).

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inflexidens ventral c.; Careproctus, N ZIN 665. 6 girdle FIGURE pectoral