Linophryne parini Bertelsen, 1980

Ho, Hsuan-Ching, Kawai, Toshio & Amaoka, Kunio, 2016, Records of deep-sea anglerfishes (Lophiiformes: Ceratioidei) from Indonesia, with descriptions of three new species, Zootaxa 4121 (3), pp. 267-294 : 292-293

Linophryne parini Bertelsen, 1980

Fig. 22

Linophryne parini Bertelsen, 1980:234 , fig. 1 (type locality: East coast of South Africa, 33°41'06"S, 27°26'E, 0 to 1200–1220 meters, bottom trawl).

Material. HUMZ 194262 (1 female 66.4, 1 attached male 12.5), st. 31, 8°35.6'S, 110°43.3'E – 8°35.5'S, 110°41.8'E, off Java, 605–607 m, 14 May 2005.

Description. Dorsal-fin ray 3; pectoral-fin rays 15; anal-fin rays 3; caudal-fin rays 8. Vomerine teeth 2 (1, 1); upper jaw teeth 36 (18, 18); lower jaw teeth 29 (14, 15). Head length 46.7% SL; head depth 37.8; head width 29.5; total length of hyoid barbel 43.5; upper jaw length 37.8; lower jaw length 39.0; caudal-fin length 53.6.

Body slightly elongate, profile oval in lateral view, with narrow caudal peduncle. Sphenotic spine welldeveloped and directed upward and forward. Preopercular spine well developed. Symphysial spine reduced. Frontals with rounded, dorsally directed projection. Mouth large, gape slightly oblique.

Esca damaged. Hyoid barbel moderately long, with short undivided proximal stem, its length 12.1% of total hyoid barbel length or 5.3% SL; distal portion divided into median and two lateral main branches; median branch somewhat shorter, with 5 secondary branches; lateral branches bifurcated, divided into several smaller branches; each branch with varying number of filaments, each filament with distal photophore; single, short filamentous anterior branch at anterior bases of main branch.

Body uniformly blackish; hyoid barbel unpigmented except for base.

Attached male. Male individual attached posteriorly on right side of the female body. It is 12.5 mm SL (18.8% SL of host female) and 20 mm TL (9.9% of total length host female). Eyes and all head spines totally reduced. Rays of pectoral and caudal fins complete; those of dorsal and anal fins not detectable and possibly embedded.

Distribution. Previously only known from the western Indian Ocean off South Africa at depths of 1200–1220 m. New record in eastern Indian Ocean off Indonesia, at depths of 605– 607 m.

Remarks. Although the esca of our specimen has been damaged, the morphology of hyoid barbel is nearly identical with the original description and the accompanying drawing. However, several differences were observed in our specimen: short undivided proximal portion of barbel (vs. nearly branched to the base); shorter head length 46.7% SL (vs. 55% SL); broader head, its width (inter-sphenotic distance) 29.5% SL (vs. 20% SL); shorter jaws, upper jaw length 37.8% SL (vs. 48% SL) and lower jaw length 39.0% SL (vs. 50% SL); and the anterior branch of hyoid barbel clearly longer than that of holotype.

It is also notable that both male and female specimens have a relatively long caudal fin (53.6% SL in female and 37.5% SL in male).

Comparative materials. Bufoceratias wedli : HUMZ 148605 (1, 100.0), HUMZ 148606 (1, 51.0), 18°50.7'S, 11°19.2'E, off Namibia, 598–600 m, 3 Mar. 1995.

CAS 234701 (1, 127.0), CAS 222470 (1, 91.2), CAS 222471 (1, 118.4), CAS 222472 (1, 78.2), CAS uncat. (6, 19.4–86.9); all from Angola, SW Atlantic. Buforceratias shaoi : type series listed in Pietsch et al. (2004). Oneirodes pietschi : type series listed in Ho & Shao (2004).

Figures

FIGURE 22 Linophryne parini Bertelsen, 1980, HUMZ 194262, 66.4 mm SL, fresh.