Diceratias trilobus Balushkin & Fedorov, 1986

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 : 270-271

Diceratias trilobus Balushkin & Fedorov, 1986

Fig. 4

Diceratias trilobus Balushkin & Fedorov, 1986:855 , fig. (type locality: off Honshu, Japan, 1211–1216 m). Pietsch et al., 2006:S97. Pietsch, 2009:356.

Material. HUMZ 194412 (1, 53.1), st. 34, 8°37.7'S, 111°21.5'E – 8°37.8'S, 111°19.8'E, off Java, 595–600 m, 15 May 2005.

Description. Dorsal-fin rays 6; pectoral-fin rays 15; anal-fin rays 4; caudal-fin rays 9. Teeth on vomer 2 (1 on each side); upper jaw teeth 72; lower jaw teeth 43. Head length 46.2% SL; head depth 56.0; head width 35.5; frontal width 17.4; illicial length 23.2; distance between upper jaw symphysis and origin of illicium 9.4; upper jaw length 42.8; lower jaw length 50.6; width of esca 8.9; length of esca 10.8; longest teeth on upper jaw 5.7; longest teeth on lower jaw 7.0.

Body short and globular. Illicium short. Jaw large, oblique. Esca with single anterior and posterior appendages; anterior appendage longer than posterior appendage; each appendage bearing a terminal cirrus; 2 cirri on posterior margin of posterior appendage.

Distribution. Eastern Indian Ocean, western Pacific Ocean and South China Sea. Our specimen represents first record from Indonesia.

Remarks. The Indonesian specimen is smaller than most specimens examined in Pietsch et al. (2006), but agrees well with the data and description provided by them. However, a few differences were observed in the specimen: only two teeth on vomer (vs. 6–10 in Pietsch et al., 2006); relatively short illicium (23.2% SL, vs. 27.9–33.7% SL); relatively narrow and long esca, its width 8.9% SL (vs. 9.6–10.5% SL) and length 10.8% SL (vs. 5.8–7.9% SL); and relatively few jaw teeth, 72 (cf. 67–111) on upper jaw and 43 (vs. 51–68) on lower jaw.

Figures

FIGURE 4. Diceratias trilobus Balushkin & Fedorov, 1986, HUMZ 194412, 53.1 mmSL, fresh.