Owstonia hastata

description

Description. (Where counts vary, those of the paratype are given in parentheses.) A species of Owstonia with LL pattern type 1, consisting of a simple lateral line that originates from posttemporal sensory canal near anterodorsal margin of gill opening, curves upward and backward then continues posteriorly just below dorsal-fin base to soft ray 18. Dorsal fin IV, 22; anal fin II, 14; pectoral fin 19 ‒ (20); gill rakers 16 + 29 (30) = 45 (46). Vertebrae: precaudal 13, caudal 17, total 30; anal-fin pterygiophores anterior to 1 st haemal spine 5. Oblique body scale rows in mid-lateral series about 38; nape scaly and cheek scale rows 3 – 4. Lower limb margin of preopercle with about 8 − 12 well-developed spines. Papillae in slight depression behind tip of premaxillary ascending processes 4, arranged in 2 rows with posterior pair of papillae larger than the others. Teeth in outer row of each premaxilla 20 (21); no inner teeth anteriorly. Teeth in lateral row of each dentary 10 / 14 (10), with anterior ones moderately hooked and spaced apart; symphyseal teeth 4 / 5 (4), short and conical, and with 2 / 3 (2 − 3) inner teeth anteriorly. Pelvic fin possibly sexually dimorphic, depressed fin

Hidden diversity in deep-water bandfishes: review of Owstonia with descriptions of twenty-one new species (Teleostei: Cepolidae: Owstoniinae)

diagnosis

Diagnosis. A species of Owstonia with LL pattern type 1; dorsal fin IV, 22; and anal fin II, 14; oblique body scales 38; lower margin of preopercle with about 11 or 12 well-developed spines; pelvic fin 34.4 ‒ 42.1 % SL.

Hidden diversity in deep-water bandfishes: review of Owstonia with descriptions of twenty-one new species (Teleostei: Cepolidae: Owstoniinae)

distribution

Distribution. (Fig. 26) Known only from Queensland, Australia where trawled in 228 ‒ 260 m.

Hidden diversity in deep-water bandfishes: review of Owstonia with descriptions of twenty-one new species (Teleostei: Cepolidae: Owstoniinae)

etymology

Etymology. From the Latin hastatus (spear-shaped), in allusion to the lanceolate caudal fin.

Hidden diversity in deep-water bandfishes: review of Owstonia with descriptions of twenty-one new species (Teleostei: Cepolidae: Owstoniinae)