Aldrovandia oleosa Sulak, 1977

Bañón, Rafael, Arronte, Juan Carlos, Armesto, Ángeles, Barros-García, David & Carlos, Alejandro De, 2016, Halosaur fishes (Notacanthiformes: Halosauridae) from Atlantic Spanish waters according to integrative taxonomy, Zootaxa 4184 (3), pp. 471-490 : 483-485

Aldrovandia oleosa Sulak, 1977

Fig. 7.

Aldrovandia oleosa Sulak, 1977:12 , Figs. 1, 2 left, 3 upper, 4 (A–C).Tongue-of-the-Ocean, Bahamas, 23°38.5'–23°40.3'N, 76°47.75'–76°45.1'W, depth 1,324–1,307 meters. Holotype: USNM 214590. Sulak 1977: 11 –20 (description, key); Filatova 1985: 32 –34 (description, key); Smith 2003 (key); Kamikawa & Stevenson 2010 (description).

Material examined. MHNUSC 25012- 1, 226 mm TL, 7th August 2011, Galicia Bank ; 42º56.172'N— 11º55.816'W, 1,545 m depth; MHNUSC 25012- 2, 305 mm TL, 7th August 2011, Galicia Bank , 42º56.172'N— 11º55.816'W, 1,545 m depth; MHNUSC 25012- 3, 274 mm TL, 7th August 2011, Galicia Bank , 42º56.172'N— 11º55.816'W, 1,545 m depth; MHNUSC 25012- 4, 317 mm TL, 7th August 2011, Galicia Bank , 42º56.172'N— 11º55.816'W, 1545 m depth; MHNUSC 25012- 5, 255 mm TL, 7th August 2011, Galicia Bank , 42º56.172'N— 11º55.816'W, 1,545 m depth; MHNUSC 25012- 6, 269 mm TL, 7th August 2011, Galicia Bank , 42º41.771'N— 011º33.647'W, 1,477 m depth; MHNUSC 25012- 7, 330 mm TL, 8th August 2011, Galicia Bank ; 42º43.536'N— 11º28.128'W; 1751 m depth; MHNUSC 25012- 8, 342 mm TL, 8th August 2011, Galicia Bank , 42º43.536'N— 11º28.128'W, 1,751 m depth; MHNUSC 25012- 9, 333 mm TL, 8th August 2011, Galicia Bank , 42º43.536'N— 11º28.128'W, 1,751 m depth; MHNUSC 25012- 10, 347 mm TL, 8th August 2011, Galicia Bank , 42º43.536'N— 11º28.128'W, 1,751 m depth; MHNUSC 25012- 11, 205 mm TL, 7th August 2011, Galicia Bank , 42º56.172'N— 11º55.816'W, 1545 m depth; MHNUSC 25012- 12, 381 mm TL, 7th August 2011, Galicia Bank , 42º56.172'N— 11º55.816'W, 1,545 m depth; MHNUSC 25012- 13, 352 mm TL, 7th August 2011, Galicia Bank , 42º56.172'N— 11º55.816'W, 1,545 m depth; MHNUSC 25012- 14, 259 mm TL, 7th August 2011, Galicia Bank , 42º56.172'N— 11º55.816'W, 1,545 m depth; MHNUSC 25012- 15, 397 mm TL, 7th August 2011, Galicia Bank , 42º56.172'N— 11º55.816'W, 1,545 m depth; MHNUSC 25012- 16, 287 mm TL, 7th August 2011, Galicia Bank , 42º56.172'N—11º55.816'W, 1,545 m depth.

Description. Body shape eel-like, moderately compressed, elongated and attenuated to the caudal peduncle; scales absent on top of head and opercle; the pre-oral length is very short and is contained 3–5.3 times in the snout length; palatine tooth patch separated from pterygoid by a distance 0.7–1.7 times its length; first dorsal ray very short and vestigial; dorsal fin origin posterior to pelvic fin origin; anal opening white, surrounded by a ring of darkly pigmented tissue; pyloric caeca black. The main morphometric and meristic characteristics are presented in Table 8 .

Aldrovandia oleosa MHNUSC Sulak, 1977 Filatova, 1985

25012 (1–16) N=8 N=17 Total Length (mm) 205–397 — 100–300 Preanal length (mm) 88–157 — 50–120 FIGURE. 6 Aldrovandia phalacra from the northeastern Atlantic Ocean, MHNUSC 25014- 2, 330 mm total length.

FIGURE. 7 Aldrovandia oleosa from the northeastern Atlantic Ocean, MHNUSC 25012- 8, 342 mm total length.

Habitat and distribution. Benthopelagic to benthic on the lower slope, continental rise and upper abyss, between 1,100 and 3,300 m depth and primarily between 2 and 4ºC isotherm ( Sulak 1990). Circumglobal at tropical and temperate latitudes. Western Atlantic, from Canada to Venezuela and Guyana; eastern Atlantic, off northwestern Africa, Azores Islands and the Gulf of Guinea ( Sulak 1977, 1990); Indian Ocean, from Saya-de- Malaya Bank and the East Indian Range ( Filatova 1985), and eastern, central and northern Pacific Ocean and waters off of Chile ( Froese & Sampang 2004; Kamikawa & Stevenson 2010; Hanke et al. 2014).

Tables

TABLE 8. Comparison of morphometric, meristic data and respective body proportions for specimens of Aldrovandia oleosa.

Gnathoproctal length (mm)	78–143	—	—
As % GPL Head length Eye diameter	33.8–43.6 3.1–5.1	— —	— —
Preorbital length Postorbital length	15.5–19.2 14.1–19.2	— —	— —
Interorbital length Preoral snout length Predorsal length Dorsal base length	3.8–5.3 3.3–5.8 72.4–83.2 7.8–12.5	— — — —	— — — —
Pectoral length Prepelvic length	7.3–20.5 64.6–73.2	— —	— —
Pelvic length Body depth Meristic features Dorsal fin rays	4.4–11.9 11.3–17.6 I+9–11	— — 10–11	— — 9–10
Ventral fin rays Pectoral fin rays	I+8–9 I+8–11	I+8–9 I+9–11	8 9–11
SLL to anus SLL to pelvic origin Scales above lateral line Branchiostegal rays	19–22 (9) 10–11 (12) 10–11 (11) 9–11	16–23 — — 9–11	16–20 8–10 10–11 9–10
Gill rakers Pyloric caeca	4–6+1+15–17 7–9	19–23 5–8	17–19 6–8