Ophthalmolycus andersoni Matallanas, 2009, sp. nov.

• Main Author: Matallanas, Jesús
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2009
• Subjects: Biodiversity; Taxonomy; Animalia; Chordata; Actinopterygii; Perciformes; Zoarcidae; Ophthalmolycus; Ophthalmolycus andersoni; Antarc*; Antarctic; Antarctic Peninsula
• Online Access: https://doi.org/10.5281/zenodo.5631394; http://treatment.plazi.org/id/03C521056F5ADF48FF5F30B49DB1FBE1

Ophthalmolycus andersoni sp. nov. (Figs. 1 –2; Table 1) Holotype. UAB:B03BSZ 25, 263 mm SL male, Paradise Bay, Antarctic Peninsula, cruise BENTART-03, R/V “Hespérides” stn 22A, 64º 50’ 37’’S, 62º 58’ 09’’W, collected with an Agassiz trawl at 286 m depth, 24 February 2003. Paratypes. UAB:B03BSZ 9, 255 mm SL male, same collection data as holotype; and UAB:B03BSZ 99, 212 mm SL female, same collection data as holotype. Diagnosis. A species of Ophthalmolycus as defined by Anderson (1992, 1994) with the following combination of characters: 6 branchiostegal rays; pectoral fin origin well below midbody, pectoral base extending ventrally to abdomen; lateral line double with ventral and medio-lateral branches; oral valve not reaching anterior edge of vomer; gill slit extending ventrally well below ventral end of pectoral fin base; vertebrae asymmetrical 22+70–74=92–96; dorsal fin origin associated with vertebrae 4 or 5 with no supraneurals; pectoral fin rays 16 or 17; postorbital pores two (positions one and four); 2 well developed pyloric caeca and 0–3 pseudobranch filaments. Description. Body laterally compressed and relatively short; tail laterally compressed, especially posteriorly (Fig. 1). Head nearly triangular in cross section; eye ellipsoid, not entering dorsal profile of head. Scales small, sparse, present only on tail and un-paried fin bases. Gill slit extending ventrally well below lower edge of pectoral fin base (Fig. 1 c). Triangular opercular flap at upper end of gill slit. Pectoral-fin origin well below midbody, pectoral-fin base with its lower end on abdomen, pectoral-fin margin rounded; ventralmost 5–7 rays thickened, tips exserted (Fig. 1 c). Upper jaw protruding, end of maxilla extending to posterior margin of eye; upper jaw length apparently dimorphic, longer in the two males than in the female. Head wider in the adult male (holotype) than in paratypes (immature male and female). Mouth inferior; lower lip with a small lobe. Nasal tube long, unpigmented, overhanging upper lip. Oral valve not reaching ...