Cottunculus tubulosus Byrkjedal & Orlov, 2007, sp.n.

• Main Authors: Ingvar Byrkjedal, Alexei M. Orlov
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2007
• Subjects: Biodiversity; Taxonomy; Animalia; Chordata; Scorpaeniformes; Psychrolutidae; Cottunculus; Cottunculus tubulosus; North Atlantic
• Online Access: https://doi.org/10.5281/zenodo.6243342; http://treatment.plazi.org/id/1AA50DDB815B6CA772895E7E7037D5EE

Cottunculus tubulosus sp.n. (Figs. 2-3) Holotype. male, NORTH ATLANTIC, 51°45'N - 29°33'W, 17 July 2004, 1950-1872 m depth, soft bottom, R/V G.O.Sars, super station 56, local station 378, bottom trawl. ZMUB 16361. Diagnosis. The species differs from other species of Cottunculus by having very prominent tubes externally visible along all of the lateral line, and dense single and double prickles, readily apparent to the unaided eye, covering the body. The head is fairly slender and head tubercles are well developed, as are the infraorbital (non-paired) and preopercular spines. The peduncle is short and relatively deep. Description. SL 47, 0 mm, fresh weight 3.7g. Other measurements are given in Table 1 and meristic characters in Table 2. General shape fairly slender and elongated for a Cottunculus, with a marked convex nuchal area and a short caudal peduncle no longer than its depth (Fig. 2 and 3). From above the snout has a convex outline, and regularly sectioned bony tubes stand out clearly all along the lateral line, extending on to the caudal fin. Snout and interorbital areas concave, the latter displaying prominent orbital rims. Cranial spines well developed. Following the numbering of Nelson & Nakamura (1980), and Nelson (1982), spine 1 not apparent, while the most prominent spines are 6>3>5>4>2. Spines of pair number 2 (interorbital spines) are least spaced, followed by 3<6<4<5. There are two distinct tabular spines. Opercular with 5-6 fan-spread ridges, lowermost of which ending in 3 minor spines. Suborbital, mandibular and preopercular pores large and separated by single (non-paired) bony spines which point obliquely outwards-downwards. A single large median chin pore present. A pore present midlaterally on the operculum posterior to a single spine. Nasal spines present but small. Anterior pair of nostrils with long tubular openings, posterior pair without tubular openings. Lateral line pores situated on the posterior end of the lateral line bony tubes, but with no tubular ...