Psednos

• Main Author: Stein, David L.
• Format: Text
• Language: unknown
• Published: Zenodo 2012
• Subjects: Biodiversity; Taxonomy; Animalia; Chordata; Actinopterygii; Scorpaeniformes; Liparidae; Psednos; New Zealand; Pacific; North Atlantic
• Online Access: https://dx.doi.org/10.5281/zenodo.6173276; https://zenodo.org/record/6173276

Key to New Zealand Psednos species 1 Vertebrae more than 50 (≥ 11 abdominal vertebrae). Coronal pore absent........................................ 2 - Vertebrae 50 (≤ 10 abdominal vertebrae) or fewer. Coronal pore present or absent................................. 9 2 Peritoneum externally silvery when viewed at an angle. Gill opening ~ 9 % SL, mandible to abdomen end ~ 44 % SL............................................................................................. P. argyrogaster n. sp. - Peritoneum black or dark when viewed at an angle, not silvery. Gill opening 7 % SL or less, mandible to abdomen end less than 37 % SL............................................................................................. 3 3 Posterior corner of lower jaw with two spines (Fig. 28). Pectoral symphysis to abdomen end ~ 120 % HL. Preanal fin length 190 % HL, anus to anal fin length 116 % HL................................................. P. cryptocaeca n. sp. - Posterior corner of lower jaw with sharply angled retroarticular, anterior blunt spine absent. Pectoral symphysis to abdomen end about or less than 115 % HL. Preanal fin length less than 170 % HL, anus to anal fin length less than 100 % HL........ 4 4 Distance mabd about 187 % HL, pabd about 115 %............................................ P. longiventris n. sp. - Distance mabd less than 165 % HL, pabd less than 107 % HL.................................................. 5 5 Angle of mouth cleft about 30 degrees or less. Spinal hump prominent. Orbit greater than 30 % HL.................... 6 - Angle of mouth cleft 50–60 degrees, distinctly more than 30 degrees. Spinal hump prominent or moderate. Orbit less than 30 % HL................................................................................................. 8 6 Vertebrae 53, dorsal fin rays 45, pectoral fin rays 13, snout to anus distance 25 % SL, anus to anal fin distance 65 % HL, predorsal fin length 100 % HL, preanal fin length 130 % HL........................................... P. struthersi n. sp. - Vertebrae 59, dorsal fin rays 49–53, pectoral fin rays 16–17, snout to anus distance 20 % SL, anus to anal fin distance greater than 85 % HL, preanal fin length greater than 155 % HL, predorsal length 125 % HL................................. 7 7 Dorsal fin rays 53, dorsal fin origin between vertebrae 4–5. Upper jaw about 50 % HL, snout 17 % HL.... P. c h a t h a m i n. sp. - Dorsal fin rays 50, dorsal fin origin between vertebrae 7–8. Upper jaw about 40 % HL, snout 27 % HL..................................................................................................... P. platyoperculosus n. sp. 8 Dorsal fin insertion between vertebrae 5–6. First three neural spines much thicker than those posteriorly. Mouth angle 60 degrees. First three or four vertebrae forming a strong spinal curve reflected in a prominent hump, its posterior margin forming abrupt angle with body taper................................................................. P. nemnezi n. sp. - Dorsal fin origin between vertebrae 7–8. First four neural spines thicker, spines 3 and 4 forked. Mouth angle 50 degrees. Dorsal hump moderate, its posterior margin blending smoothly into taper of body....................... P. sp. NMNZ 25760 9 Mouth small, upper jaw 26 % HL. Premaxillary teeth tiny (visible only at 50 x magnification), forming band near symphysis 3 or fewer teeth wide. V 49............................................................... P. microstomus n. sp. - Mouth large, upper jaw more than 40 % HL. Premaxillary teeth small, visible at much less than 50 x magnification. Vertebrae fewer than 49....................................................................................... 10 10 Gill rakers paired, with parallel rows of spinules. Upper jaw about 60 % HL. V ~ 42, P 14.................................................................................................. Psednos sp. 2 Chernova and Stein 2002 - Gill rakers mostly alternating, spinules irregularly arranged. Upper jaw about 50 % HL. V 40, P unknown..................................................................................... Psednos sp. 3 Chernova and Stein 2002 : Published as part of Stein, David L., 2012, A Review of the Snailfishes (Liparidae, Scorpaeniformes) of New Zealand, Including Descriptions of a New Genus and Sixteen New Species, pp. 1-54 in Zootaxa 3588 on page 33, DOI: 10.5281/zenodo.283120 : {"references": ["Chernova, N. V. & Stein, D. L. (2002) Ten new species of Psednos (Pisces, Scorpaeniformes: Liparidae) from the Pacific and North Atlantic Oceans. Copeia, 2002 (3), 755 - 778."]}