Sagittalarva inornatus

description

Description. Dorsal rays IX, 12; anal rays III, 12; all dorsal and anal rays branched, the last to base; pectoral rays 13 (12 plus uppermost rudimentary ray); pelvic rays I, 5; principal caudal rays 14, median 12 branched, upper procurrent rays 6, lower procurrent rays 5, last procurrent ray segmented; lateral-line continuous, inclined sharply downward below soft portion of dorsal fin, the pored scales 26 plus one pored scale on caudal fin base; canals on scales with a single pore; gill rakers 10 on lower limb including angle, 6 on upper limb, larger gill rakers serrated and branched, some antler-like; branchiostegal rays 5; vertebrae 25. Body proportions as % of SL for 162 mm male (136 mm SL male in parentheses). Body long and slim, maximum body depth 21.6 (21.3) % or 4.6 in SL (4.7); body very compressed, width 10.5 (9.0) % or 2.1 in depth (2.4); head length 31.5 (31.1) % or 3.2 in SL (3.2); snout long, length 9.6 (9.0) % or 3.3 in HL (3.4); orbit diameter 5.6 (5.1) % or 5.7 in HL (6.0); interorbital width 5.6 (4.7) % or 5.7 in HL (6.6); caudal peduncle narrow, depth 10.5 (11.8) % or 3.0 in HL (2.6); caudal-peduncle length 11.7 (11.8) % or 2.7 in HL (2.6). Mouth small, terminal,

Rediscovery of Sagittalarva inornata n. gen., n. comb. (Gilbert, 1890) (Perciformes: Labridae), a long-lost deepwater fish from the eastern Pacific Ocean: a case study of a forensic approach to taxonomy using DNA barcoding

description

Pseudojulis sp. Victor, 1987: 146, Fig. 1 (0.81 ° N, 86.23 ° W; 400 km E. of Galápagos). Halichoeres cf. malpelo Beltrán-Leon & Herrera, 2000: 524, Fig. 181 (continental coastline of Colombia). Halichoeres raisneri Baldwin & McCosker, 2001: 89, figs. 4 – 5 (type locality, 1.39 ° N, 91.81 ° W; Wolf Island, Galápagos, Ecuador). Halichoeres cf. raisneri Bussing & Lopez, 2004: 120 (5.57 ° N, 87.03 ° W; Cocos Island, Costa Rica). Halichoeres sp. Bussing & Lopez, 2004: 121, figure (5.57 ° N, 87.03 ° W; Cocos Island, Costa Rica).

Rediscovery of Sagittalarva inornata n. gen., n. comb. (Gilbert, 1890) (Perciformes: Labridae), a long-lost deepwater fish from the eastern Pacific Ocean: a case study of a forensic approach to taxonomy using DNA barcoding

diagnosis

Diagnosis. Dorsal rays IX, 12; anal rays III, 12; pectoral rays 13 (12 plus uppermost rudimentary ray); lateralline continuous, inclined sharply downward below soft portion of dorsal fin, the pored scales 27, canals on scales with a single pore; head naked except for a set of small scales on each side of nape forward of the dorsal-fin origin; scales on thorax much smaller than body scales; jaws with a single pair of enlarged canine teeth at the front of the upper jaw (one tooth per side) and a single pair at the front of the lower jaw (one tooth per side) which fit between the upper pair when the mouth is closed; teeth behind enlarged canines in a regular row of caniniform to conical teeth; no posterior canine at the corner of the mouth; posterior half of upper lip with a dorsal fleshy flap, variably developed; 10 + 6 gill rakers, larger ones serrated and branched; snout long and pointed, snout length 3.3 – 3.4 in HL for fish over 70 mm SL (3.36 in holotype); body slender, depth of body 4.6 – 4.7 in SL for fish over 70 mm SL (4.57 in holotype, “ depth 5 2 / 3 in length ” in Gilbert (1890) must refer to TL); body very compressed, body width 9.0 - 10.5 % SL; dorsal-fin spines pungent

Rediscovery of Sagittalarva inornata n. gen., n. comb. (Gilbert, 1890) (Perciformes: Labridae), a long-lost deepwater fish from the eastern Pacific Ocean: a case study of a forensic approach to taxonomy using DNA barcoding

materials_examined

Material examined. USNM 44273, 73 mm SL, Cabo San Lucas, Baja California, Mexico, 22.87 ° N, 109.92 ° W, Albatross, dredge, 31 fathoms, 1 May 1888 (holotype of Pseudojulis inornatus); USNM 357795, 90 mm SL, SE Wolf Island, Galápagos Islands, 1.39 ° N, 91.81 ° W, submersible JSL-II-sta. 3087, 115 m, C. Baldwin & J. Gomezjurado, 22 June 1998 (holotype of Halichoeres raisneri); CAS 209810, 2: 39.8 – 78.8 mm SL, 1.39 ° N, 91.81 ° W, submersible JSL-II-sta. 3086, 114 – 125 m, C. Baldwin & J. McCosker, 22 June 1998 (paratypes of Halichoeres raisneri); SIO 65 - 250, 106 mm SL, Isla Cerralvo Channel, Baja California, Mexico, 24.19 ° N, 109.99 ° W, Horizon, trawl, up to 46 fathoms, 2 July 1965; SIO 07 – 34, 162 mm SL, Gordo Bank, San Jose del Cabo, Baja California, Mexico, 23.02 ° N, 109.50 ° W, hook and line, 50 – 100 m, John Snow, 15 February 2007; SIO 07 - 94, 136 mm SL, San Luis Canyon, San Jose del Cabo, Baja California, Mexico 23.05 ° N, 109.40 ° W, hook and line, 50 – 100 m, John Snow, 21 July 2007; SIO 11 - 386, 31: 7.0 – 14.0 mm SL, open ocean 400 km E. of Galápagos Islands, 0.81 ° N, 86.23 ° W, plankton net, 0 – 100 m, B. Victor, 10 March 1985.

Rediscovery of Sagittalarva inornata n. gen., n. comb. (Gilbert, 1890) (Perciformes: Labridae), a long-lost deepwater fish from the eastern Pacific Ocean: a case study of a forensic approach to taxonomy using DNA barcoding