A new species of the greeneye genus Chlorophthalmus (Teleostei: Chlorophthalmidae) from the central North Pacific

Chlorophthalmus imperator sp. nov. (Teleostei: Chlorophthalmidae) is described on the basis of nine specimens (98.1-174.8 mm SL) from the Emperor Seamount Chain in the central North Pacific. The new species is characterized by the following combination of characters: 49-51 lateral-line scales; 6 scale rows above lateral line; 3 + 19-22 = 22-25 (modally 22) gill rakers; outermost tooth patches of lower jaw with 6-14 large thorn-shaped teeth, the tips projecting in advance of lower-jaw profile; lower-jaw symphysis with two distinct moderately-sized projections; tongue without teeth; pelvic-fin origin vertically below 4th or 5th (usually 5th) dorsal-fin ray base; head length 26.7-28.9 (mean 27.7) % SL; snout length 6.9-7.7 (7.3) SL; horizontal orbit diameter 11.9-12.9 (12.3) % SL; upper-jaw length 11.7-13.2 (12.6) % SL; maxillary depth 3.1-3.8 (3.4) % SL; pre-dorsal-fin length 34.2-36.6 (35.3) % SL; pre-pectoral-fin length 27.3-29.8 (27.9) % SL; anus to anal-fin origin length 27.3-29.9 (28.5) % SL; pectoral-fin length 21.0-24.9 (22.7) % SL.