Hypopterus Gill 1861

Iwatsuki, Yukio, Newman, Stephen J., Tanaka, Fumiya & Russell, Barry C., 2018, Validity of Psammoperca datnioides Richardson 1848 and redescriptions of P. waigiensis Cuvier in Cuvier & Valenciennes 1828 and Hypopterus macropterus (Günther 1859) in the family Latidae (Perciformes) from the Indo-West Pacific, Zootaxa 4402 (3), pp. 467-486 : 476

Genus Hypopterus Gill 1861

Diagnosis. Distinguished from other latid genera by the following combination of characters: scales on smooth horizontal limb of the preopercle; nostrils widely separated on each side of the head, anterior nostril a tube-shaped flap and posterior nostril oval and greatly enlarged; large observable scales on posterior part of maxilla ( Fig. 3B ); pored lateral line scales extending onto median membrane of caudal-fin rays; no tooth patches on supralamellar tooth patch on the outer face of the first four gill arches and no tooth patch on the basihyal; denticulations on ventral border of first and second infraorbital bones; no parapophysis on the first 5 abdominal vertebrae; epineurals on the first 7‒8 abdominal vertebrae; supraneural bones formula 0/0/0 + II/I + I/; dorsal-fin rays VII‒ I, 15; anal-fin rays III, 14; caudal fin with posterior border rounded; procurrent spur present; caudal spur absent; vertebrae 11 + 14 = 25.

Occurrence. A single species known only from the coastal waters of northwestern Australia.

Figures

FIGURE3. Snout regionof four latidspecies: A, Lates japonicus, MUFS 11877, 253 mm SL, Miyazaki,Japan; B, Hypopterus macropterus, WAM P.30681-004, 138 mm SL, Shark Bay, Western Australia; C, Psammoperca datnioides, WAMP.34451-001 (024,X), 204 mmSL, Corronban Coastnear Shark Bay, Western Australia; D, Psammoperca waigiensis, Chantaburi,Thailand.