Latidae, Jordan, 1888

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 : 482

Key of genera to the family Latidae

1a. Nostrils of each side close together ( Fig. 3A ); lower edge of preopercle with 3 or 4 large flat spines..................................................................................... Lates (11 valid species; see Eschmeyer 2016)

1b. Nostrils widely separated on each side of the head ( Fig. 3B–D ); lower edge of preopercle with only 1 spine present at angle...................................................................................................... 2

2a. Large observable scales on posterior part of maxilla ( Fig. 3B ); dorsal-fin rays VII-I, 14–15; 43–44 pored lateral-line scales; eight indistinct dark bands on head and body............................................. Hypopterus macropterus

2b. Tiny scales (not visible to the naked eye, but visible through binocular microscope) on posterior uppermost part of maxilla ( Fig. 3C–D ); dorsal-fin rays VII-I, 12–13; 46–54 pored lateral-line scales; yellow longitudinal stripe from lower margin of infraorbital margin to posterior spine of preopercular flange in fresh............................................. 3

3a. Dense black or brownish colour on head and body; pored lateral-line scales same colour of other scales of body ( Fig. 1B ); pored lateral-line scales 49–54; dorsal soft rays 12; Last dorsal-fin spine / Penultimate dorsal-fin spine 0.9–1.1............................................................................................. Psammoperca datnioides

3b. Brownish colour on head and body (often golden colour in live specimens); pored lateral-line scales yellow edged ( Fig. 1C ); pored lateral-line scales 46–48; dorsal soft rays 13; Last dorsal-fin spine / Penultimate dorsal-fin spine 1.5–1.7............................................................................................. Psammoperca waigiensis

Figures

FIGURE 1. Psammoperca datnioides Richardson 1848 (A–B) and Psammoperca waigiensis (C). A, NTM S.16708-077, Neotype, 138 mm SL, Bullocky Point Reef, Darwin, Northern Territory; B, WAM P. 344852-001, 204 mm SL, Carnarvon Harbour, Western Australia; C, MUFS 43427, 241 mm SL, OkinawaIsland, Ryukyu Is., Japan.

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.