Acropomatidae

Schwarzhans, Werner W. & Prokofiev, Artem M., 2017, Reappraisal of Synagrops Günther, 1887 with rehabilitation and revision of Parascombrops Alcock, 1889 including description of seven new species and two new genera (Perciformes: Acropomatidae), Zootaxa 4260 (1), pp. 1-74 : 12-13

Key to the genera of Acropomatidae

1 Abdominal luminous organ present................................................................ Acropoma

- Abdominal luminous organ absent........................................................................2

2 Pelvic-fin spine serrated............................................................................... 3

- Pelvic-fin spine smooth................................................................................. 4

3 D1 with IX spines visible externally; anal fin II + 7 to III + 6; if III, the third spine is weaker than the second; predorsal formula /0+0/0+2/; 8th interneural gap vacant; denticles present on ectopterygoid.............................. Parascombrops

- D1 with VIII visible spines (ninth spine strongly reduced and visible as a minute element on radiographs only); anal fin III + 9, all three spines of similar strength; predorsal formula 0/0/0+2/; 8th interneural gape with a corresponding D1 pterygiophore; no denticles on ectopterygoid................................................................. Caraibops n. gen.

4 No canines in jaws; chin often with antrorse spines................................................. Malakichthys

- At least symphyses of the premaxillae and dentaries with a pair of strong canines; chin always without antrorse spines..... 5

5 Swimbladder reaching cranium, with anterior part bifurcate, embraced by basioccipital fossae of skull; otolith with downward- inclined, triangular ostium and sharply bent cauda........................................................... 6

- Swimbladder not reaching cranium; basioccipital fossae absent; otolith with oval, horizontal ostium and nearly straight cauda.................................................................................................... 9

6 Body red in color, oral cavity black............................................................. Doederleinia

- Body brownish, grayish or blackish, oral cavity pale..........................................................7

7 Gill rakers on 1st arch 27–30; myodome closed posteriorly............................................. Apogonops

- Gill rakers on 1st arch 19–26; myodome open posteriorly......................................................8

8 Anal fin with 3 spines; top of head scaled; ectopterygoid without denticles............................. Neoscombrops

- Anal fin with 2 spines; top of head naked; numerous denticles on ectopterygoid............................ Synagrops

9 Supraneurals 2, predorsal formula /0/0+2/; dorsal fish profile regular, shallow ( Fig. 5A ); second and third anal-fin pterygio- phores separated by second haemal spine; dorsal otolith rim more strongly convex than ventral otolith rim.................................................................................................... Kaperangus n. gen.

- Supraneurals 3, pterygiophore formula 0/0/0+2/; dorsal fish profile hump-backed ( Fig. 32A, C ); second and third anal-fin pterygiophores placed before second haemal spin; ventral otolith rim more strongly convex than dorsal otolith rim... Ferilus

Figures

FIGURE 5 A – B. Kaperangus microlepis (Norman, 1935) n. gen.; CAS 222834, 78.5 mm SL.

FIGURE 32 A – D. Ƒerilus pseudomicrolepis (Schultz, 1940); A – B, USNM 436691, 88 mm SL. Ƒerilus sordidus Poey, 1860; C, CAS 30647, 225 mm SL., D, USNM 12565, 186 mm SL.