Acropoma, Temminck and Schlegel, 1843

Okamoto, Makoto, 2014, Acropoma profundum, a New Species of Lanternbelly (Teleostei: Perciformes: Acropomatidae) from the Solomon Islands, Species Diversity 19 (1), pp. 9-14 : 12-13

Key to the species of Acropoma

1a. Luminous gland O-shaped (off New Caledonia and Okinawa, Japan; Fig. 2F )................................. A. lecorneti

1b. Luminous gland U-shaped or elongated ( Fig. 2 A–E)... 2

2a. Luminous gland U-shaped ( Fig. 2A, B, E ) ..................... 3

2b. Luminous gland elongated with anterior ends on isthmus and not connected ( Fig. 2C, D )............................... 5

3a. Posterior ends of luminous gland extending far beyond anus, nearly to anal-fin origin ( Solomon Islands; Fig. 2A ) ................................................... A. profundum sp. nov.

3b. Posterior ends of luminous gland extending slightly beyond anus, but distant from anal-fin origin ( Fig. 2B, E ) .............................................................................................. 4

4a. Front edge of luminous gland just reaching level of origin of pelvic fins (Andaman Sea and Bay of Bengal; Fig. 2B ).............................................................. A. argentistigma

4b. Front edge of luminous gland located well in front of origin of pelvic fins (Indo-Pacific; Fig. 2E ) ......................................................................... A. japonicum

5a. Anus pale and located nearer to origin of pelvic fin than to anal fin origin; proximal radial of first anal-fin pterygiophore not hollow (Bohol Sea; Fig. 2C ) ........... A. boholensis

5b. Anus black and located halfway between origins of pelvic fin and anal fin ( Fig. 3B ); proximal radial of first anal-fin pterygiophore hollow (southern Japan and South China Sea; Fig. 2D ) ................................ A. hanedai

Figures

Fig. 2. Schematic diagram of the luminous glands of all six known species of Acropoma. A, Acropoma profundum sp. nov.; B, A. argentistigma; C, A. boholensis (after Yamanoue and Matsuura 2002); D, A. hanedai; E, A. japonicum; F, A. lecorneti (after Yamanoue and Toda 2008).

Fig. 3. Ventral view of the abdomens of two species of Acropoma. A, Acropoma profundum sp. nov., holotype, MNHN 2002- 3878, 40.1mm SL; B, A. hanedai, FRLM 32251, 61.2mm SL, Taiwan.Arrows point to the anus.