| light organs |
| normal (not striking) |
|
| light organs |
| elongated |
| pigmented |
pigmented |
| no spines |
no spines |
| no rows |
| no other melanophores |
| melanophores on head |
| dorsal + ventral + lateral row |
| no other melanophores |
| melanophores on head + trunk |
| unpigmented |
unpigmented |
| normal melanophores at fin base |
| fin rays only without melanophores |
| Head large and compressed; large jaws and moderately large teeth of nearly uniform size; body tapered and compressed becoming stout in postflexion stage; gut short and strongly flexed, becoming straighter and moderate in length; pigment pattern distinct with supra- and postorbital melanophores; no pigment above brain; Br2 photophores form at about 6.3 mm.
Pigmentation:
Preflexion: pair on snout by 2.7 mm; 1 above eye by 3.5 mm; pair on terminal gut section and above gas bladder by 4.0 mm; 1 posterior to eye and at nape (in some specimens) by 4.5 mm.
Flexion: 1 embedded anterior to upper margin of pectoral fin base; 1 embedded in upper gill arch region; series above gas bladder.
Postflexion: by about 8.6 mm, 1 on preopercle posterior to the one at postorbital region and myosepta becoming outlined in gut region.
Sequence of fin development: caudal and dorsal and anal and pectorals and pelvics. |