| Pigmented branchiostegal membranes; pigment dorsally on head spreads laterally in postflexion stage; compared with A. guadalupensis, eyes tend to be larger and rounder and caudal peduncle slightly shorter.
Pigmentation:
Preflexion: Anteriorly on forebrain; few to many in longitudinal medial band over midbrain; laterally on posterior margin of midbrain; dorsally and dorsolaterally posteriorly on hindbrain by 3.4 mm; 0-2 on gular area; 2-several on isthmus; on branchiostegal membranes, primarily on lower half; dorsally on gas bladder and hindgut; 1-several ventrally on anterior half of gut.
Flexion: On anterior margin of forebrain by 4.3 mm; ventrolaterally on hindbrain by 4.3 mm; spreading upward from branchiostegal membrane onto gill cover by 4.1 mm; internally on anterior margin of gut.
Postflexion: Spreading laterally from medial midbrain band to cover all of midbrain area by 8 mm; hindbrain covered by 7.5 mm; 1 below mideye at 8 mm; internally anterior to heart by 4.7 mm; usually none ventrally on gular area, isthmus, and gut after 5 mm.
Transformation: Patch forms over hypural area at 11 mm; bar begins to form below dorsal fin 1-3 at the end of transformation stage; decreasing on branchiostegal membrane after 12 mm.
Sequence of fin development: principal caudal fin rays, second dorsal fin and anal fin, first dorsal fin, pectoral fin and procurrent caudal fin rays; pelvic fin. |
