EGG INFORMATION
Egg Diameter (min-max in mm): Number of Oil Globules (min-max): Oil Globule Diameter (min-max in mm): Yolk: Chorion: Egg/Embryo Pigment: Pigment Diagnostics: Diagnostic Characters:
LARVAE INFORMATION
Hatch Size (min-max in mm SL): Preanal Length (%SL): 50 - 60
Flexion Length (in mm SL): Length at Transformation (in mm SL): Reduction in length and change in body shape
Fin Development Sequence: Caudal and pectorals, dorsal and anal, pelvics
Larval Pigment Regions: In each developmental larval stage, pigment is present in the regions listed below
(click for
pigment regions)
Yolk-sac: mediolateral, caudal,
Preflexion: mediolateral, caudal,
Flexion: mediolateral, caudal,
Postflexion: dorsal gut, mediolateral, caudal,
Juvenile: mouth, crown, nape, cheek, isthmus, dorsal gut, lateral gut, ventral gut, pectoral fin, dorsal, ventral, mediolateral, caudal,
Pigment Diagnostics: Specimens described to 15 mm SL appear to lack postanal pigment, except in the peduncle area
Diagnostic Characters: Upper preopercular spine bent downward whereas same spine in Argyropelecus sladeni is pointed slightly upward, specimens described to 15 mm SL appear to lack pigment on postanal body, specifically in the peduncle area; presence of frontal crest. Through early postflexion stage, preanal length usually will distinguish A. affinis and A. sladeni (shorter preanal length) from A. hemigymnus and A. lychnus (longer preanal length), and presence/absence of internal caudal peduncle pigment will distinguish A. affinis and A. lychnus (pigment present) from A. hemigymnus and A. sladeni (pigment absent).
