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): Flexion Length (in mm SL): <6.9
Length at Transformation (in mm SL): Fin Development Sequence: Caudal, pectorals, anal, dorsal, pelvics
Larval Pigment Regions: In each developmental larval stage, pigment is present in the regions listed below
(click for
pigment regions)
Yolk-sac:
Preflexion: dorsal gut, lateral gut, ventral gut, caudal finfold, ventral,
Flexion: dorsal gut, lateral gut, ventral gut, caudal finfold, ventral,
Postflexion: dorsal gut, lateral gut, caudal finfold, ventral,
Juvenile: mouth, crown, nape, cheek, isthmus, dorsal gut, lateral gut, ventral gut, dorsal finfold, anal finfold, caudal finfold, pectoral fin, dorsal, ventral, mediolateral, caudal,
Pigment Diagnostics: Distinguished from other myctophids with round eyes by: head unpigmented, postanal ventral melanophores (<15), melanophores at base of caudal-fin rays. Distinguished from Stenobrachius leucopsarus by: presence of pigment at caudal base, number of postanal ventral melanophores, postanal ventral melanophores appear more embedded
Diagnostic Characters: See myctophid photophore figure. Number of photophores in larvae (sequence of formation of photophores: Br2, PO5, PO1 [VO1, PO2, OP2, VO5, PO3, PO4, VLO]; photophores in brackets appear in late larval period). Distinguished from other myctophids with round eyes by: body moderately slender, head moderate in size and unpigmented, postanal ventral melanophores (<15), melanophores at base of caudal-fin rays. Distinguished from Stenobrachius leucopsarus by: pigment at caudal base, postanal ventral melanophores appear more embedded
