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
Flexion Length (in mm SL): 7.2 - 8.8
Length at Transformation (in mm SL): 12 - 15, as large as 18
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: none,
Flexion: lateral gut,
Postflexion: dorsal gut, lateral gut,
Juvenile: mouth, crown, nape, cheek, isthmus, dorsal gut, lateral gut, ventral gut, pectoral fin, dorsal, ventral, mediolateral, caudal,
Pigment Diagnostics: Single spot over gut and lack of pigment elsewhere in flexion and postflexion larvae. Genus distinguished from other myctophids with elliptical eyes by: relatively lightly pigmented. Distinguished from Protomyctophum thompsoni by: lack of postanal ventral melanophores in preflexion larvae and presence of only one spot over the gut in larger larvae
Diagnostic Characters: Single spot over gut and lack of pigment elsewhere (flexion and postflexion larvae). Genus distinguished from other myctophids with elliptical eyes by: head small, body slender, gut short, wide space between anus and anal fin, larvae relatively lightly pigmented, eyes moderately narrow, no enlarged fins. Distinguished from Protomyctophum thompsoni by: lack of postanal ventral melanophores in preflexion larvae and presence of only one spot over the gut in larger larvae
