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Myctophiformes - Myctophidae

Loweina rara (Dwarf Lanternfish)

Illustration Meristics Life History ELH Descr. Distribution Footnotes
More information for this taxon at: LarvalBase | FishBase | Univ. Washington Data

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): <2.82
Preanal Length (%SL): 55 increasing with development to 80
Flexion Length (in mm SL): 8 - 11
Length at Transformation (in mm SL): >20
Fin Development Sequence: Pectorals, caudal, anal and 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: mouth, crown, dorsal gut, dorsal finfold, pectoral fin, dorsal, ventral, mediolateral,
Flexion: mouth, crown, nape, isthmus, dorsal gut, dorsal finfold, anal finfold, pectoral fin, mediolateral,
Postflexion: cheek, dorsal gut, dorsal finfold, anal finfold, pectoral fin, dorsal, ventral,
Juvenile: mouth, crown, nape, cheek, isthmus, dorsal gut, lateral gut, ventral gut, dorsal, ventral, mediolateral, caudal,
Pigment Diagnostics: Distinguished from Tarletonbeania crenularis by: band on head between eyes in preflexion and flexion larvae. Distinguished from all other myctophids (except T. crenularis) by: dorsal and ventral finfolds conspicuously pigmented, elongated lower pectoral-fin ray pigmented on spatulations
Diagnostic Characters: See myctophid photophore figure. Among largest myctophid larvae at transformation (>20.0 mm SL), early larvae slender but relative body depth doubles in later stages, only Br2 develops during larval period, deep furrow in dorsal longitudinal septum in postflexion larvae2, opposing melanophores on caudal peduncle3. Distinguished from all other myctophids except Tarletonbeania crenularis by: enlarged finfolds. Distinguished from T. crenularis by: eye moderately narrow with no choroid tissue on ventral surface of eye, pigment band on head between eyes


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last updated: August 2019