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Larvae Information Summary for  Bathylagoides nigrigenys
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Main Ref: Moser, H.G. and E.H. Ahlstrom 1996
Yolk-sac larvae
  max min mod Ref.
Length at birth (mm)     3 35604
Preanal L. % TL        
Place of development planktonic
Larval area California Current region
Yolk-sac elongated   pigmented Ref:  
Yolk segmented Oil globules more than one oil globule
Melanophores on head + trunk melanophores on trunk
Pigmentation: coalescing ventrally into 8-10 pairs dorsolateral to gut, from above pectoral fin base to anus; cluster above and below notochord tip.
Post larvae
Striking feature none
Striking shape lateral normal (not striking) dorsal  
Striking feature none
Shape of gut tube-like
Gas bladder   early   late  
Spinal armature   early no spines late no spines
Early migration of dorsal pigment; complex and unique pigment pattern; voluminous and rugose foregut; more pairs of ventrolateral pigment (8-10) than in B. wesethi (6-8); ventral notochord tip pigment versus dorsal and ventral in B. wesethi; optic lobe pigment; trunk series sparser and more irregular than in B. wesethi; fewer total vertebrae than in B. wesethi (41-45 vs. 43-47). Pigmentation: Early preflexion: 8-11 pairs dorsolateral to gut; on ventral surface of each optic lobe; 1 at ventral notochord tip; at cleithral symphysis; on branchiostegal membrane; postorbital; on snout. Mid- and late preflexion: on upper and lower jaw; on ventrolateral margin of head; ventral notochord patch over hypural region and base of caudal fin rays; irregular hypaxial series begins; peppering on ventral finfold and adjacent area; on inner and lateral surface of pectoral fin base; 1 or more on postanal ventral midline; patch at cleithral symphysis. Flexion: up to 12 dorsolaterally on gut; 1 or more above brain; on dorsal finfold. Postflexion: irregular epaxial series; laterally on hindbrain; dorsally on peduncle. Sequence of fin development: caudal, anal, dorsal, pectorals and pelvics.
  L 1st feeding Ref. Months of presence of larvae
max     Jan Feb Mar Apr
min   May Jun Jul Aug
mod     Sep Oct Nov Dec
Water parameters     Metric characters
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