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Larvae Information Summary for  Triphoturus nigrescens
( not available )

Main Ref: Moser, H.G. and E.H. Ahlstrom 1996
Yolk-sac larvae
  max min mod Ref.
Length at birth (mm)     2 31442
Preanal L. % TL 64 53    
Place of development planktonic
Larval area Callifornia Current region; Agulhas Current Region
Yolk-sac       Ref:  
Yolk   Oil globules  
Rows on tail  
Other melanophores on tail  
Post larvae
Striking feature light organs
Striking shape lateral normal (not striking) dorsal  
Striking feature light organs
Shape of gut elongated
Gas bladder   early   late  
Spinal armature   early no spines late no spines
Pigmentation early
Rows on tail lateral row
Other melanophores on tail no other melanophores
Melanophores on head + trunk melanophores on head + trunk
Pigmentation late
Rows on tail ventral row
Other melanophores on tail one dorso-ventral cluster or band
Melanophores on head + trunk melanophores on head + trunk
Urostyle region   early unpigmented late unpigmented
Peritoneum with row of melanophores
Pectorals normal melanophores at fin base
Pelvics fin rays only without melanophores
Moderately slender; gut moderate in length, slightly sigmoid; eye slightly elliptical with lunate ventral choroid tissue; lateral midline and ventral finfold pigmentation; photophores form at transformation; caudal luminous glands form in late larvae. Pigmentation: Preflexion: at 3.0-4.5 mm, up to 11 dashes on lateral midline, 1 embedded at pectoral fin base, about 7 embedded ventral median postanal dashes, on margin of ventral finfold, and pair on terminal gut section and laterally on midgut; at 4.5-5.5 mm, 1 in midline at cleithral symphysis, 1 at lower symphysis, midlateral series reduced to 2-6, and postanal series reduced to 2-4. Flexion: pair at midlateral gut; delicate series along bases of anal fin rays; one at anal fin insertion and 1 or 2 on ventral margin of caudal peduncle. Postflexion: vertical series at base of caudal fin rays; by 10 mm, 1 or 2 above caudal peduncle and at adipose fin base. Sequence of fin development: caudal, anal, dorsal, pectorals, pelvics.
Meristic characters
  max min mod Ref.
Total number of vertebrae 35 33   31442
  L 1st feeding Ref. Months of presence of larvae  
max     Jan Feb Mar Apr
min   May Jun Jul Aug
mod     Sep Oct Nov Dec
Similar species 1 2739Triphoturusmexicanus
Remarks
Similar to T. nigrescens but lacks lateral midline pigment.
Water parameters     Metric characters
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