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Larvae Information Summary for  Macropinna microstoma
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Main Ref: Moser, H.G. 1996
Yolk-sac larvae
  max min mod Ref.
Length at birth (mm)        
Preanal L. % TL        
Place of development planktonic
Larval area Northeastern Pacific (California Current region); Northwestern Pacific (Japan)
Yolk-sac       Ref:  
Yolk   Oil globules  
Rows on tail  
Other melanophores on tail  
Post larvae
Striking feature other
Striking shape lateral other dorsal compressed
Striking feature other
Shape of gut elongated
Gas bladder   early   late  
Spinal armature   early no spines late no spines
Pigmentation early
Rows on tail no rows
Other melanophores on tail two dorso-ventral clusters or bands
Melanophores on head + trunk melanophores on head + trunk
Pigmentation late
Rows on tail no rows
Other melanophores on tail two dorso-ventral clusters or bands
Melanophores on head + trunk melanophores on head + trunk
Urostyle region   early pigmented late pigmented
Peritoneum covered with melanophores
Pectorals normal melanophores at fin base
Pelvics with elongated fin rays melanophores at fin base
Deeper body and shorter gut than B. exilis and D. longipes; large head with pronounced hump or bend at nape; tubular eyes directed dorsally; anus slightly posterior to midbody; pelvic fin origin anterior to midbody; paired fins large, pelvic fin rays elongate; series on hypaxial myomeres and later on epaxial myomeres; hypural blotch; lower vertebral count (34-37) compared to other genera in region. Pigmentation: Flexion: streak extending posteriad from angle of lower jaw; along cleithra; midventrally at liver; internally dorsal to liver; heavy blotch in pelvic fin base, extending dorsad over myomeres and ventrad over gut; median hypural blotch; two lower hypural blotches; series of diagonal streaks on hypaxial myomeres; dorsally on terminal section of gut. Postflexion: series of epaxial myomeres increases posteriad, complete at transformation. Transformation: gut enclosed in black sheath; on pectoral fin and pelvic fin rays. Sequence of fin development: caudal and pectoral and pelvic, dorsal and anal. Sequence of fin development: caudal, pectorals and pelvics; dorsal and anal.
Meristic characters
  max min mod Ref.
Total number of myomeres 37 34   265
  L 1st feeding Ref. Months of presence of larvae    Ref. 
max     Jan Feb Mar Apr
min   May Jun Jul Aug
mod     Sep Oct Nov Dec
Water parameters     Metric characters
Entered by: Luna,Susan M. - 01.02.00
Modified by: Luna,Susan M. - 07.01.03
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