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Larvae Information Summary for  Phrynorhombus norvegicus
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Main Ref: Russell, F.S. 1976
Yolk-sac larvae
  max min mod Ref.
Length at birth (mm)     3.27  
Preanal L. % TL     37.8  
Place of development planktonic
Larval area to be filled
Yolk-sac     pigmented Ref:  
Yolk unsegmented Oil globules one oil globuleposteriorventral
Rows on tail no rows
Other melanophores on tail tail partly covered with melanophores
Melanophores on head + trunk melanophores on head + trunk
The most posterior caudal region is free of melanophores. Pigments are concentrated on primordial fin dorsally and posteriorly on anal fin.
Post larvae
Striking feature none
Striking shape lateral short and/or deep dorsal compressed
Striking feature none
Shape of gut spherical or gut loop
Gas bladder   early invisible late invisible
Spinal armature   early no spines late several different spines
Pigmentation early
Rows on tail ventral row
Other melanophores on tail tail partly covered with melanophores
Melanophores on head + trunk melanophores on head + trunk
Pigmentation late
Rows on tail no rows
Other melanophores on tail tail completely covered with melanophores
Melanophores on head + trunk melanophores on head + trunk
Urostyle region   early pigmented late pigmented
Peritoneum covered with melanophores
Pectorals normal with few scattered melanophores
Pelvics normal (i.e. small or absent)  
Denser pigmentation on the right side of the body. There is a continuous row of melanophores along the abdominal contour and the lower jaw. At 8mm, the urostyle is slightly bent upwards.
  L 1st feeding Ref. Months of presence of larvae
max     Jan Feb Mar Apr
min   May Jun Jul Aug
mod 3.58   Sep Oct Nov Dec
Water parameters     Metric characters
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