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Larvae Information Summary for  Pomatoschistus norvegicus
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Main Ref: Russell, F.S. 1976
Yolk-sac larvae
  max min mod Ref.
Length at birth (mm)        
Preanal L. % TL        
Place of development  
Larval area to be filled
Yolk-sac       Ref:  
Yolk   Oil globules  
Rows on tail  
Other melanophores on tail  
Post larvae
Striking feature none
Striking shape lateral normal (not striking) dorsal normal (not striking)
Striking feature none
Shape of gut elongated
Gas bladder   early pigmented late pigmented
Spinal armature   early no spines late no spines
Pigmentation early
Rows on tail ventral 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 no other melanophores
Melanophores on head + trunk melanophores on head + trunk
Urostyle region   early pigmented late pigmented
Peritoneum without melanophores
Pectorals normal  
Pelvics with elongated fin rays  
One melanophore on the angle of the jaw, none on the head, and a few on the throat and below the alimentary canal. At 14 mm, one melanophore on the region of the otolith. At 16 mm, appearance of notochordal melanophore.
Meristic characters
  max min mod Ref.
Total number of vertebrae 33 30 32 37
  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
Entered by: Papasissi,Christine - 19.10.90
Modified by: Reyes,Rodolfo B. - 06.10.94
Checked by: Giovanardi,Otello - 15.02.91
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