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Larvae Information Summary for  Pegusa impar
( not available )

Main Ref: Bertolini, F., U. D'Ancona, E. Padoa Montalenti, S. Ranzi, L. Sanzo, A. Sparta, E. Tortonese and M. Vialli 1956
Yolk-sac larvae
  max min mod Ref.
Length at birth (mm)     2.5  
Preanal L. % TL     52.6  
Place of development planktonic
Larval area to be filled
Yolk-sac spherical   pigmented Ref:  
Yolk segmented Oil globules more than one oil globulepigmented
Rows on tail dorsal + ventral row
Other melanophores on tail tail partly covered with melanophores
Melanophores on head + trunk melanophores on head + trunk
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 pigmented late pigmented
Spinal armature   early no spines late no spines
Pigmentation early
Rows on tail dorsal + lateral + ventral row
Other melanophores on tail tail completely covered with melanophores
Melanophores on head + trunk melanophores on head + trunk
Pigmentation late
Rows on tail dorsal + lateral + ventral row
Other melanophores on tail tail partly covered with melanophores
Melanophores on head + trunk melanophores on head + trunk
Urostyle region   early pigmented late pigmented
Peritoneum covered with melanophores
Pectorals normal  
Pelvics normal (i.e. small or absent)  
At 8 mm: D 79; A 60; C 17-18. Head shape typical of Soleidae, i.e. with upper profile convex and not clearly distinct posteriorly from the visceral sac.
Meristic characters
  max min mod Ref.
Total number of vertebrae 43 42 43  
Preanal number of vertebrae 9 9 9  
  L 1st feeding Ref. Months of presence of larvae
max     Jan Feb Mar Apr
min   May Jun Jul Aug
mod 3.4   Sep Oct Nov Dec
Water parameters     Metric characters
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