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Larvae Information Summary for  Ichthyomyzon fossor
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Main Ref: Renaud, C.B. 2011
Yolk-sac larvae
  max min mod Ref.
Length at birth (mm)        
Preanal L. % TL        
Place of development  
Larval area Global
Yolk-sac       Ref:  
Yolk   Oil globules  
Post larvae
Striking feature  
Striking shape lateral   dorsal  
Striking feature  
Shape of gut  
Gas bladder   early   late  
Spinal armature   early   late  
Ammocoetes: Max. size attained should be at least 182 mm TL judging by the size of the metamorphosing ammocoetes. Body proportions, as percentage of TL (based on 73 specimens measuring 68-167 mm TL): prebranchial length, 6.3-9.6; branchial length, 9.9-13.4; trunk length, 48.3-55.6; tail length, 24.0?31.9. Trunk myomeres, 48-53. Extent of pigmentation (- = absence to trace; + = 1% to under 25%; ++ = 25% to under 75%; +++ = 75% or more): upper lip, ++ (77% of specimens) or +++ (23%); subocular, + (22), ++ (74%) or +++ (4%); upper branchial, ++ (8%) or +++ (92%); lower branchial - (100%); caudal fin, + (30%), ++ (67%) or +++ (3%). Lateral line neuromasts unpigmented. Caudal fin shape, rounded. Metamorphosing ammocoetes: 84-182 mm TL.
  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: Hilomen,Teresa - 25.10.13
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