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Larvae Information Summary for  Ichthyomyzon castaneus
( not available )

Main Ref: Fuiman, L.A. 1982
Yolk-sac larvae
  max min mod Ref.
Length at birth (mm)        
Preanal L. % TL        
Place of development  
Larval area North America (Great Lakes)
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  
Dorsal fin often slightly indented but never with a deep notch to the trunk (> 40 mm).ยนยบ (Ref.42876). Ammocoetes: Max. size 165 mm TL. Body proportions, as percentage of TL (based on 22 specimens measuring 75-165 mm TL): prebranchial length, 6.4-8.3; branchial length, 8.9-12.4; trunk length, 52.0-56.6; tail length, 25.0-30.3. Trunk myomeres, 50-56. Extent of pigmentation (- = absence to trace; + = 1% to under 25%; ++ = 25% to under 75%; +++ = 75% or more): upper lip, ++ (50% of specimens) or +++ (50%); subocular, + (4%), ++ (77%) or +++ (18%); upper branchial, +++ (100%); caudal fin, ++ (96%) or +++ (4%). Lateral line neuromasts darkly pigmented at least by 94 mm TL. Caudal fin shape, rounded. Metamorphosing ammocoetes: 94-165 mm TL (Ref. 89241).
  L 1st feeding Ref. Months of presence of larvae
max     Jan Feb Mar Apr
min   May Jun Jul Aug
mod     Sep Oct Nov Dec
Similar species 1 2519Ichthyomyzonunicuspis
Remarks
Natural hybrids with I. castaneus (Ref. 42876).
Water parameters     Metric characters
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