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Larvae Information Summary for  Radiicephalus elongatus
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Main Ref: Charter, S.R. and H.G. Moser 1996
Yolk-sac larvae
  max min mod Ref.
Length at birth (mm) 7.2      
Preanal L. % TL        
Place of development planktonic
Larval area California Current region
Yolk-sac       Ref:  
Yolk   Oil globules  
Rows on tail  
Other melanophores on tail  
Post larvae
Striking feature other
Striking shape lateral normal (not striking) dorsal  
Striking feature other
Shape of gut  
Gas bladder   early   late  
Spinal armature   early   late  
Pigmentation early
Rows on tail dorsal row
Other melanophores on tail one dorso-ventral cluster or band
Melanophores on head + trunk melanophores on head + trunk
Rows on tail no rows
Other melanophores on tail tail partly covered with melanophores
Melanophores on head + trunk melanophores on head + trunk
Pectorals normal melanophores at fin base
Pelvics normal (i.e. small or absent) melanophores at fin base
Total myomeres: 118-131; myomeres in preflexion larvae 63+68, in postflexion-transformation larvae 47-52+66-74, and in juvenile 44-50+74-75;; in preflexion stage, large eye (diameter about 50% HL) and preanal length >60% BL; in postflexion-transformation stage, small eye (about 33% HL) and short preanal length (about 57% BL); slender (BD about 18% BL); elongate pelvic fin girdle; by 17.7 mm, ink sac visible and anal fin developing; by 50.4 mm, tubercles developing ventrally on body and tube in caudal fin region. Pigmentation: Preflexion: anterior to eye; on forebrain; on snout; 5 patches dorsally, opposing dorso-ventral patches at caudal region; 3 patches above gut; 1 patch over pelvic girdle. Postflexion-transformation: scattered on snout; over jaw; on forebrain; laterally on body and pterygiophores (6 dorsal and 3 ventral patches expanded); in caudal region and between caudal fin rays; pectoral fin base; internally above gut; over anus and anteriorly to anal fin. Juvenile: increasing over body and internally on notochord in caudal region. Sequence of fin development: dorsal and pelvics, caudal and anal, pectorals.
Meristic characters
  max min mod Ref.
Total number of myomeres 131 118   36609
  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
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