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anaspid

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anaspid


  1  definition  found 
 
  From  WordNet  r  1.6  [wn]: 
 
  anaspid 
  n  :  extinct  small  freshwater  jawless  fish  usually  having  a 
  heterocercal  tail  and  an  armored  head;  of  the  Silurian 
  and  Devonian 




more about anaspid