browse words by letter
a b c d e f g h i j k l m n o p q r s t u v w x y z
ganoidei

more about ganoidei

ganoidei


  2  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Ganoidei  \Ga*noi"de*i\,  n.  pl  [NL.  See  {Ganoid}.]  (Zo["o]l.) 
  One  of  the  subclasses  of  fishes.  They  have  an  arterial  cone 
  and  bulb,  spiral  intestinal  valve,  and  the  optic  nerves 
  united  by  a  chiasma.  Many  of  the  species  are  covered  with 
  bony  plates,  or  with  ganoid  scales;  others  have  cycloid 
  scales. 
 
  Note:  They  were  numerous,  and  some  of  them  of  large  size,  in 
  early  geological  periods;  but  they  are  represented  by 
  comparatively  few  living  species,  most  of  which  inhabit 
  fresh  waters,  as  the  bowfin,  gar  pike,  bichir, 
  Ceratodus,  paddle  fish,  and  sturgeon. 
 
  From  WordNet  r  1.6  [wn]: 
 
  Ganoidei 
  n  :  a  group  of  mostly  extinct  primitive  bony  fishes 
  characterized  by  armor-like  bony  scales  [syn:  {Ganoidei}, 
  {order  Ganoidei}] 




more about ganoidei