Order Summary for Pristiophoriformes

  Main Ref
:
  Order
:
Pristiophoriformes saw sharks
  Class
:
Elasmobranchii
  Sister Order
:
Pristiformes 145 M years
  Ref..
:
  First Fossil Record
:
late Jurassic
  Occurs in
:
Marine
Fresh
Brackish
  Remark
:
Body sharklike; snout produced in a long flat blade with teeth on each side (teeth unequal in size, usually alternating large and small, and weakly embedded); one pair of long barbels; no dorsal fin spines (sometimes present as internal rudiments); anal fin absent; spiracles large. Maximum length 1.4 m.
  Classetymology
:
Greek eulanein, elasmos = metal beaten out + Greek brangchia = gills. Ref. 45335.
  Orderetymology
:
Greek, pristis, -eos = a kind of shark + Latin ferre = to carry + Latin, forma = shape (Ref. 45335).
  Families
:
( n = 1 ) -
Pristiophoridae