Order Summary for Myxiniformes

  Main Ref
:
  Order
:
Myxiniformes hagfishes
  Class
:
Myxini
  Sister Order
:
Petromyzontiformes 600 M years
  Ref.
:
  First Fossil Record
:
early Cambrian
  Occurs in
:
Marine
Fresh
Brackish
  Remark
:
One semicrircular canal; single olfactory capsule with few folds in sensory epithelium, and olfactory nerves with separate bundles; no bone; eye musculature absent; 1-16 pairs of external gill openings; adenohypophysis with undifferentiated cellular elements, not divided into distinct regions; body naked and eel-like; no paired fins; no trace of lateral line system in adults, neuromasts absent.
  Class etymology
:
Greek myxinos = a fish of slime, derived from Greek myxo = mucus, slime; Linnaeus, 1846. Ref. 45335.
  Order etymology
:
Greek, myxinos = a fish of slime, derived from Greek myxo = mucus, slime; Linné; 1846 + Latin, forma = shape (Ref. 45335).
  Families
:
( n = 1 ) -
Myxinidae

Ref.
[ e.g. 9948]                       
Glossary
                    [ e.g. cephalopods]

Converted to PHP by Kit 06.10.09