Order Summary for Gadiformes

  Main Ref
:
  Order
:
Gadiformes cods
  Class
:
Actinopterygii
  Sister Order
:
Batrachoidiformes 20 M years
  Ref.
:
  First Fossil Record
:
middle Tertiary
  Occurs in
:
Marine
Fresh
Brackish
  Remark
:
Pelvic fins, when present, inserted below or in front of pectorals (thoracic or jugular, rarely behind in Macrouridae) with up to 11 rays; no true spines in the fins; most with long dorsal and anal fins; scales usually cycloid, rarely ctenoid; premaxilla forms the entire margin of upper jaw, protractile in some; ectopterygoid toothless; orbitosphenoid and basisphenoid absent; branchiostegal rays 6-8; posterior vertebral reduction results in posterior dorsal and anal pterygiophores exceeding the number of caudal vertebrae; swim bladder without pneumatic duct (the swim bladder is absent in Melanonus and Squalogadus).
  Class etymology
:
Greek aktis = ray, thunderbolt, beam + Greek pterygion, diminutive of pteryx = wing, fin. Ref. 45335.
  Order etymology
:
Latin gadus = cod, 1889 + Latin, forma = shape (Ref. 45335).
  Families
:

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

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