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Order Summary for Gadiformes
Main Ref.:	Nelson, J.S., 1994
Order:	Gadiformes    cods
Class:	Actinopterygii (ray-finned fishes)
Sister Order:	Batrachoidiformes     20 M years
Ref.:	Carroll, R., 1988     Helfman, G., B. Collette and D. Facey, 1997
First fossil record:	middle Tertiary       middle Miocene
Occurs in:	Marine      Freshwater      Brackish
Remarks:	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:	10 Bregmacerotidae , Euclichthyidae , Gadidae , Lotidae , Macrouridae , Melanonidae , Merlucciidae , Moridae , Muraenolepididae , Phycidae

Identification keys | Tree of Life

Ref.:   ( e.g. 9948)
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Page created by: Eli, 17.10.00, last modified by Eli, 15.02.05.