Order Summary for Salmoniformes

  Main Ref
:
  Order
:
Salmoniformes salmons
  Class
:
Actinopterygii
  Sister Order
:
Esociformes 110 M years
  Ref..
:
  First Fossil Record
:
middle Cretaceous
  Occurs in
:
Marine
Fresh
Brackish
  Remark
:
Deep posterior myodome with eye musculature passing through and attaching to trunk muscles; adipose fin present; mesocoracoid present; gill membranes extending far forward, free from isthmus; pelvic axillary process present; last three vertebrae turned up; 11-210 pyloric caeca; 7-20 branchiostegal rays; vertebrae 50-75; tetraploid karyotype; parr marks in young of most species. Maximum length up to 1.5 m. This order has high value in sport and commercial fisheries.
  Classetymology
:
Greek aktis = ray, thunderbolt, beam + Greek pterygion, diminutive of pteryx = wing, fin. Ref. 45335.
  Orderetymology
:
Latin, salmo = salmon, 1884 + Latin, forma = shape (Ref. 45335).
  Families
:
( n = 1 ) -
Salmonidae