Order Summary for Percopsiformes

  Main Ref
:
  Order
:
Percopsiformes trout-perches, pirate perches and cavef
  Class
:
Actinopterygii
  Sister Order
:
Lophiiformes 50 M years
  Ref..
:
  First Fossil Record
:
early Tertiary
  Occurs in
:
Marine
Fresh
Brackish
  Remark
:
Premaxilla nonprotractile; ectopterygoid and palatine with teeth; pelvic fins, if present, behind pectorals and with 3-8 soft rays; spines (normally weak) usually present in dorsal fin; many species with ctenoid scales; six branchiostegal rays; 16 branched caudal rays; orbitosphenoid, basiphenoid, and suborbital shelf absent; vertebrae 28-35.
  Classetymology
:
Greek aktis = ray, thunderbolt, beam + Greek pterygion, diminutive of pteryx = wing, fin. Ref. 45335.
  Orderetymology
:
Greek, perké = perch + Greek,opsis = look, appearance + Latin, forma = shape (Ref. 45335).
  Families
:

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

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