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Nielsen, J.G., D.M. Cohen, D.F. Markle and C.R. Robins, 1999

Ophidiiformes cusk eels

Actinopterygii

Gadiformes 20 M years

Carroll, R., 1988  |  Helfman, G., B. Collette and D. Facey, 1997

middle Tertiary

Marine

Fresh

Brackish

Pelvic fins when present, inserted at level of preopercle or farther anterior (mental or jugular), zero to two soft rays in each, and occasionally with a spine; base of dorsal and anal fins long, extending to and usually joined with caudal fin; nostrils paired on each side; dorsal and anal fin pterygiophores more numerous than adjacent vertebrae (the ratio being about 1.8:1).

Greek aktis = ray, thunderbolt, beam + Greek pterygion, diminutive of pteryx = wing, fin. Ref. 45335.

Greek, ophis = serpent + Latin, forma = shape (Ref. 45335).

( n = 5 ) -
Aphyonidae Bythitidae Carapidae Ophidiidae Parabrotulidae

Ref.
[ e.g. 9948]                       

Glossary
                    [ e.g. cephalopods]