The Collaborative International Dictionary
Teleostean
Teleostean \Te`le*os"te*an\, a. (Zo["o]l.) Of or pertaining to the teleosts. -- n. A teleostean fish.
Wiktionary
teleostean
n. Any of very many ray-finned fish of the infraclass Teleostei.
Usage examples of "teleostean".
Trilobites and ostracoderms, mostly, with a silvery smattering of teleostean fish, a slimy slither of sea-slugs, and crusty clusters of shelled molluscs and calcichordates.
The case most frequently insisted on by palaeontologists of the apparently sudden appearance of a whole group of species, is that of the teleostean fishes, low down in the Chalk period.