1) Class 2) Subclass teleostei 
Teleostei is one of three infraclasses in class Actinopterygii, the ray-finned fishes. This diverse group, which arose in the Triassic period, includes 26,840 extant species in about 40 orders and 448 families; most living fishes are members of this group. The other two infraclasses, Holostei and Chondrostei, may be paraphyletic. ==Characteristics...
• (n. pl.) A subclass of fishes including all the ordinary bony fishes as distinguished from the ganoids.
Te`le·os'te·i noun plural [ New Latin , from Greek ... complete + ... bone.] (Zoology) A subclass of fishes including all the ordinary bony fishes as distinguished from the ganoids. 
Teleostei is a large sub-class of fish distinguished by a bony skeleton.
[n] - large diverse group of bony fishes
subclass Teleostei noun large diverse group of bony fishes; includes most living species