Temporal range: Late Silurian - Recent
Osteichthyes are a taxonomic superclass of fish, also called bony fish, that includes the ray-finned fish (Actinopterygii) and lobe finned fish (Sarcopterygii). The split between these two classes occurred around 440 million of years. The Osteichthyes are paraphyletic with land vertebrates. This is why some classification schemes put the tetrapods into the Osteichthyes. Osteichthyes are the most various group of vertebrates, consisting of over 29,000 species, making them the largest class of vertebrates in existence today.