> Eudora
> Our Universe
> Galaxies
> Individual Galaxies
> Milky Way
> Spiral Arms of the Milky Way
> Orion–Cygnus Arm
> Individual Planetary & Star Systems in the Orion-Cygnus Arm
> Solar System
> Objects in the Solar System
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> Individual Planets in the Solar System
> Earth
> Chronology of Earth
> History of the Earth
> Evolution of Life
> Tree of Life on Earth
> Domains, Species Kingdoms etc.
> Node
> Eukaryota
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> Filozoa
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> Animalia (syn. Metazoa)
> Eumetazoa
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> Node
> Chordata
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> Gnathostomata
> Eugnathostomata
Osteichthyes
Teleostomi. The clade Teleostomi should not be confused with the similar-sounding fish clade Teleostei.
Origins[edit] The origins of the teleostomes are obscure, but their first known fossils are Acanthodians ("spiny sharks") from the Late Ordovician Period. Living teleostomes constitute the clade Euteleostomi, which includes all osteichthyans and tetrapods. Even after the acanthodians perished at the end of the Permian, their euteleostome relatives flourished such that today they comprise 99% of living vertebrate species.
