How many living holostean genera remain?

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holostean Living and fossil forms of Holostei.

There are only three living genera of holosteans remaining today.1

These survivors are divided between two groups:
* The bowfins, represented by the single genus Amia.1
* The gars, represented by the two genera Lepisosteus and Atractosteus.1

While holosteans were highly abundant during the Mesozoic Era, they are now considered a group of primitive bony fishes with limited extant diversity.1