Falcatidae is a family of Paleozoic cartilaginous fish belonging to the order Symmoriiformes.

[1] Members of this family include Falcatus, a small fish from the Bear Gulch Limestone of Montana.

[2] The family first appeared around the start of the Carboniferous, and there is some evidence that they survived well into the early Cretaceous,[3] though its putative Cretaceous members were also argued to be more likely neoselachians.

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