Terminasteridae is a family of fossil starfish which lived from the Jurassic to Cretaceous periods.

It was erected in 2011 as a monotypic group to contain only the type genus Terminaster (which it is named after).

[1] A second genus, Alkaidia, was originally described as a member of the extant family Benthopectinidae, but was transferred to Terminasteridae in 2020.

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