Betelgeusia is an extinct genus of sea stars in the family Radiasteridae.

It was described by Blake and Reid, in 1998,[1] and existed in what is now the Netherlands, Texas, United States, Morocco, and India, during the Middle Jurassic through the Cretaceous period.

[2] It contains the species B. brezinai, B. exposita, B. riedi, and B.

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