Planogyra astericus, common name the eastern flat-whorl, is a species of small air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Valloniidae.

This species is listed as of "Special Concern" in the U.S. state of Michigan.

• "Planogyra asteriscus (morse)" (PDF). Michigan Natural Features Inventory. Archived from the original (PDF) on 2009-01-05. Retrieved 2008-09-19.