Hemisphaerota cyanea, also known as the palmetto tortoise beetle, is a species in the Chrysomelidae (leaf beetle) family. Beetles in this family are commonly characterized by their small size (usually less than 13 mm), relatively oval and convex shape, variable color but often shining/ iridescent bodies, small heads, and 5-jointed tarsi. Other names include the Florida tortoise beetle and iridescent blue chrysomelid beetle. It is native to the southeastern United States. The specific name (cyanea) means "dark blue", and the beetle earned its name as the palmetto tortoise beetle because it is the only tortoise beetle that feeds on palms.

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