Leaf-Miner Beetle

Octotoma marginicollis

Octotoma marginicollis Photo © by Mike Plagens

This beetle was photographed while resting after chewing on a leaf of Cocklebur (Xanthium strumarium). Camp Verde, Yavapai Co., Arizona on 24 Aug 2019.

Chrysomelidae -- Leaf Beetle Family

Three species of these shiny, knobby flattened leaf beetles in the genus Octotoma are found in North America. All are quite small, barely 3 mm in length; this small size and the flattened profile are related to the larval stage which is spent tunneling within a leaf between the tough, upper and lower epidermis. The host plant of this one is reported to be Acourtia in the Asteraceae.

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Copyright Michael J. Plagens, page created 20 Sept. 2019.