Carpophiline-ID: An interactive matrix-based key to the carpophiline sap beetles (Coleoptera, Nitidulidae) of Eastern North America

<p>We present Carpophiline-ID, a matrix-based Lucid^TM key, for the adult stage of the known species of Carpophilinae (<em>Coleoptera: Nitidulidae</em>) of North America, east of the Mississippi River. We provide an overview of the features and technical specifications used to build the key. The list of terminal taxa used in the key represents the most current regional account for Carpophilinae, a beetle subfamily of agricultural and ecological importance. We discuss the value of matrix-based, free access keys for the identification of difficult taxa.</p>