Cassida denticollis

Cassida denticollis, like all species of Cassida has its head covered by the pronotum and wide elytral margins. It measures 5.1–7.0 mm in length, is green in colour with brownish-red areas around the scutellum. It has a distinct tooth at the rear edge of the pronotum, and a series of small, strong, blunt teeth on the front edges of the elytra from which this species derives its name.^[2]

The species feeds on plants from the family Asteraceae, including Achillea millefolium, Artemisia absinthium, Artemisia campestris and various plants Tanacetum species, including Tanacetum corymbosum and Tansy.^[1]