Figure 1

A live specimen of the invasive land flatworm Arthurdendyus triangulatus in a garden in Northern Ireland. Note the presence of a cocoon near the head. Unscaled—specimens typically measure 7–10 cm in length. Photograph by A. K. Murchie.
A live specimen of the invasive land flatworm Arthurdendyus triangulatus in a garden in Northern Ireland. Note the presence of a cocoon near the head. Unscaled—specimens typically measure 7–10 cm in length. Photograph by A. K. Murchie.