Biology and molecular determination of Pachyrhinus lethierryi (Desbrochers, 1875) with description of the mature larva and pupa (Coleoptera, Curculionidae, Entiminae: Polydrusini)

Original range, spreading, life-cycle, egg-laying behaviour, habitat and host plants of Pachyrhinus lethierryi (Desbrochers, 1875) and its larvae were studied. The mature larva and the pupa are described, illustrated and compared to immature life stages of Pachyrhinus mustela (Herbst, 1797) for the first time. In addition to the morphological description, a fragment of the cytochrome oxidase subunit II (COII) was analysed and a diagnostic molecular marker for the identification of Pachyrhinus lethierryi, independent of the developmental stage, was generated