G. it. Ent., 15 (64): 503-520
March 2019
Note su
Otiorhynchus (Lixorrhynchus) gracilis (Gyllenhal, 1834),
con istituzione del nuovo sottogenere Italorrhynchus
(Coleoptera, Curculionidae, Entiminae)
di
P. MAGRINI
Abstract - Notes on Otiorhynchus (Lixorrhynchus) gracilis (Gyllenhal, 1834), with establishment of the new subgenus Italorrhynchus (Coleoptera, Curculionidae, Entiminae) - In the present note it is highlighted how all the Italian species considered belonging to the subgenus Lixorrhynchus Reitter, 1914 of Otiorhynchus Germar, 1822 are clearly different from the type species of the subgenus, O. (Lixorrhynchus) gracilis (Gyllenhal, 1834). Based on specimens of O. (L.) gracilis from its type locality, the Sainte-Baume massif (Marseilles, France), it is evident that the Italian taxa have different habitus, with narrower and longer elytra [length to width elytral ratio > 1.7; ≤ 1.5 in O. (L.) gracilis], the pronotum with sunken areolas (rather than with clearly prominent tubercles), different aedeagus, with the median lobe parallel-sided in ventral view (rather than tapering towards apexes), spiculum ventrale (8th sternite) differently shaped. Hence, I establish for the Italian “Lixorrhynchus” the new subgenus Italorrhynchus, with Otiorhynchus (Italorrhynchus) latirostris (Bargagli, 1871) as type species. The systematic position of the other, non Italian, taxa at present attributed to Lixorrhynchus needs to be clarified, though I think that most of them belong to the new subgenus.
