A new species of Isocolus from Spain (Hymenoptera, Cynipidae) inducing galls in flower heads of Leuzea conifera (Asteraceae)

5 paginas y 4 figuras[EN] A new species of Isocolus Förster (Hymenoptera, Cynipidae “Aylacini”) is described from Spain: Isocolus leuzeae n. sp.The new species induces galls in flower heads of Leuzea conifera (Asteraceae) and represents the first known aylacin species associated with this plant. The species is closely related to Isocolus lichtensteini (Mayr) that induces galls on stems of Centaurea aspera. Biological data on its life cycle, larva and gall are provided.[FR] Une nouvelle espèce d’Isocolus d’Espagne (Hymenoptera, Cynipidae) produisant des galles dans les akènes de Leuzea conifera (Asteraceae). – Isocolus leuzeae n. sp. (Cynipidae «Aylacini») décrite d’Espagne produit des galles dans les akènes de Leuzea conifera (Asteraceae) ; c´est la première fois que l’on trouve un Aylacini sur cette plante. La nouvelle espèce est très proche d´Isocolus lichtensteini (Mayr) qui produit des galles dans les tiges de Centaurea aspera.We are indebted to José Bedoya for technical assistance with SEM photomicrographs. George Melika provided useful comments on the manuscript. Financial support was partly provided by the Research projects “Fauna Iberica IV”, DGICYT PB95-0235 and REN2002-03518 to J.L. N-A.Peer reviewe