01551nas a2200169   4500008004100000245011100041210006900152300001200221490000800233520098400241100002101225700002101246700002301267700002101290700002301311856004701334       2006                        eng d00aPhylogeny of Chrysotoxum species (Diptera: Syrphidae) inferred from morphological and molecular characters0 aPhylogeny of Chrysotoxum species Diptera Syrphidae inferred from  a459-4670 v1033 aRelationships of nine Italian Chrysotoxum species were analysed using morphological and molecular data. Themorphology-derived cladogram revealed three well-defined groups: (i) C. cautum, (ii) the arcuatum group (C. arcuatum, C. fasciolatum) and (iii) the festivum group (C. festivum – C. vernale, C. bicinctum, C. elegans, C. octomaculatum and C. parmense). Trees inferred from COI-tRNALeu-COII sequences were largely in agreement, but they identified (i) C. parmense as an isolated branch, (ii) C. festivum and C. vernale as separate entities, (iii) C. elegans within a paraphyletic C. festivum clade. ITS2 trees were partially unresolved but C. parmense sequence emerged as a sister to the festivum group. The monophyly of the festivum group derived from morphological data was rejected by a phylogenetic test performed on combined molecular data set. The diagnostic value of some morphological characters commonly used to identify Chrysotoxum species is therefore questioned1 aMasetti, Antonio1 aLuchetti, Andrea1 aSommaggio, Daniele1 aBurgio, Giovanni1 aMantovani, Barbara  uhttps://syrphidae.myspecies.info/node/9316