Journal of Entomology1812-56701812-5689Asian Network for Scientific Information10.3923/je.2006.167.179GhajariehHamid BrufordMike Hassan Carlos 2200632The aim of this study was to investigate the taxonomic limits of species within four Eurytomid genera, namely Eurytoma Illiger, Tetramesa Walker, Ahtola Claridge and Sycophila (Walker). In order to further clarify the taxonomic status of the genera, including Tetramesa, Eurytoma, Ahtola and Sycophila, mitochondrial DNA sequence analysis revealed differentiation between the above Eurytomid genera. With the sequence data, the monophyletic status of three of these genera is well supported by all methods of phylogenetic reconstruction. Only Tetramesa, which is by far the most specious taxon studied here, seems polyphyletic, but even in this case, there are certain relationships within the group that are interesting from both a morphological and host preference point of view. For example, T. petiolata (Walker) and T. airae (von Schlechtendal), which are both herbivores of the grass, Deschampsia cespitosa (L.) (Beauv.) group together and two clusters contained all species that use Elymusrepens (L.), i.e., T. linearis (Walker), T. hyalipenis (Walker)and T. cornuta (Walker). Another result of this analysis supports the validity of Ahtola as a separate genus, which was previously uncertain.]]>Al-Barrak, M.S., H.D. Loxdale, C.P. Brookes, H.A. Dawah, D.G. Biron and O. Alsagair,2004Tetramesa (Hymenoptera: Eurytomidae).]]>83509520Aquadro, C.F., N. Kaplan and K.J. Risko,19845423434Avise, J.C., J. Arnold, R.M. Ball, E. Bermingham and T. Lamb et al.,198718489522Bensasson, D., D. Zhang, D.L. Hartl and G.M. Hewitt,200116314321Boucek, Z.,19881988Brown, J.M., O. Pellmyr, J.N. Thompson and R.G. Harrison,199411128141Castro, L.R., A.D. Austin and M. Dowton,20021911001113Claridge, M.F.,196114167185Claridge, M.F. and R.R. Askew,19605141153Claridge, M.F. and H.A. Dawah,19941994pp: 313-329pp: 313-329Chippindale, P.T., D.H. Whitmore, V.K. Dave, T.G. Valencia and J.V. Robinson,199827415424Crozier, R.H., Y.C. Crozier and A.G. Mackinlay,19896399411Danforth, B.N.,199924377393Dawah, H.A.,19861986Dawah, H.A.,198732237245Dawah, H.A.,1988105144148Dawah, H.A., B.A. Hawkins and M.F. Claridge,199564708720Dowton, M. and A.D. Austin,199744398405Fitton, M.G., M.W.R. de V. Graham, Z.R.J. Boucek, N.D.M. Ferguson, T. Huddleston, J. Quinlan and O.W. Richards,1978Gauthier, N., J. LaSalle, D.L.J. Quicke and H.C.J. Godfray,200025521539Harrison, R.G.,19894611Henneicke, K., H.A. Dawah and M.A. Jervis,19922610471087Herre, E.A., C.A. Machado, E. Bermingham, J.D. Nason and M.D. Windsor et al.,199623521530Kjer, K.M.,19954314330Kumar, S., K. Tamura, I.B. Jakobsen and M. Nei,20011712441245Liu, H. and A.T. Beckenbach,199214152Lopez, J.V., M. Culver, J.C. Stephens, W.E. Johnson and S.J. OBrien,199714277286Machado, C.A.,19981998Medina, M. and P.J. Walsh,2000154158Moritz, C.,19943401411Moritz, C., L. Joseph and M. Adams,19932412425Moritz, C., T.E. Dowling and W.M. Brown,198718269292Nardi, F., A. Carpelli, P.P. Fanciulli, R. Dallai and F. Frati,20011812931304Palsboll, J. and P. Arctander,19981998pp: 249-255pp: 249-255Posada, D. and K.A. Crandall,199814817818Simon, C., F. Frati, A. Beckenbach, B. Crespi, H. Liu and P. Flook,199487651701Stauffer, C.,19971997Swofford, D.L.,20001st Edn.,Taberlet, P., S. Griffin, B. Goossens, S. Questiau and V. Manceau et al.,19962431943196Taylor, D.B., R.D. Peterson, A.L. Szalanski and J.J. Peterson,1997Muscidifurax spp. (Hymenoptera: Pteromalidae), paupal parasitoids of filth flies (Diptera).]]>90814824Villablanca, F.X.,19941994pp: 31-58pp: 31-58Weiblen, G.D.,200150243267Willis, L.G., M.L. Winston and B.M. Honda,19921169178Roehrdanz, R.L.,20042004