Abai, MR

6th International Congress of DipterologyA preliminary phylogeny of the horse flies (Diptera:Tabanidae).Morita, S. I.Population Biology Graduate Group, University of California at Davis, California, 95616,USA.Horse-flies (Diptera: Tabanidae) are both vectors of disease and importantpollinators. The monophyly of Tabanidae is supported with molecular andmorphological evidence. However, current phylogenetic hypotheseswithin Tabanidae are based on intuitive classification. Many species ofPangoniinae have proboscides at least as long as their heads, but thelongest are all in the old world genus Philoliche (Wiedemann). These“long-tongues” are used to probe for nectar in deep-throated flowers; forsome flower species, these flies are the only known pollinators. Here Ipresent a phylogenetic hypothesis for the Tabanidae, with an emphasis onPhiloliche, based on molecular data from one nuclear (CAD) and onemitochondrial (COI) gene. Using an exemplar approach, I sampled speciesfrom 8 of 9 tribes in all 3 subfamilies in Tabanidae. I have also sampledall 9 subgenera of Philoliche, and multiple geographic representatives ofthe subgenus P. (Philoliche) in southern Africa. My analysis on the wholesupports Mackerras and Oldroyd’s classifications but does not support themaintenance of three monophyletic subfamilies.Key Words: Tabanidae, Philoliche, phylogeny∗∗∗∗∗∗∗∗∗∗169