Family common name: xyelid sawflies
Genus: Xyelecia Ross, 1932
Most phylogenies position Xyelidae as the most primitive family of all Hymenoptera. The xyelids are usually associated with a primitive plant group, coniferous trees (Ross 1932, Blank and Kramp 2017). The Macroxyelinae subfamily, however, is associated with angiosperms, and is likely the most primitive group of extant sawflies in the world (Smith and Schiff 1998).
Xyelidae can be distinguished from other sawfly families by the long ovipositor and a characteristic elongate third antennal segment that is wider than the remaining flagellum. Xyelecia can be distinguished from Xyela and Pleroneura by the vein Sc and the number of antennal segments. It can be distinguished from Macroxyela and Megaxyela by the location of the Sc2/R junction on the fore wing (Ross 1932, Goulet 1992).
Map data from: GBIF.org (26 June 2019) GBIF Occurrence Download Xyelecia
Details about data used for maps can be found here.