Pamphiliidae (sometimes incorrectly spelled Pamphilidae) is a small wasp family within Symphyta, containing some 200 species from the temperate regions of North America and Eurasia. The larvae feed on plants (often conifers), using silk to build webs or tents, or to roll leaves into tubes in which they feed, thus earning them the common names leaf-rolling sawflies or web-spinning sawflies. Some species are gregarious and the larvae live in large groups. Fossils of Pamphiliidae have been dated to the Jurassic period. They are distinguished from the closely related Megalodontesidae by their simple, filiform antennae. Taxonomy The family is currently divided into three subfamilies based on phylogenetic analysis of both extant and extinct species. Cephalciinae Benson, 1945 Acantholyda Costa, 1894 Caenolyda Konow, 1897 Cephalcia Panzer, 1805 Chinolyda Beneš, 1968 Juralydinae †Atocus Scudder, 1892 †Juralyda Rasnitsyn, 1977 Neurotoma Konow, 1897 †Scabolyda Wang et al, 2014 †Tapholyda Rasnitsyn, 1983 Pamphiliinae Cameron, 1890 Chrysolyda Shinohara, 2002 Kelidoptera Konow, 1897 Onycholyda Takeuchi, 1938 Pamphilius Latreille, 1802 Pseudocephaleia Zirngiebl, 1937 Incertae sedis †Ulteramus Archibald & Rasnitsyn, 2015 References Borror, D. J., DeLong, D. M., Triplehorn, C. A.(1976) cuarta edición. An introduction to the study of insects. Holt, Rinehart and Winston. New York, Chicago. External links Bugguide.net. Family Pamphiliidae - Webspinning and Leafrolling Sawflies Sawfly families