Family common name: common sawflies
Genus: Monophadnoides Ashmead, 1898
The Tenthredinidae are the most species-rich family and are found throughout the world, in all continents but Antarctica. They are known as the “common sawflies.” They can generally be recognized by a cylindrical body and long, segmented antennae. Otherwise, they come in a variety of colors, sizes, and forms (Goulet 1992).
Sawflies in the subfamily Blennocampinae have a diverse set of life histories and habits. Many species are restricted to subtropical and tropical regions, but the genus is still fairly species-rich in North America. Blennocampinae includes many sawflies that feed on ornamental and forestry crops. This subfamily can be recognized by wing venation and bidentate mandibles (Smith 1969d).
The monograph for Blennocampinae (Smith 1969d) synonymizes Monophadnoides and Claremontia. The two genera have since been separated, and the only Nearctic species to remain in Monophadnoides is M. rubi (Taeger et al. 2010, Smith pers. comm. 2020).
Monophadnoides can be confused with similar species in the subfamily Blennocampinae. It can be distinguished from Periclista by the fore wing veins 2A and 3A and by a lack of membranous area on the anepimeron, from Monophadnus by the lack of a divide on the katepimeron, and from Claremontia by the relative length of the third and fourth antennal segments and the lack of a tarsal claw basal lobe (Smith 1969d). Claremontia is also characterized by a postocular furrow which is not present in Monophadnoides (Smith 2015).
Monophadnoides rubi is commonly known as the raspberry sawfly because of its notoriety as a pest on raspberry plants. Females oviposit into the tissue of the leaves. Emerged larvae feed on the underside of the leaf, making small round holes. As the larvae mature, they feed on the entire leaf. Larvae are light green in color with several fleshy spines. At maturity, they fall to the ground and overwinter in the soil (Vaughan and Rosenstiel 1949).
North America: Monophadnoides rubi occurs throughout the United States, as far south as Texas and Georgia, and in southern Canada (Smith 1969d).
Map data from: GBIF.org (29 October 2019) GBIF Occurrence Download Monophadnoides
Details about data used for maps can be found here.