Family common name: common sawflies
Genus: Monardis Enslin, 1914
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).
Monardis is monotypic in North America. The female Monardis pulla is medium-sized, about 6.5 mm in length, and entirely black with light-colored striping on the legs and darkened wings. The male for this species is not known (Smith 1969d).
Monardis can be confused with similar species in the subfamily Blennocampinae. It can be distinguished from most other genera by the simple tarsal claw, presence of hind wing cell M, and absence of a postocular furrow (Smith 1969d).
Monardis plana, known as the rose bud sawfly, is a minor pest of roses in Europe. The larvae hollow out the immature buds and bore into the stems of the host and feed on the young leaves, resulting in reduced bloom (Scheibelreiter 1972, Gibbs 2006). One documented host, Rosa canina (dog rose), is also present growing wild in North America (Pavek and Skinner 2013).
World: This genus is known from North America, Central and Eastern Europe, Uzbekistan, China, and Japan (Taeger et al. 2018).
Map data from: GBIF.org (29 October 2019) GBIF Occurrence Download Monardis and the Smithsonian National Museum of Natural History Entomology Collection (USNM)
Details about data used for maps can be found here.