Family common name: common sawflies
Genus: Zaschizonyx 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 Tenthredininae subfamily are relatively large compared to others in the family, often with distinct colorful markings. Some are wasp-like with black and yellow stripes (Goulet 1992). Many species’ life histories are not known. Some Tenthredininae species feed uniquely, as adults, on flower pollen and other insects (Smith 1993). They can be distinguished from other subfamilies by wing venation (Goulet 1992).
Zaschizonyx can be confused with similar species in the subfamily Tenthredininae. It can be distinguished from most other genera by the angle on the posteroventral area of the metepimeron, and from closely related Filacus by the widely notched clypeus (Goulet 1992).
Zaschizonyx montana feeds on Symphoricarpos (snowberry) (Goulet 1992).
World: This genus is known from North America (Taeger et al. 2010).
North America: Zaschizonyx montana is widespread in North America, with collections in Ontario, Texas, and the Pacific coast (BugGuide 2019).
Map data from: GBIF.org (29 October 2019) GBIF Occurrence Download Zaschizonyx, the Smithsonian National Museum of Natural History Entomology Collection (USNM) and the Oregon State Arthropod Collection (OSAC)
Details about data used for maps can be found here.