Family common name: pergid sawflies
Subfamilies: Acordulecerinae, Conocoxinae, Euryinae, Loboceratinae, Parasyzygoniinae, Perginae, Pergulinae, Perreyiinae, Philomastiginae, Phylacteophaginae, Pterygophorinae, Pteryperginae, Styracotechyinae, Syzygoniinae
The family Pergidae is common and diverse in Australia and South America (Smith and Middlekauff 1987). The family includes several subfamilies, but only one genus is represented in North America: Acordulecera. Adults are easily recognized by a small-medium body size, about 3–10 mm, and the 3-segmented flagellum (Goulet 1992). Acordulecera feed on deciduous tree species and are generally not of economic importance (Smith and Middlekauff 1987).
In North America, Pergidae feed on plants of the families Juglandaceae and Fagaceae (Smith and Middlekauff 1987).
Sawflies in this family are similar in form to families in the superfamily Tenthredinoidea: Diprionidae, Argidae, and Tenthredinidae. Pergidae can be distinguished by the number of antennal segments (Goulet 1992).
Pergidae in North America are external leaf feeders that skeletonize leaves (Smith and Middlekauff 1987).
World: Pergidae is most diverse in the Southern Hemisphere and occurs in North America, Australia, New Guinea, and South America (Goulet 1992).