Pergidae

Taxonomy

Superfamily: Tenthrediniodea
Family: Pergidae
Family common name: pergid sawflies
Subfamilies: Acordulecerinae, Conocoxinae, Euryinae, Loboceratinae, Parasyzygoniinae, Perginae, Pergulinae, Perreyiinae, Philomastiginae, Phylacteophaginae, Pterygophorinae, Pteryperginae, Styracotechyinae, Syzygoniinae

Background

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).

Diversity

Pergidae includes 60 genera and 442 species worldwide. A single genus and 13 species are Nearctic in distribution (Taeger et al. 2018).

North American genera

Acordulecera

Diagnostic characteristics

Host associations

In North America, Pergidae feed on plants of the families Juglandaceae and Fagaceae (Smith and Middlekauff 1987).

May be confused with

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).

Life history

Pergidae in North America are external leaf feeders that skeletonize leaves (Smith and Middlekauff 1987).

Distribution

World: Pergidae is most diverse in the Southern Hemisphere and occurs in North America, Australia, New Guinea, and South America (Goulet 1992).

North America: Acordulecera occurs in Canada, the United States, the Caribbean Islands, and Central America (Smith 2006a).

Acordulecera dorsalis female lateral habitus; photo by J. Orr, WSDA

Acordulecera dorsalis female lateral habitus; photo by J. Orr, WSDA

Acordulecera dorsalis male lateral habitus; photo by J. Orr, WSDA

Acordulecera dorsalis male lateral habitus; photo by J. Orr, WSDA