Eupareophora

Taxonomy

Family: Tenthredinidae
Family common name: common sawflies
Subfamily: Blennocampinae
Tribe: Blennocampini
Genus: Eupareophora Enslin, 1914
Subgenera: none

Background

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).

Eupareophora is monotypic in North America. Eupareophora parca is about 5.8–6.5 mm in length and entirely black with light-colored striping on the legs and hyaline wings (Smith 1969d).

Diversity

There are two described extant species worldwide. One species occurs in North America (Taeger et al. 2018).

Diagnostic characteristics

Subfamily characters

Genus characters

May be confused with

Eupareophora can be confused with similar species in the subfamily Blennocampinae. It can be distinguished from most other genera by the simple tarsal claw and the deep postocular furrow (Smith 1969d).

Exotic pest species of concern

none

Host associations

In North America, Eupareophora feeds on Fraxinus americana (white ash), Fraxinus nigra (black ash), Fraxinus oregona (Oregon ash), Fraxinus pensylvanicus (green ash), Carya illinoensis (pecan), and Chionanthus (fringe tree) (Smith 1969d).

Life history

Eupareophora parca is commonly known as the spiny ash sawfly and is documented as a pest on ash trees. Large infestations have resulted in noticeable defoliation in urban areas. Females oviposit into the underside of leaflets near the midrib. Larvae are light green and in a late instar have colorful fleshy spines. The mature larvae fall to the ground and overwinter in cells in the soil (Williams 2007).

Distribution

World: This genus is known from North America, and from central and eastern Europe (Taeger et al. 2018).

North America: Eupareophora parca occurs in two ranges in the eastern United States and southeastern Canada, and in coastal California and Oregon (Smith 1969d).

Map data from: GBIF.org (29 October 2019) GBIF Occurrence Download Eupareophora

Details about data used for maps can be found here.

Euparephora parca female lateral habitus; photo by J. Orr, WSDA

Euparephora parca female lateral habitus; photo by J. Orr, WSDA

Eupareophora parca female dorsal habitus; photo by J. Orr, WSDA

Eupareophora parca female dorsal habitus; photo by J. Orr, WSDA