Acordulecera

Taxonomy

Family: Pergidae
Family common name: pergid sawflies
Subfamily: Acordulecerinae
Genus: Acordulecera Say, 1836
Subgenera: none

Background

Pergidae are a diverse, mostly tropical family. Only one genus of this large family, Acordulecera, is endemic to North America north of Mexico (Goulet 1992).

Acordulecera is a speciose genus of small sawflies. They are stout and generally 4 mm or less in length. As larvae, they feed on broadleaf deciduous trees. This genus is not well-studied, and several species remain undescribed (Smith 2006a, Smith 2010).

Diversity

There are 55 described species worldwide restricted to the Western Hemisphere, with the greatest species richness in tropical South America. Nine species occur in North America (Smith 2006a, Smith 2010, Taeger et al. 2010).

A preliminary key to species of North American Acordulecera is included in Smith 2010.

Diagnostic characteristics

May be confused with

The Pergidae can be distinguished from other families by the fused tergum, the lack of fore wing vein 2r, and the lack of hind wing cell A. The family can be distinguished from Argidae by of the number of antennal segments. Acordulecera is easy to recognize with its small size and 6-segmented antennae (Goulet 1992).

Exotic pest species of concern

none

Host associations

Hosts of the eastern species of Acordulecera include Quercus (oak), Castanea (chestnut), Carya (hickory), and Juglans (walnut) (Smith 2006a, Smith 2010).

Life history

Larvae are caterpillar-like, external leaf feeders. The biology of this genus is not well described (Smith 1993).

Distribution

World: All species of Acordulecera occur in the Americas, as far south as Bolivia and Brazil in South America (Smith 2006a, Taeger et al. 2010).

North America: In the northern part of its range, Acordulecera occurs as far north as southeastern Canada through the eastern United States and west to Arizona and California. The genus is also found throughout Mexico and Central America, and Dominica, Montserrat, and St. Vincent in the Caribbean (Smith 2006a, Smith 2010).

Map data from: GBIF.org (26 June 2019) GBIF Occurrence Download Acordulecera

Details about data used for maps can be found here.

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

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

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

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

Acordulecera dorsalis female face; photo by J. Orr, WSDA

Acordulecera dorsalis female face; 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

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

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

Acordulecera dorsalis male face; photo by J. Orr, WSDA

Acordulecera dorsalis male face; photo by J. Orr, WSDA

Acordulecera dorsalis wings; photo by J. Orr, WSDA

Acordulecera dorsalis wings; photo by J. Orr, WSDA

Acordulecera grisselli antenna; photo by J. Orr, WSDA

Acordulecera grisselli antenna; photo by J. Orr, WSDA