Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada

Family Pergidae - Pergid Sawflies

caterpillars on hickory leaf - Acordulecera Sawfly - Acordulecera Sawfly? - Acordulecera hymen - Acordulecera Acordulecera Pergid Sawflies Genus Acordulecera - Acordulecera Sawfly Larva sp. - Acordulecera Fly feeding on aphids - Acordulecera
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hymenoptera (Ants, Bees, Wasps and Sawflies)
No Taxon ("Symphyta" - Sawflies, Horntails, and Wood Wasps)
Family Pergidae (Pergid Sawflies)
~10 spp. in a single genus in our area(1); worldwide, the third largest symphytan family, with ~440 spp. in 60 genera(2)(3)
Mesonotum not divided by a transverse groove between bases of fore wings. Protibia with 2 apical spurs, the smaller spur at least half as long as larger spur. Fore wing without longitudinal vein Sc; at most a short vein Sc1 dividing costal cell. Metatibia with 1 preapical spur or none. Pronotum in dorsal view with posterior margin strongly concave. Tergum 1 extending to metacoxa and fused with metapleuron (in pale specimens, area of fusion darker and not to be confused as a division between sclerites). Mesoscutellar appendage fused to mesoscutellum. Protibia with dorsal spur usually simple. Antenna with 4-23 flagellomeres, fore wing in specimens of most genera without closed anal cell, base of vein 2A&3A absent, and hind wing without closed anal and medial cells.
Gondwanan distribution, with the majority of spp. in S. America and Australia (none in Africa) and feeble holarctic representation; almost 2/3 of the spp. are in the New World(2)
food plant diversity exceeds that found in any other sawfly family(2)