Conifer Sawflies

Diprionidae

Classification

Phylum: Arthropoda
Subphylum: Hexapoda
Class: Insecta
Order: Hymenoptera
Family: Diprionidae

Pronunciation

How to pronounce Diprionidae: //daɪˈpɹiːənaɪdiː//

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

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Summary

Diprionidae, or conifer sawflies, are a small family of conifer-feeding sawflies restricted to the Northern Hemisphere, causing significant ecological damage to coniferous forests during outbreaks.

Physical Characteristics

6-12 mm in length; mesonotum not divided by a transverse groove between bases of fore wings; protibia with 2 apical spurs; fore wing without longitudinal vein Sc; metatibia with 1 preapical spur or none; pronotum with posterior margin strongly concave; tergum 1 not extending to metacoxa; antennae with 13 or more segments; males with pectinate antennae, females with serrated antennae.

Identification Tips

Look for the distinctive dual structure of the protibia and the antennae variations between male and female; and the concave pronotum.

Habitat

Common in coniferous forests, particularly in areas of North America; relatively rare in the Midwest.

Distribution

Most commonly found throughout Northern America; found worldwide with about 140 species across 13 genera.

Diet

Larvae feed primarily on conifers, which can lead to significant damage to these trees.

Life Cycle

Life stages include egg, larva (caterpillar), pupa, and adult; larvae are often gregarious.

Reproduction

Details on reproduction are not specified, but likely involve egg-laying on or near host conifers.

Ecosystem Role

Can significantly affect the health and ecological balance of forests due to their feeding habits on conifers.

Economic Impact

Diprionidae can be major forest pests, which may impact forestry and ecological management due to their potential for outbreaks.

Misconceptions

Some may confuse them with other Symphyta that also feed on conifers.