Stem Sawflies

Cephidae

Classification

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

Pronunciation

How to pronounce Cephidae: //ˈsɛfɪdiː//

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

Images

Calameuta middlekauffi by the Smithsonian. Used under a CC0 license.

Janus quercusae by the Smithsonian. Used under a CC0 license.

Cephus graenicheri by the Smithsonian. Used under a CC0 license.

Summary

Cephidae, commonly known as stem sawflies, is a family in the order Hymenoptera. They possess unique morphological features, particularly in their pronotum and fore wings. The family contains numerous species, which can be serious pests in agricultural settings.

Physical Characteristics

Mostly black with some light-colored markings. Clubbed antennae. Slender, laterally compressed body with elongated pronotum. Metanotum without cenchrus.

Identification Tips

Pronotum in lateral view sloping forward at about 45°, and in dorsal view with a weakly concave posterior margin. Fore wing with the posterior-most vein (2A) straight and parallel to the posterior margin.

Habitat

Larvae bore in stems of grasses (including grain crops) and shrubs (including berries, roses, and willows).

Distribution

Transcontinental, found in a range of habitats where host plants are available.

Diet

Larvae are herbivorous, feeding on the stems of grasses and shrubs.

Life Cycle

Life cycle involves larval stages that bore into stems of host plants, leading to potential damage.

Reproduction

Specific details on reproductive methods are not provided; generally, females lay eggs within host plants for larvae to feed on after hatching.

Ecosystem Role

Herbivorous larvae play a role in the plant ecosystem, but some species are considered pests.

Economic Impact

Some species, such as wheat stem sawflies, are serious pests affecting agriculture, particularly grain crops.