Platygastridae

Classification

Phylum: Arthropoda
Subphylum: Hexapoda
Class: Insecta
Order: Hymenoptera
Superfamily: Platygastroidea
Family: Platygastridae

Pronunciation

How to pronounce Platygastridae: //ˌplætɪˈɡæstriˌdeɪ//

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

Images

Summary

Platygastridae is a diverse family of small parasitoid wasps that primarily target gall midges, serving important ecological roles in pest control.

Physical Characteristics

Small wasps, 1–2 mm in size, usually black and shining; geniculate (elbowed) antennae with an eight-segmented flagellum; wings may lack venation but can have slight fringes of setae.

Identification Tips

Look for very small size, black coloration, and elbowed antennae when identifying Platygastridae wasps.

Habitat

Found in diverse habitats, often associated with plant species that host gall midges (Cecidomyiidae).

Distribution

Widespread distribution; over 4000 species reported, though specific geographic distributions may vary by species.

Diet

Parasitoids of gall midges (Cecidomyiidae) and some may also target beetle or Hemiptera eggs.

Life Cycle

Platygastridae are koinobionts, with the wasp ovipositing in the host's egg or early instar larva. The wasp larva completes development within the host as it reaches the prepupal or pupal stage.

Reproduction

Reproduction involves laying eggs in or on host larvae, primarily targeting gall midges.

Ecosystem Role

As parasitoids, they help control gall midge populations and potentially impact the populations of herbivorous insects they target.

Economic Impact

Some species, like Aphanomerus pusillus, are used in biological control to manage pest populations, such as the pandanus planthopper.

Collecting Methods

Netting
Trapping
Pest surveys

Preservation Methods

Ethanol preservation
Drying
Slide mounting

Evolution

Part of the superfamily Platygastroidea, Platygastridae is one of seven extant families, showing varied evolutionary adaptations, particularly in their reproductive strategies.

Similar Taxa

Misconceptions

They are often confused with other small black wasps; not all small wasps are parasites, nor are all parasitoids harmful to plants.