Megaspilidae

Definition

A small family of minute parasitoid wasps (Hymenoptera: Ceraphronoidea) comprising approximately 450 described species in 13 genera and two subfamilies, with many additional species remaining undescribed. Most megaspilids are believed to be primary parasitoids of other insects, while a minority function as hyperparasitoids. A notable proportion of species are wingless and soil-dwelling, reflecting adaptation to fossorial habitats. The family is poorly studied relative to other parasitoid groups, and its biology remains incompletely known for most taxa.

Etymology

From Greek megas (large, great) + spilos (spot, mark), referring to distinctive integumental markings in the type genus Megaspilus.

Example

The wingless, soil-inhabiting megaspilid Dendrocerus is often encountered in litter samples and is suspected to parasitize dipteran puparia.

Related Terms

• Ceraphronidae
• Ceraphronoidea
• Parasitoid
• hyperparasitoid
• Apterous
• Edaphic

Usage Notes

Megaspilidae is treated as a family within the superfamily Ceraphronoidea, sister to Ceraphronidae. The group is frequently overlooked in biodiversity surveys due to small body size (often <2 mm) and cryptic habits. Winglessness and reduced eyes in many species reflect convergent adaptation to soil microhabitats, not phylogenetic affinity with other apterous Hymenoptera such as Diapriidae or Platygastridae. Identification to genus or species typically requires slide-mounting and microscopic examination.