Tetracneminae can be distinguished from other Encyrtidae by the following features: mesosoma with a distinct prepectus visible laterally; forewing with a reduced marginal vein, often appearing as a short stub; postmarginal vein usually absent or highly reduced; stigmal vein with a distinct stigma; and hind coxae often enlarged or modified. The subfamily is further characterized by a generally compact body form and reduced wing venation compared to other encyrtid subfamilies.

• Coccoidea - parasitoidprimary host group, scale insects
• Hemiptera - parasitoidbroader host range within true bugs

As parasitoids of scale insects and other Hemiptera, Tetracneminae plays a significant role in regulating populations of these plant-feeding insects. This makes them important natural enemies in agricultural and forest ecosystems, particularly in contexts where scale insects reach pest status.

Tetracneminae species have been utilized in classical biological control programs against invasive scale insects. Their effectiveness in suppressing scale populations reduces reliance on chemical pesticides in integrated pest management systems.

• EncyrtinaeOther major subfamily of Encyrtidae; differs in wing venation (more complete marginal vein) and mesosomal structure (prepectus usually concealed or less distinct)
• CopidosominaeEncyrtid subfamily with different host associations (often Lepidoptera eggs or larvae) and typically different body proportions

• BugGuide
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life