Tetrastichus-revision
Guides
Tetrastichinae
Tetrastichinae is one of the largest subfamilies of Eulophidae, containing over 100 genera and nearly 3,000 species of minute chalcid wasps. Members exhibit exceptionally diverse biology: most are parasitoids attacking hosts across 10 insect orders and over 100 families, including nematodes, mites, and spider eggs. Some species are phytophagous (typically as inquilines in galls), gall formers, or inquilines. Endoparasitism predominates over ectoparasitism, with both solitary and gregarious forms known; gregarious species may produce over 2,000 individuals from a single host. Reproduction is often by thelytokous parthenogenesis, though arrhenotoky occurs in some taxa.