Behavior and Chemical Ecology in Phoridae (Diptera): A Systematic Review of Parasitoid-Host Interactions.

Phorid flies are a highly diverse group that exhibits multiple parasitic strategies involving ants, bees, and other invertebrates. Although comprehensive reviews are limited, most studies emphasize parasitoid-host interactions, especially within Apocephalus, known as "decapitating flies" because their larvae develop inside ant heads. Some species, such as Pseudohypocera kerteszi (Enderlein, 1912), are economically important due to their negative effects on stingless bee colonies. Chemical ecology plays an important role in understanding these interactions, as compounds like cuticular hydrocarbons and mandibular secretions function as semiochemicals guiding host recognition and influencing parasite behavior. However, studies addressing chemical mechanisms remain relatively limited. This review systematically synthesizes data on parasite-host interactions in Phoridae, integrating behavioral and chemical perspectives. We also conducted an ecological network analysis at the genus level to identify functional roles and interaction patterns among phorids and their hosts. The results highlight a predominance of parasitoid interactions and a strong focus on ant-associated systems, which may reflect research bias. Overall, our findings contribute to a better understanding of the ecological strategies and community-level implications of parasitism in this diverse and behaviorally complex fly family, while also highlighting gaps in current knowledge.