Hippoboscoidea

Definition

A superfamily of calyptrate flies (Diptera: Brachycera) comprising obligate, blood-feeding ectoparasites of mammals and birds. Adults are typically winged or secondarily wingless, with dorsoventrally flattened bodies and powerful claws adapted for clinging to host fur or feathers. The superfamily includes four families: Glossinidae (tsetse flies, vectors of African trypanosomiasis), Hippoboscidae (keds or louse flies), Nycteribiidae, and Streblidae (the latter two being exclusively bat parasites).

Etymology

From Greek híppos (horse) + bóskō (to feed, graze) + -oidea (resembling), originally alluding to the 'horse-feeding' habit of some members.

Example

The sheep ked, Melophagus ovinus (Hippoboscidae), is a wingless hippoboscoid that spends its entire life cycle on its host, unlike its winged relatives such as tsetse flies that temporarily leave hosts to deposit larvae.

Related Terms

• Calyptratae
• Diptera
• Glossinidae
• Hippoboscidae
• Nycteribiidae
• Streblidae
• obligate parasite
• Ectoparasite
• adenotrophic viviparity

Usage Notes

Hippoboscoidea is nested within the Calyptratae (the 'higher' flies), not in the basal Nematocera. The superfamily is distinguished by adenotrophic viviparity—females nourish larvae internally and deposit mature prepupae rather than eggs. Wing reduction has evolved independently multiple times within the group, making wing presence/absence unreliable for family-level identification. The bat-parasitic families Nycteribiidae and Streblidae were historically treated as separate superfamilies but molecular and morphological data support their placement here.