Tachydromiinae

Tribe Guides

Tachydromiinae is a of Hybotidae (Diptera) comprising small predatory flies. Members are generally 1–2 mm in length and exhibit fast-running on vegetation and other surfaces. The subfamily is globally distributed with notable disjunct patterns, including found in both southern Africa and Central Asia. Three tribes are recognized: Symballophthalmini, Drapetini, and Tachydromiini.

Platypalpus by (c) Katja Schulz, some rights reserved (CC BY). Used under a CC-BY license.

Platypalpus by (c) carnifex, some rights reserved (CC BY), uploaded by carnifex. Used under a CC-BY license.

Platypalpus by (c) Owen Strickland, some rights reserved (CC BY), uploaded by Owen Strickland. Used under a CC-BY license.

Pronunciation

How to pronounce Tachydromiinae: //ˌtækɪˈdroʊmi.aɪniː//

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Identification

Tachydromiinae can be distinguished from other Empidoidea by small body size (typically 1–2 mm) and characteristic wing venation patterns. Within the , Drapetini exhibit distinctive features such as without ommatrichia and specific wing configurations (e.g., vein M1 anteriorly arched and parallel to R4+5 in some ). Female Drapetidini show modified abdominal structure where tergite 10 appears reduced or to and/or sternite 10.

Images

Habitat

Diverse terrestrial including leaf surfaces, tree trunks, stones, and sandy substrates. Some inhabit specialized environments: Andean-related habitats, eastern South American biomes (cerrado, Caatinga, Pantanal, Atlantic Forest), and mangrove .

Distribution

Widespread globally. Documented from South Africa (Northern Cape Province), Turkmenistan, Iran (Hormozgan Province), Singapore, Inner Mongolia (China), and throughout South America including Andean regions and eastern Brazil. Some exhibit unusual disjunct distributions between southern Africa and Central Asia.

Diet

Predatory.

Behavior

exhibit fast-running habits on vegetation, tree trunks, stones, and other surfaces.

Ecological Role

Predatory flies, likely functioning as of small arthropods in terrestrial .

Similar Taxa

Other EmpidoideaTachydromiinae distinguished by small size, specific wing venation patterns, and running rather than aerial typical of some related groups.
Other Hybotidae subfamiliesTachydromiinae separated by tribal-level characters including structure, wing venation, and female abdominal .

More Details

Tribal classification

Three tribes recognized: Symballophthalmini ( Symballophthalmus), Drapetini (multiple genera including Crossopalpus, Drapetis, Elaphropeza, Stilpon), and Tachydromiini (genera including Tachydromia, Platypalpus, Tachypeza).

Fossil record

Extinct documented from Cretaceous and Cenomanian amber deposits including Taimyr Amber (Santonian, Cenomanian), Canadian amber (Campanian), Burmese amber (Cenomanian), Baltic amber (Eocene), and Oise amber (Ypresian).