Belongs within: Oestridae.
The Gasterophilinae include the stomach bot flies, with larvae that are parasitic on the mouth, tongue and stomach lining of large mammals. Eggs are laid on the host’s hair and enter the host when it licks itself. Long-term effects on the host are usually slight except in cases of severe infestation. Species of the genus Gasterophilus are parasites on Equidae. Platycobboldia loxodontis and Rodhainomyia roverei infest elephants whereas Gyrostigma species attack rhinoceroses (Askew 1971).
Characters (from Colless & McAlpine 1991, as Gasterophilidae): Proboscis vestigial, subcranial cavity much reduced. R1 without setulae; M1+2 almost straight, ending in wing margin; lower calypter vestigial. Prosternum not prominent.
<==Gasterophilinae |--Platycobboldia Townsend 1934A71, F92 | `--P. loxodontisA71 |--Rodhainomyia Bequart 1920A71, F92 | `--R. rovereiA71 |--Gyrostigma Brauer 1884A71, F92 | |--G. conjugensA71 | |--G. pavesiiA71 | `--G. sumatrensisA71 `--Gasterophilus Leach 1817F92 |--G. intestinalis (De Geer 1776)P10, F92 [=Oestrus intestinalisF92; incl. O. equi Clark 1797F92, *Gasterophilus equiF92] |--G. haemorrhoidalis (Linnaeus 1758)F92 |--G. inermis (Brauer 1858) [=Gastrus inermis]F92 |--G. nasalis (Linnaeus 1758) [=Oestrus nasalis; incl. O. veterinus Clark 1797]F92 |--G. nigricornis (Löw 1863) [=Gastrus nigricornis]F92 |--G. pecorum (Fabricius 1794) [=Oestrus pecorum]F92 `--G. ternicinctusP10
*Type species of generic name indicated
References
[A71] Askew, R. R. 1971. Parasitic Insects. Heinemann Educational Books: London.
[F92] Fan Z. 1992. Key to the Common Flies of China 2nd ed. Science Press: Beijing.
[P10] Pape, T. 2010. Oestridae (bot flies). In: Brown, B. V., A. Borkent, J. M. Cumming, D. M. Wood, N. E. Woodley & M. A. Zumbado (eds) Manual of Central American Diptera vol. 2 pp. 1305–1311. NRC Research Press: Ottawa.