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The subfamily Microdontinae contains slightly more than 400 species of hoverflies and, while diverse, these species share several characteristics by which they differ from other syrphids. The Microdontinae are myrmecophiles, meaning they live in the nests of ants. Larval Microdontinae are scavengers or predators in ant nests, and, in contrast to other syrphid larvae, have no readily apparent body segmentation. Some species also do not exhibit the typical adult flower-visiting behaviour of other hoverflies, but instead remain near their larval host colonies.
Hover flies of the genus Microdon are unusual among the Diptera. Like other members of the subfamily, they are myrmecophiles, meaning they inhabit the nests of ants.
Archimicrodon is a genus of hoverflies. Many of the species in this genus were moved from Microdon by Reemer & Ståhls (2013). Previously, it had been described as having three known species.
Ceratophya is a genus of hoverflies, with five known species. They are distinct from Microdon by the presence of an appendix on vein R4+5. Many species have erroneously been placed in this genus. Some authors place Ceratophya as a subgenus of Microdon.
Furcantenna is a genus of hoverfly from southwestern China, Nepal and Peninsular Malaysia, containing three species. Furcantenna yangi is only known from males. Furcantenna is similar to the genus Schizoceratomyia. The two genera differ from each other in the shape of the scutellum; in Furcantenna a deep medial sulcus in its posterior margin divides the scutellum into two lobes.
Kryptopyga is a genus of hoverfly native to Java, containing two species.
Masarygus is a genus of hoverflies native to Argentina, containing two species. It was first described as representing a new family related to Conopidae or possibly the Oestridae due to its much reduced mouthparts. Larvae are found in ant nests.
Megodon is a subgenus of the hoverfly genus Microdon. It is native to Madagascar, and contains only two known species. Microdon stuckenbergi has an unusual scutellum. Larvae are found in ant nests.
Mixogaster is a genus of hoverflies native to North America and South America, with 21 known species. Mixogaster is distinct by lacking an appendix on vein R4+5, having a reduced and bare metasternum, an unarmed scutellum, and usually an appendix on vein M extending in cell R4+5. Larvae are found in ant nests.
Myiacerapis is a subgenus of the hoverfly genus Microdon. It contains only one species, Microdon villosus. It is native to Uganda, though an undescribed species is known from South Africa. Larvae are found in ant nests.
Omegasyrphus is a genus of hoverflies, with five known species. These are small Microdontinae flies with a distinctive abdominal shape; the second segment is widened, flattened, and flared, with its lateral margin subcircular, thickened, and rounded, and the rest of abdomen narrowed and cylindrical. Larvae are found in ant nests. They are native to southern North America. The genus was previously treated as a subgenus of Microdon.
Paramicrodon is a genus of hoverflies, with eight known species. They differ from Microdon by their short antennae and the lack of appendices on vein R4+5.
Parocyptamus is a genus of hoverflies, with two known species. The critical characteristic is the narrow, elongated abdomen.
Ptilobactrum is a genus of hoverflies, with one known species, Ptilobactrum neavei. They have very broad heads and their basoflagellomeres are elongate and densely pilose in males.
Rhopalosyrphus is a genus of hoverflies, with nine known species. The adults flies mimic wasps, such as Zethus. The larvae are predators of ant brood. They are native to from southern United States to northern Argentina.
Spheginobaccha is a genus of hoverflies, with 15 known species. The genus is readily separated from other microdons by the incomplete metathoracic bridge, round/oval basoflagellomere, occiput with a dorsolateral crease, and other characters.
Ubristes is a genus of hoverflies, with four known species. All are characterized by their metatibiae, which are usually enlarged, but always with a brush of long pile along the dorsal edges. These flies are probably mimics of the stingless bees in the tribe Meliponini.
Surimyia is a genus of hoverflies, with three known species. They are small microdontine flies. Surimyia is the only hoverfly genus with the katatergum lacking microtrichia. In the subfamily Microdontinae, they are distinctive in the absence of pilosity on the postpronotum.
Monoceromyia is a genus of hoverfly. Species in the genus are found in the Afrotropical, Australasian, Neotropical and Oriental regions. They are mimics of wasps and the genus is distinguished by the metapleura being widely separate behind the hind coxae. The elongated frontal base of the antenna is at least as long as the basal segment of the antenna and the second abdominal tergum is longer than wide and constricted.
Metadon is a genus of hoverfly containing 43 species. Most of the species were originally described in the genus Microdon.
References
- 1 2 Cheng, Xin-Yue; Thompson, F. Christian (2008). "A generic conspectus of the Microdontinae (Diptera: Syrphidae) with the description of two new genera from Africa and China" (PDF Adobe Acrobat). Zootaxa. 1879. New Zealand: Magnolia Press: 21–48. doi:10.11646/zootaxa.1879.1.3. ISSN 1175-5334 . Retrieved 2009-09-11.
- 1 2 3 Reemer M, Sankararaman H (2024) Revision of the Oriental species of the hoverfly genus Paramixogaster Brunetti, 1923 (Diptera, Syrphidae, Microdontinae). ZooKeys 1208: 1-48. https://doi.org/10.3897/zookeys.1208.122829