The Acalyptratae or Acalyptrata are a subsection of the Schizophora, which are a section of the order Diptera, the "true flies". In various contexts the Acalyptratae also are referred to informally as the acalyptrate muscoids, or acalyptrates, as opposed to the Calyptratae. All forms of the name refer to the lack of calypters in the members of this subsection of flies. An alternative name, Acalypterae is current, though in minority usage. It was first used by Justin Pierre Marie Macquart in 1835 for a section of his tribe Muscides; he used it to refer to all acalyptrates plus scathophagids and phorids, but excluding Conopidae.
Leander (Franz) Czerny was an Austrian entomologist mainly interested in Diptera.
The Tanypezidae, known as the “stretched-foot flies”, are small family of acalyptrate Diptera. The 28 species are found mostly in the New World, divided between two genera: Tanypeza is found in North America, with the type species extending into the Palaearctic, and Neotanypeza is neotropical in distribution and includes one species known only from Dominican amber from 17–20 million years ago, N. dominicana Lonsdale & Apigian. This distribution contrasts that of its sister family, the Strongylophthalmyiidae, which is mostly East Asian in distribution.
The Neriidae are a family of true flies (Diptera) closely related to the Micropezidae. Some species are known as cactus flies, while others have been called banana stalk flies and the family was earlier treated as subfamily of the Micropezidae which are often called stilt-legged flies. Neriids differ from micropezids in having no significant reduction of the fore legs. Neriids breed in rotting vegetation, such as decaying tree bark or rotting fruit. About 100 species are placed in 19 genera. Neriidae are found mainly in tropical regions, but two North American genera occur, each with one species, and one species of Telostylinus occurs in temperate regions of eastern Australia.
Metopochetus is a genus of stilt-legged flies. Crus is a subgenus. Species within Metopochetus are:
The Cypselosomatidae are a family of true flies (Diptera) closely related to the Micropezidae. Eleven living genera and one fossil genus are described, 8 of which are in the subfamily Pseudopomyzinae; this group was formerly ranked as a family, but they have been treated as a subfamily of Cypselosomatidae since 2007. Some species are believed to be associated with bat guano.
Anaeropsis is a genus of stilt-legged fly. It is found in New Guinea.
The family Nothybidae contains only the genus Nothybus, a group of colorful and elongated flies. The family has been recently revised.
Calobata petronella is a species of fly in the family Micropezidae. It is found in the Palearctic.
Cardiacephala is a genus of flies in the family Micropezidae.
Plocoscelus podagricus is a species of flies in the family Micropezidae. It is found in Brazil and Peru.
Rainieria calceata is a species of stilt-legged flies belonging to the family Micropezidae.
Taeniaptera trivittata is a species of stilt-legged flies in the family Micropezidae.
Taeniaptera is a genus of stilt-legged flies in the family Micropezidae. There are at least 3 described species in Taeniaptera.
Taeniapterinae is a subfamily of flies in the family Micropezidae. There are at least 9 described species in Taeniapterinae.
Micropeza corrigiolata is a species of stilt-legged flies in the family Micropezidae.
Calobatina is a genus of stilt-legged flies in the family Micropezidae. There are at least two described species in Calobatina.
Micropeza stigmatica is a species of stilt-legged flies in the family Micropezidae.
Taeniaptera lasciva is a species of stilt-legged fly in the family Micropezidae.
