The Curtotonidae or quasimodo flies are a small family of small grey to dark brown humpbacked flies (Diptera) with a worldwide distribution, but with very few species in the Nearctic, Australasian/Oceanian, and Palaearctic regions. Most members of the family are found in tropical to subtropical latitudes in Africa and the Neotropics. Many remain undescribed in collections, since little work on the family has been done since the 1930s. Description For terms see Morphology of Diptera Medium-sized flies. The postvertical bristles on head are well developed and cruciate and there are three orbital bristles on head on each side of frons. Arista with long plumosity. Costa with two interruptions one more distal to the humeral crossvein and one before subcosta. Subcosta developed throughout its length up to costa. The posterior basal wing cell and discoidal wing cell are fused. The costa bears spinules. Classification The family has at various times been placed in the Drosophilidae, Diastatidae, and Ephydridae. In 1934 Duda proposed the family name Curtonotidae and nowadays family rank is now widely accepted. Genera and Species Genus Axinota Wulp, 1886 A. kyphosis Kirk-Spriggs, 2010 A. obscuripes Meijere, 1911 A. pictiventris Wulp, 1886 A. rufipes Okada, 1966 A. sarawakensis Delfinado, 1969 A. simulans Delfinado, 1969 Genus Curtonotum Macquart, 1844 C. adusticrus Klymko & Marshall, 2011 C. atlanticum Klymko & Marshall, 2011 C. balachowskyi Tsacas, 1974 C. bivittatum Klymko & Marshall, 2011 C. boeny Tsacas, 1974 C. brunneum Klymko & Marshall, 2011. C. ceylonense Delfinado, 1969 C. coronaeformis Kirk-Spriggs, 2011 C. curtispinum Klymko & Marshall, 2011 C. desperatum Klymko & Marshall, 2011 C. flavisetum Klymko & Marshall, 2011 C. floridense Klymko & Marshall, 2011 C. gladiiformis Kirk-Spriggs, 2011 C. gracile Klymko & Marshall, 2011 C. griveaudi Kirk-Spriggs, 2011 C. hunkingi Klymko & Marshall, 2011 C. irwini Kirk-Spriggs, 2011 C. keiseri Tsacas, 1974 C. nigrum Klymko & Marshall, 2011 C. papillatum Klymko & Marshall, 2011 C. parkeri Kirk-Spriggs, 2011 C. pauliani Tsacas, 1974 C. rinhatinana Kirk-Spriggs, 2011 C. sakalava Tsacas, 1974 C. scambum Klymko & Marshall, 2011 C. sternithrix Tsacas, 1974 C. stuckenbergi Tsacas, 1974 Genus Cyrtona Séguy, 1938 C. albomacula (Curran, 1933) C. capensis Hackman, 1960 C. consobrina Hackman, 1960 C. pictipennis (Thomson 1869) Genus Tigrisomyia Kirk-Spriggs, 2010 T. amnoni Kirk-Spriggs, 2010 T. kinskii Kirk-Spriggs, 2010 T. rhayaderi Kirk-Spriggs, 2010 T. scoliosis Kirk-Spriggs, 2010 Distribution Palaearctic 1 species Nearctic 1 species Australasian/Oceanian 1 species Afrotropical many species Biology Greathead (1958) records the