Diastatidae

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Ecdysozoa
Cladus: Panarthropoda
Phylum: Arthropoda
Subphylum: Hexapoda
Classis: Insecta
Cladus: Dicondylia
Subclassis: Pterygota
Cladus: Metapterygota
Infraclassis: Neoptera
Cladus: Eumetabola
Cladus: Endopterygota
Superordo: Panorpida
Cladus: Antliophora
Ordo: Diptera
Subordo: Brachycera
Infraordo: Muscomorpha
Sectio: Schizophora
Subsectio: Acalyptrata
Superfamilia: Ephydroidea

Familia:Diastatidae
Genera (4): Campichoeta – Diastata – Euthychaeta – †Pareuthychaeta
Name

Diastatidae Hendel, 1917
References

Mathis, N. M. & Barraclough D. A. 2011. World Catalog and Conspectus on the Family Diastatidae (Diptera: Schizophora). Myia 12: 235–266. Full article (PDF) Reference page.

Links

BHL bibliography
Hassler, M. {{{1}}}. Diastatidae. World Plants: Synonymic Checklists of the Vascular Plants of the World In: Roskovh, Y., Abucay, L., Orrell, T., Nicolson, D., Bailly, N., Kirk, P., Bourgoin, T., DeWalt, R.E., Decock, W., De Wever, A., Nieukerken, E. van, Zarucchi, J. & Penev, L., eds. {{{1}}}. Species 2000 & ITIS Catalogue of Life. Published online. Accessed: {{{1}}} {{{2}}} {{{3}}}. Reference page.
Diastatidae – Taxon details on Encyclopedia of Life (EOL).
Global Biodiversity Information Facility. 2019. GBIF Backbone Taxonomy. Checklist dataset. Taxon: Diastatidae.
ION

Diastatidae are a family of flies, and are in the order Diptera. They occur primarily in the Holarctic Region, but several species are known from the Oriental, Neotropical, and Australasian regions. Members of the family number over 20 described species in three genera. There is an additional fossil genus.[1]

Description

For terms see Morphology of Diptera

Minute flies with grey or brown-grey body and, usually, maculate wings. The postvertical bristles on head are cruciate and vibrissae are present on the head are present. The front orbital bristles are inset and upswept. The costa is interrupted near the end of Radial vein 1 and sometimes also near the humeral crossvein. The subcosta is incomplete fusing with Radial vein 1 before the apex. The posterior basal wing cell and discoidal wing cell are separate. The anal cell of wing and the anal vein of wing are both present.
Biology

Adults of living forms have been found along margins of bogs, marshes, and the edges of moist woodlands. Immature biologies are largely unknown. Hennig wrote about it thought to be Campichoeta punctum.
Genera

Diastatinae
Diastata Meigen, 1830
Campichoetinae
Campichoeta Macquart, 1835 (sometimes treated as a separate family Campichoetidae)
Euthychaeta Loew, 1864
†Pareuthychaeta Hennig 1965

Identification

Duda, O. (1934), Ephydridae. 6, 1, 58e, 1-18.In: Lindner, E. (Ed.). Die Fliegen der Paläarktischen Region 6: 1–115. Keys to Palaearctic species but now needs revision (in German).
A.A. Shtakel 'berg Family Diastatidae in Bei-Bienko, G. Ya, 1988 Keys to the insects of the European Part of the USSR Volume 5 (Diptera) Part 2 English edition. Keys to Palaearctic species but now needs revision .

Phylogeny

Ephydroidea      Curtonotidae        Drosophilidae+Camillidae        Ephydridae      Diastatidae sensu lato	Ephydroidea        Curtonotidae+Drosophilidae          Campichoetidae        Ephydridae+Camillidae      Diastatidae
McAlpine (1989)[2]	Grimaldi (1990)[3]

Other

Diastatidae were once considered by some to be Ephydridae.
References

Papp, T. (1984). "Diastatidae". In Árpád Soós, Papp T. (ed.). Catalogue of Palaearctic Diptera (print). Vol. 10. Amsterdam: Elservier. pp. 182–185. ISBN 0-444-99601-X.
McAlpine, J.F. 1989. Chapter 116. Phylogeny and classification of the Muscomorpha. In Manual of Nearctic Diptera. Vol. 3. Coordinated by J.F. McAlpine and D.M. Wood. Agriculture Canada Monograph, 32. pp. 1397–1518.

David Grimald, 1990 A phylogenetic, revised classification of genera in the Drosophilidae (Diptera) Bulletin of American Museum of Natural History 1971-139 [1]

Wayne N. Mathis & David A. Barraclough Contributions to a Manual of Palaearctic Diptera. 3: 523-530. Science Herald, Budapest World Catalog and Conspectus on the Family Diastatidae (Diptera: Schizophora) Myia, 12:235–266 online here