Heterocheila

Heterocheila
figures 17, 18
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Diptera
Family: Heterocheilidae
McAlpine, 1991
Genus: Heterocheila
Rondani, 1857
Type species
Heteromyza buccata
Fallén, 1820
Species

Heterocheila is a genus of acalyptrate true flies (Diptera). They are placed in their own family, Heterocheilidae, in the superfamily Sciomyzoidea.[1] They are not widely familiar outside entomological circles, but the common name "half-bridge flies" has been associated with them.[2] They are medium-sized flies occurring mainly in temperate regions on seashores of the Northern Hemisphere, where they and their larvae typically feed on stranded kelp in the wrack zone. In this, they resemble kelp flies, which are members of a different family, though the same superfamily.

The family Heterocheilidae was established by McAlpine in 1991.[2] He distinguished it from other families to which Heterocheila had hitherto been referred at various times and by various authorities[3] – Helcomyzidae, Dryomyzidae and Coelopidae.[4]

Description

For terms see Morphology of Diptera

The Heterocheilidae are medium to moderately large (body length 4.2-6.5 mm), fairly robust, brown flies Their postverical bristles are long and often parallel. Three fronto-orbital bristles are seen. The acrostichal bristles are in a single row with a larger prescutellar pair; the metepisternum is bare. The prosternum is triangular, and extended laterally to the propleuron as a narrow, precoxal bridge. The costa is unbroken and the crossveins are unmarked. The midregion of costa lacks anteroventral spines. The apical section of vein M is nearly straight, terminating posterior of wing apex. Crossvein Bm-Cu is almost aligned with vein CuA2. Vein CuA2+A1 reaches the wing margin.

Species

Two species have been described:

  • Heterocheila buccata Rondani, 1857 has a Palearctic distribution in North America and Eurasia.
  • Heterocheila hannai (Cole, 1921)[5] has been reported from the NE USA coast of Alaska, Oregon, and Washington.

The genus name Oedoparea Loew, 1862 is regarded as synonymous.[6]

References

  1. ^ Mathis, Wayne N. World Catalog and Conspectus on the Family Heterocheilidae (Diptera: Schizophora). MYIA, 12:281–289 2011
  2. ^ a b McAlpine, D. K. 1991. Relationships of the genus Heterocheila (Diptera: Sciomyzoidea) with description of a new family. Tijdschr. Ent. 134: 193-199. [1991.12.18] online
  3. ^ McAlpine, D. K. 1998. Chapter 33. Family Heterocheilidae. Manual Palaearct. Dipt. 3: 345-347. [1998.11.30]
  4. ^ "Heterocheilidae [ ]".
  5. ^ Cole, F. R. 1921. Diptera from the Pribilof Islands, Alaska. Proc. Calif. Acad. Sci. (4) 11(14): 169-177. 1921
  6. ^ Loew, H. 1862. Diptera. Ueber die europäischen Helomyzidae und die in Schlesien vorkommenden Arten derselben. Z. Ent. (Breslau) (1859) 13: 1-80


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