calypter noun - a small membranous flap at the base of the hind edge of the wing in some flies; it covers the halteres. Also called the alula, though an alula is only a calypter if it covers the haltere.

Calyptratae (singular Calyptrata) are a group of flies (diptera) that have calypters.

Photos showing calypters:

See Also

wing

haltere

alula

Print References

Gordh, p. 157 (1)

Works Cited

1.	A Dictionary of Entomology By George Gordh, David H. Headrick

Contributed by Chuck Entz on 31 May, 2007 - 2:14am
Additional contributions by cotinis, Tony-2
Last updated 21 September, 2008 - 9:20pm

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