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More Information about: sexual dimorphism
Term sexual dimorphism
Explanation The systematic morphological difference between individuals of different sex in the same species.
This difference usually does not relate to the parts of the postabdomen, where male and female genitalia are always different. Often the differences between the sexes are not very great, for example, the distance between the compound eyes is different between male and female flies inmany groups (e.g., touching eyes in males of most Syrphidae, always separate in females); several midge groups have males with strongly plumose antennae while females have almost bare antennae.
Very striking differences may be in groups where males have developed seconday sexual characters, like ornamentation of legs (e.g., in many Dolichopodidae), head (e.g., some Tephritidae) or antennae (e.g., also in some Dolichipodidae); or in groups where females have developed characters to assist in choosing a mate (e.g., penate legs in Empididae) or specialised structures for oviposition (e.g., in Conopidae). In some extreme cases, mainly due to the life habits of species, the male and female may hardly resemble each other because one sex has a different life habit than the other (one sex living underground most of its life or on a certain host, the other free living). This may result in loss of wings and/or atrophiation of certain body parts in one of the sexes.
Category Morphology: general terms
Submitted by Paul beuk
Date Added/
Modified		 29.04.10
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20 March 2025 23:23
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Zeegers
10.03.25 18:02
We are looking for a new webmaster https://diptera.in
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Zeegers
04.03.25 17:10
Please use the link posted below to remember and honour Paul, if you wish

Zeegers
04.03.25 17:09
I propose in respect to him not to post on trivial matters until his cremation, March 8th

Zeegers
04.03.25 17:08
For those unaware: Paul, the owner, past away two days ago. https://diptera.in
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rafael_carbonell
19.12.24 12:33
Received missing pages from @royensoc.co.uk, free download available for a few days: https://we.tl/t-vk
a2lFLsYU

rafael_carbonell
17.12.24 23:03
Downloaded the British Handbook Diptera: Bibionid and Scatopsidae flies but pages 58, 59, 67, 68 are missing. Anybody has a complete copy?

Zeegers
08.11.24 16:10
Www.abebooks.com

Gnats2meetu
29.07.24 13:19
Don't suppose anyone knows anwhere selling a copy of Contributions to a Manual of Palaearctic Diptera 2? Always wanted a copy.... Smile

Paul Beuk
16.07.24 11:37
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Jan Willem
11.07.24 12:59
Following up on the update provided by Paul on the donations received in 2024, I just made a donation. Follow my example Wink

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