Gallery Links
Users Online
· Guests Online: 28

· Members Online: 0

· Total Members: 5,038
· Newest Member: Jerome MARIE
Forum Threads
Newest Threads
· Two aquatic larvae
· Which fly is this ?
· Hybodidae?
· Tabanid from 25.06.2...
· male Odontomyia hydr...
Hottest Threads
· Portraits of amat... [338]
· Fly bubble blowing [172]
· Ariasella lusitan... [105]
· Pinning flies and... [94]
Theme Switcher
Switch to:
Last Seen Users
· John Carr< 5 mins
· actinophrys< 5 mins
· Nikita Vikhrev00:43:56
· evdb01:01:04
· weia01:14:03
· JWV01:30:10
· cavedip02:38:49
· Rupert Huber02:55:11
· alon02:55:44
· Volkmar03:00:07
Latest Photo Additions

Nothomyia calopus (1)

Nemotelus acutirostr...

Ectophasia crassipen...

Andrenosoma cruentum...

Monoceromyia floride...

Forcipomyia (Pterobo...

Hermetia sexmaculata...

Ommatius floridensis...

Pelecorhynchus disti...

Pelecorhynchus disti...
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
Comments
No Comments have been Posted.
Post Comment
Please Login to Post a Comment.
Date and time
26 June 2025 23:35
Login
Username

Password



Not a member yet?
Click here to register.

Forgotten your password?
Request a new one here.
Temporary email?
Due to fact this site has functionality making use of your email address, any registration using a temporary email address will be rejected.

Paul
Donate
Please, help to make
Diptera.info
possible and enable
further improvements!
Latest Articles
· Voltinism in Chaoborus
· Vitaliy Nikolaevich ...
· Mating behaviour and...
· Oviposition into the...
· African Invertebrates
Syrph the Net
Those who want to have access to the Syrph the Net database need to sign the
License Agreement -
Click to Download

Public files of Syrph the Net can be downloaded HERE

Last updated: 25.08.2011
Shoutbox
You must login to post a message.

Tony Irwin
23.06.25 18:10
If you have some spare money, there is a copy (together with keys to pupae and larvae) for sale by Hermann L. Strack, Loguivy Plougras, France

smol
23.06.25 11:18
Appreciate it, Tony Irwin! I got the hint to use the key next to Langton and Pinder key for females of Chironomidae. So no specific queries, except the keys... I will keep this on my list and hope th

Tony Irwin
19.06.25 15:33
I have the hard copy book, if you have any specific queries, but I'm not scanning the 500+ pages!

smol
02.06.25 18:26
Anyone has "Chironomidae of the Holarctic region. Keys and diagnoses. Part 3. Adult Males Entomologica Scandinavica Supplement 34"? smolwaarneming@gma
il.com

Nikita Vikhrev
28.05.25 20:57
I have Russian Coenosia. nikita6510@ya.ru

smol
28.05.25 12:25
Is someone able to share with me "A key to the Russian species of the genus Coenosia"?

Nikita Vikhrev
08.05.25 18:22
I have

rvanderweele
03.05.25 08:35
Does someone has a scan of Nartshuk E.P. 2003. Key to families of Diptera (Insecta) of the fauna of Russian and adjacent countries. Proceedings of the Zoological Institute Vol. 294: 1-252 for me?

Zeegers
10.03.25 18:02
We are looking for a new webmaster https://diptera.in
fo/forum/viewthrea
d.php?thread_id=11
5023&rowstart=20

Zeegers
04.03.25 17:10
Please use the link posted below to remember and honour Paul, if you wish

Render time: 0.12 seconds | 229,227,375 unique visits