Diptera.info :: Identification queries :: Diptera (adults)
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 Gender of Acroceridae
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| colinleb |
Posted on 05-08-2021 16:05
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Member Location: Posts: 181 Joined: 16.03.11 |
Acrocera orbiculus. Taken as half of what appeared to be a pair in copula. Back at the ranch I cannot distinguish between them. Should I be able to see an obvious external difference in the terminalia? Do both sexes have holoptic eyes? Isolated elder bush on Bedfordshire, UK chalk. 29 July 2021.
colinleb attached the following image:  [270.63Kb] Edited by colinleb on 05-08-2021 16:13 |
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| Zeegers |
Posted on 05-08-2021 16:24
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Member Location: Soest, NL Posts: 18739 Joined: 21.07.04 |
In Acrocera, it is dead simple scutellum yellow -> male scutellum black ->. female wait for the forthcoming fieldguide to flies with three pulvilli (yours truely & Andre Schulten) Theo |
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| colinleb |
Posted on 05-08-2021 17:01
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Member Location: Posts: 181 Joined: 16.03.11 |
Thank you Theo. In that case both individuals are male. Apparent mating just the result of over-readiness I guess. |
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| Zeegers |
Posted on 06-08-2021 08:44
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Member Location: Soest, NL Posts: 18739 Joined: 21.07.04 |
So can also check the genitalia, but is tricky. Female have long cerci, often taken for male genitalia. Most Acroceridae are sexed vice versa ! If you have both genders, it should be obvious. But if you do not, this is of little help Theo |
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| Zeegers |
Posted on 06-08-2021 08:46
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Member Location: Soest, NL Posts: 18739 Joined: 21.07.04 |
https://www.researchgate.net/publication/331954794_Evolution_of_fossil_and_living_spider_flies_based_on_morphological_and_molecular_data_Diptera_Acroceridae/figures?lo=1 |
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| colinleb |
Posted on 06-08-2021 16:12
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Member Location: Posts: 181 Joined: 16.03.11 |
Thanks again Theo. |
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