Diptera.info :: Identification queries :: Diptera (adults)
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 the most crazy fly I've seen so far! Acroceridae - Cyrtus gibbus
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| jorgemotalmeida |
Posted on 15-06-2007 19:42
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 Member Location: Viseu - PORTUGAL Posts: 9295 Joined: 05.06.06 |
Hi * locality - Silgueiros - Viseu - PORTUGAL * date - 2007.06.15 * size - 7 mm (medium fly) * habitat - openland, near river - near Quercus sp. above dry and burnt (?) Rubus sp. * substrate - hovering with other acrocerid. This fly was an amazing thing to see!!! It is breathtaking to see this fly at the first time. In dorsal view... we cannot see the head.  It has a proboscis among the legs! All proboscis is yellow but at the extremity is a little dark. Legs are not totally yellow. Third segment in antenna very short with apical hair , so Cyrtinae. Inside this we have 5 possible genus: Cyrtus, Opsebius, Paracrocera, Acrocera y Ogcodes -- the last is totally black. The others have small proboscis, but Cyrtus has long proboscis as you can see. So probably Cyrtus. There is Cyrtus gibbus for Portugal, but the legs ARE NOT totally yellow. Neither can be C. pusillus because probosci is not totally black. My spanish friend Gallego helped me with biblio but we don?t have the descriptions for other possible species... One thing is sure: this fly amazes me totally!!  EDIT ---> Title changed from "the most crazy fly I've seen so far! Acroceridae - Cyrtus sp. which one??" to "the most crazy fly I've seen so far! Acroceridae - Cyrtus gibbus" jorgemotalmeida attached the following image:  [189.58Kb] Edited by jorgemotalmeida on 20-06-2007 09:04 |
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| jorgemotalmeida |
Posted on 15-06-2007 19:43
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Member Location: Viseu - PORTUGAL Posts: 9295 Joined: 05.06.06 |
full body
jorgemotalmeida attached the following image:  [191.98Kb] |
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| jorgemotalmeida |
Posted on 15-06-2007 19:43
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Member Location: Viseu - PORTUGAL Posts: 9295 Joined: 05.06.06 |
other view
jorgemotalmeida attached the following image:  [191.9Kb] |
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| jorgemotalmeida |
Posted on 15-06-2007 19:44
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Member Location: Viseu - PORTUGAL Posts: 9295 Joined: 05.06.06 |
other...
jorgemotalmeida attached the following image:  [194.89Kb] |
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| jorgemotalmeida |
Posted on 15-06-2007 19:45
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Member Location: Viseu - PORTUGAL Posts: 9295 Joined: 05.06.06 |
assisting. and, yes, it is alive!!! impressive. 
jorgemotalmeida attached the following image:  [183.72Kb] Edited by jorgemotalmeida on 15-06-2007 19:49 |
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| jorgemotalmeida |
Posted on 15-06-2007 19:46
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Member Location: Viseu - PORTUGAL Posts: 9295 Joined: 05.06.06 |
it looks like a wasp!!  This fly is spiders' parasitoid. Under flies I spotted Thanatus cf. vulgaris/atratus (Philodromidae) , and some Pardosa sp. and Hogna radiata (both Lycosidae) wandering around. But it seems that acrocerids.. "apparently have no fixed host-parasitoid relationships at the species level". And attacks spiders that make web? (not sure about this. But lycosids and philodromids don?t build web. ) Edited by jorgemotalmeida on 15-06-2007 20:13 |
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| Nikita Vikhrev |
Posted on 15-06-2007 20:33
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 Member Location: Moscow, Russia Posts: 9347 Joined: 24.05.05 |
Congratulations, Jorge!
Nikita Vikhrev - Zool Museum of Moscow University |
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| Jan Zwaaneveld |
Posted on 15-06-2007 20:48
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Member Location: Leerdam, Netherlands Posts: 721 Joined: 20.02.06 |
Amazing creature, Jorge! I can't wait till I find one myself...
http://slamenietd...web-log.nl |
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| caliprobola |
Posted on 15-06-2007 20:54
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Member Location: Belgium Posts: 203 Joined: 24.05.07 |
i guess this is why i look at flies (see http://www.diptera.info/forum/viewthread.php?forum_id=16&thread_id=6851 ) you can find the most amazing living creatures under flies. nice pics! |
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| fleabag |
Posted on 15-06-2007 21:01
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 Member Location: Sussex UK Posts: 183 Joined: 13.07.06 |
hehe ..what a freak
Edited by fleabag on 15-06-2007 21:02 |
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| conopid |
Posted on 15-06-2007 21:03
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 Member Location: United Kingdom Posts: 1039 Joined: 02.07.04 |
What an incredible looking fly. I have always wanted to find an Acrocerid, and now I want to find one even more!
Nigel Jones, Shrewsbury, United Kingdom |
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| Tony Irwin |
Posted on 15-06-2007 21:19
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 Member Location: Norwich, England Posts: 7236 Joined: 19.11.04 |
I think you win "Fly of the month", Jorge
Tony ---------- Tony Irwin |
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| crex |
Posted on 15-06-2007 21:28
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 Member Location: Sweden Posts: 1996 Joined: 22.05.06 |
OMG, what a weird looking creature, but that unusual body form probably fill a purpose. I'm not sure we have Acroceridae here up in the north ... Nice find Jorge! |
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| jorgemotalmeida |
Posted on 15-06-2007 23:57
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Member Location: Viseu - PORTUGAL Posts: 9295 Joined: 05.06.06 |
I found this fly in this zone: http://tinyurl.com/227zf6 (near that rectangular building, about 20 m to the right - not in the shadow zone neither under the dense trees). I testify the beginning of mating dance: the flies were flying up and down very quick. The distinctive colours, and the peculiar flight... called me Thank you all! |
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| jorgemotalmeida |
Posted on 16-06-2007 09:15
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Member Location: Viseu - PORTUGAL Posts: 9295 Joined: 05.06.06 |
according to Tony Irwin, in dipterist's handbook, it seems that all acrocerids were reared from lycosids spiders. The way that larva reaches the spiders is curious. The adults put eggs on the ground and when they mature, the larva can jump and seek for spiders - and enters in joints... and then go to the abdomen. In IV instar stage... they ate all spider...  |
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| Tony Irwin |
Posted on 16-06-2007 16:46
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Member Location: Norwich, England Posts: 7236 Joined: 19.11.04 |
jorgemotalmeida wrote: according to Tony Irwin, in dipterist's handbook, it seems that all acrocerids were reared from lycosids spiders. The Dipterists Handbook was written 30 years ago - I'm not sure whether more recent rearing records of (British) acrocerids include other families of spiders. Certainly other families are involved in North America. The Amateur Entomologists' Society has plans to revise the Dipterists Handbook, and publish a completely new edition. Although aimed primarily at British Dipterists, there will be plenty of useful up-to-date information for everyone when it appears.
Tony ---------- Tony Irwin |
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| jorgemotalmeida |
Posted on 16-06-2007 16:55
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Member Location: Viseu - PORTUGAL Posts: 9295 Joined: 05.06.06 |
great news! and when will be ready the new edition? |
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| Tony Irwin |
Posted on 16-06-2007 21:05
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Member Location: Norwich, England Posts: 7236 Joined: 19.11.04 |
jorgemotalmeida wrote: great news! and when will be ready the new edition? I'm not sure. The new edition will be like the last one - there will be quite a number of people involved in writing it, and the process of getting the new (or old! ) authors together has only just started. I guess it will be at least a year before it's available - most of the authors are likely to be busy with other things over the summer. I'll try to keep everyone posted on progress. Tony ---------- Tony Irwin |
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| Paul Beuk |
Posted on 20-06-2007 08:52
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 Super Administrator Location: Netherlands Posts: 19375 Joined: 11.05.04 |
I have seen nothing in these pictures that is in contradiction with Cyrtus gibbus as described in Die Fliegen der palaearktischen Region by Sack (1936).
Paul - - - - Paul Beuk on https://diptera.info |
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| jorgemotalmeida |
Posted on 20-06-2007 09:05
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Member Location: Viseu - PORTUGAL Posts: 9295 Joined: 05.06.06 |
Paul Beuk wrote: I have seen nothing in these pictures that is in contradiction with Cyrtus gibbus as described in Die Fliegen der palaearktischen Region by Sack (1936). And it was spotted here before. Anyway one of the most interesting flies I've ever seen since Myopa picta. Is there any information about the size of planidium for these flies?? Any scheme how it seems? I didn?t know that "They are cosmopolitan in distribution but rarely observed in most places; the majority of the over 500 species are known from fewer than 10 specimens." in wikipedia.org . It lacks there a link for diptera gallery.
Edited by jorgemotalmeida on 20-06-2007 10:43 |
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