Diptera.info :: Identification queries :: Diptera (adults)
Who is here? 1 guest(s)
 Fannia sp. - but which?
|
|
| Walther Gritsch |
Posted on 26-08-2010 22:25
|
 Member Location: Copenhagen Posts: 298 Joined: 31.01.09 |
Today 26. viii 2010 I caught this female Fannia sp. in deciduous forest near Copenhagen – as far as I remenber swept from grass. All of the body is greyish black without vittae or spots and subshining; inner posterior margin of hind coxae hairy; the presutural acrostichals are triserial. There is no av on t2, but as I see it a distinctly ventral seta. In the key I end up with F. subpubescens. Is that a good call...? Body length ~ 4 mm. Please shed some light on my ignorance  Regards, Walther Gritsch attached the following image:  [142.91Kb] Walther |
|
|
|
| javanerkelens |
Posted on 26-08-2010 23:04
|
 Member Location: Netherlands Posts: 2962 Joined: 18.10.07 |
From what i can see, seems the lower incurved fronto-orbitals not below level of insertion of arista ... And are the palps dilated..seems not I am thinking about Fannia carbonaria. (arista yellow at base) But i struggle always with Fannia  Joke Edited by javanerkelens on 26-08-2010 23:04 |
|
|
|
| Walther Gritsch |
Posted on 26-08-2010 23:31
|
|
Member Location: Copenhagen Posts: 298 Joined: 31.01.09 |
Thanks for trying, Joke. I'm having the same difficulties with Fannia - especially the females  All the same it cannot be carbonaria because of the hairy hind coxae and the fronto-orbital plates aren't shining black but grey pollinose. The question remains open... Walther |
|
|
|
| javanerkelens |
Posted on 27-08-2010 09:43
|
|
Member Location: Netherlands Posts: 2962 Joined: 18.10.07 |
Another try with the key from Hennig: Midcoxa without spine like bristle.... Gena not with 3-4 rows of britles... Hindcoxa with 1 or more hairs.... Tergites of abdomen not with black rounded spots... Midtibia with av (far on inner site).... Midtibia with more ad setae.... Then two possibilities: F.nitida (but has no pv on midtibia and orbitalplate strong convex) F.polychaeta...orbitalplate less convex and midtibia with strong av and pv Seems to fit, but Hennig mentioned only 1 strong av and 1 strong pv in female (characteristic) And it looks if there are 2 pv...? If i go further in the key the midtibia has only 1ad, so it almost has to be .....F.polychaeta  Joke Edited by javanerkelens on 27-08-2010 09:46 |
|
|
|
| Nikita Vikhrev |
Posted on 27-08-2010 09:54
|
 Member Location: Moscow, Russia Posts: 9555 Joined: 24.05.05 |
Correct, Joke. F. polychaeta has on t2 1-2(3)av and 1-2 pv. Nikita Vikhrev - Zool Museum of Moscow University |
|
|
|
| Walther Gritsch |
Posted on 27-08-2010 11:53
|
|
Member Location: Copenhagen Posts: 298 Joined: 31.01.09 |
Great! Thank you. An anteroventral in a ventral position... isn't that stretching it a bit  I already have the male in my collection. Regards, Walther |
|
|
|
| Jump to Forum: |