Gallery Links
Users Online
· Guests Online: 9

· Members Online: 0

· Total Members: 4,769
· Newest Member: Drosomad
Forum Threads
Theme Switcher
Switch to:
Last Seen Users
· Juergen Peters< 5 mins
· runetk00:09:13
· Andrew Whitt...00:16:17
· Carnifex00:21:42
· Tony Irwin00:22:13
· RamiP00:56:04
· Jozef Obona01:15:58
· weia01:27:56
· janoves01:38:11
· Tetrao01:39:00
Latest Photo Additions
View Thread :: Identification queries :: Diptera (adults)
Who is here? 1 guest(s)
 Print Thread
Mycetophilidae => Dziedzickia? No, Trichonta
Steve Scholnick
#1 Print Post
Posted on 20-02-2021 00:17

Location: Maryland, USA
Posts: 113
Joined: 25.12.17

female fungus gnat found near the Potomac River. Keys out to Dziedzickia using the Manual of the Nearctic Diptera and in Shaw & Fisher's 1952 paper on "Fungivoridae". MND says "Dziedzickia is undoubtedly a complex of several genera." and the genus appears to include species with and without wing vein R2+3 (from Baxter, 1989: "The Nearctic species D. longicornis (Coquillett), D. polyzona (Loew), D. separata (Johannsen), and D. vittata (Coq.) differ from Hadroneura, D. marginata, and D. pentastylobia in the absence of vein R2+3." (https://www.jstor...e/25085060)). body length ~4mm

Not every character state in each MND couplet fits so I'd appreciate confirmation/correction of the ID. Thanks in advance for the help.


dorsal view of right wing; ventral view of left
Edited by Steve Scholnick on 20-02-2021 18:15
Paul Beuk
#2 Print Post
Posted on 20-02-2021 08:16
User Avatar

Super Administrator

Location: Netherlands
Posts: 19012
Joined: 11.05.04

You misinterpreted the character of the arrangement of the microtrichia on the wing. In photo V at highest magnification you can see that the microtrichia are arranged in longitudinal lines near the tip of the wing. Once you have established that they key leads you straight to Trichonta. In most cases females are quite problematic to identify.

- - - -

Paul Beuk on
Steve Scholnick
#3 Print Post
Posted on 20-02-2021 18:17

Location: Maryland, USA
Posts: 113
Joined: 25.12.17

Thanks Paul! I took the nice orderly lines of microtrichia in the MND figure too literally. Here's a crop of the right wing

(I'm not sure why I have so much trouble uploading photos to this site. Even a 145KB image named 1.jpg that's 600 pixels wide doesn't upload)
Edited by Steve Scholnick on 20-02-2021 18:28
Paul Beuk
#4 Print Post
Posted on 21-02-2021 10:05
User Avatar

Super Administrator

Location: Netherlands
Posts: 19012
Joined: 11.05.04

It is even more distinctly visible in the more posterior part of the wing apex where the cell are broader.

- - - -

Paul Beuk on
Jump to Forum:
Similar Threads
Thread Forum Replies Last Post
Mycetophilidae ? Diptera (adults) 4 20-06-2022 09:31
Mycetophilidae Diptera (adults) 1 05-06-2022 10:34
Mycetophilidae, indoors Diptera (adults) 1 02-06-2022 22:07
Mycetophilidae Diptera (adults) 2 25-05-2022 19:11
larva ID. >Mycetophilidae Diptera (eggs, larvae, pupae) 3 10-05-2022 11:44
Date and time
28 June 2022 09:15


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.

Please, help to make
possible and enable
further improvements!
Latest Articles
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
You must login to post a message.

19.06.22 07:42
I can not post an image - I do all right - dont know what to do! Gunther

24.05.22 11:28
Hi! would anyone be able to send on a scan of Delia sanctijacobi redescription from: GRIFFITHS, G.C.D. 1993. Anthomyiidae [part]. In: Flies of the Nearctic Region, 8(2), 10. Thank you!

18.05.22 16:26
Delay, alas, due to Covid related issues. But it will be published !!

18.05.22 16:26
Publication of the English translation of the Fieldguide to Homeodactyla of northwest Europe is due September

14.05.22 07:24
Hi, 3 threads in Eggs, etc should be in adults - possible to change please?

13.04.22 07:52

12.04.22 07:41
cant attach picture to post in forum, what do I do wrong? Sorry Novice question ...

09.01.22 16:56
Hello, I'm looking for literature on chironomid larvae that are able to survive after being entrapped in ice for at least several days . So far I've only found literature on Eretmoptera murphy

11.12.21 16:10
Dematoneura in the gallery should be DeSmatoneura

23.09.21 14:29
All sorted.

Render time: 2.99 seconds | 166,062,156 unique visits