Gallery Links
Users Online
· Guests Online: 30

· Members Online: 0

· Total Members: 4,950
· Newest Member: JeffersonA
Forum Threads
Theme Switcher
Switch to:
Last Seen Users
· Volker00:09:30
· Gansucha00:29:27
· smol00:45:18
· Jan Maca00:51:30
· Tony Irwin01:35:06
· Joerg Schneider01:36:35
· weia02:15:38
· ESant02:22:38
· Nosferatumyia02:29:02
· Carnifex03:09:01
Latest Photo Additions
View Thread
Diptera.info :: Identification queries :: Diptera (adults)
Who is here? 1 guest(s)
 Print Thread
Leptocera or related to ID (Sphaeroceridae)
rafael_carbonell
#1 Print Post
Posted on 24-11-2020 16:41
User Avatar

Member

Location: Beuda, Girona, Catalonia
Posts: 655
Joined: 23.03.06

Very small fly on the window, 24/11/2020 (Spain: Girona: Catalonia: Beuda).

Identification following Marshall & Richards in McAlpine et al 1987 Manual of Nearctic Diptera to Leptocera, but then stopped as arriving to a cul-de-sac (as there are some genera missing in that key, present in Spain, Carles-Tolrà, 2002).

Wing apparently functional;
halter with knob
Cell cup open to wing margin, CuA2 absent, and cell bm confluent with cell dm;
CuA1 never reaching wing margin, except as a weak fold.
LIMOSININAE

Disc of scutellum bare.
Margin of scutellum always bare between apical bristles
Mid tibia with a long preapical ventral bristle

Mid tibia with an apicoventral bristle
Scutellum with six marginal bristles (so it's not Peremis fenestralis)
Leptocera Olivier (four subgenera).
rafael_carbonell attached the following image:


[271.55Kb]
 
rafael_carbonell
#2 Print Post
Posted on 24-11-2020 16:42
User Avatar

Member

Location: Beuda, Girona, Catalonia
Posts: 655
Joined: 23.03.06

...
rafael_carbonell attached the following image:


[231.42Kb]
 
rafael_carbonell
#3 Print Post
Posted on 24-11-2020 16:42
User Avatar

Member

Location: Beuda, Girona, Catalonia
Posts: 655
Joined: 23.03.06

...
rafael_carbonell attached the following image:


[229.64Kb]
 
rafael_carbonell
#4 Print Post
Posted on 24-11-2020 16:43
User Avatar

Member

Location: Beuda, Girona, Catalonia
Posts: 655
Joined: 23.03.06

...
rafael_carbonell attached the following image:


[229.38Kb]
 
rafael_carbonell
#5 Print Post
Posted on 24-11-2020 16:46
User Avatar

Member

Location: Beuda, Girona, Catalonia
Posts: 655
Joined: 23.03.06

Mid tibia with a long preapical ventral bristle and with an apicoventral bristle
Scutellum with six marginal bristles
rafael_carbonell attached the following image:


[200.96Kb]
Edited by rafael_carbonell on 24-11-2020 16:47
 
daveb21
#6 Print Post
Posted on 27-11-2020 12:54
Member

Location: Norfolk UK
Posts: 133
Joined: 30.10.14

Hi Rafael,
You have missed the small setae on either side of the scutellum just behind the thorax (they can be hard to see) Leptocera nigra seems most likely, to confirm if it is nigra there will be along postero-apical bristle that extends downwards over and close to the metatarsus and acrosticials will all be short
 
rafael_carbonell
#7 Print Post
Posted on 27-11-2020 17:38
User Avatar

Member

Location: Beuda, Girona, Catalonia
Posts: 655
Joined: 23.03.06

Thanks for your answer Pfft



1. There are 8 lateral marginal setae on scutellum

2. I have been looking the mid leg of L. nigra to compare, here: http://www.spessa...leg3a.html and it looks similar.

On my fly mid basitarsi there is:
- one apical ventral setae
- one apical posterior setae
(any of them extends downwards over and close to the basitarsus)
(when you say "metatarsi" do you refer to hind tarsi?: there are only a row of hairs there)

3. There are several rows of setae on mesoscutum (more than the usual for calyptrata) and it’s hard to say which rows are achrosticals, there could be some long setae in there ... or not

4) Do you know which sex it is?
rafael_carbonell attached the following image:


[283.25Kb]
 
daveb21
#8 Print Post
Posted on 27-11-2020 17:54
Member

Location: Norfolk UK
Posts: 133
Joined: 30.10.14

On the mid tibia, postero apical, extends directly downwards, it's very close to the basitarsis and can be hard to see even though long and strong. If the acrosticials aren't distinctly longer and stronger than other setae then should be nigra. Looks like a male from the shape.
 
rafael_carbonell
#9 Print Post
Posted on 27-11-2020 18:25
User Avatar

Member

Location: Beuda, Girona, Catalonia
Posts: 655
Joined: 23.03.06

Hi David (?), is it possible the quetotaxy of the mid leg of the male of this species is different from the one of the female ?

In the link shown before there is a mid leg of the supposed male; but there are pics of other specimens, a different one from a supposed female: http://www.spessa...leg2a.html

Anyway, the apical tibial setae next to basitarsus could be hidden in my pictures...

In this other picture it seems there are no long setae on achrostical postion, so we can say this is Leptocera nigra:
rafael_carbonell attached the following image:


[170.39Kb]
Edited by rafael_carbonell on 27-11-2020 18:39
 
rafael_carbonell
#10 Print Post
Posted on 27-11-2020 20:10
User Avatar

Member

Location: Beuda, Girona, Catalonia
Posts: 655
Joined: 23.03.06

Finally I understood that Leptocera nigra thorax has hairs (that look like small setae), small achrosticals and big dorsocentrals. "Acrosticales indistinctes de la pilosité du fond."(Séguy)

L. fontinalis and L. oldenbergi have hairs, big achrosticals and big dorsocentrals (Acrosticales distinctes de la pilosité du fond.)

I found my specimen different from this one Leptocera nigra:
http://www.microp...0nigra.htm but now I understood this one has the dorsocentrals fallen.
Edited by rafael_carbonell on 27-11-2020 22:55
 
Jump to Forum:
Similar Threads
Thread Forum Replies Last Post
Sphaeroceridae individual? Diptera (adults) 3 04-03-2024 22:26
Sphaeroceridae ID Diptera (adults) 1 02-03-2024 21:16
Sphaeroceridae? Diptera (adults) 4 29-02-2024 21:26
Sphaeroceridae with mite -> Pullimosina heteroneura Diptera (adults) 7 26-02-2024 11:03
Sphaeroceridae -> Crumomyia spec Diptera (adults) 2 26-02-2024 11:01
Date and time
29 March 2024 14:19
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
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.

07.03.24 00:01
Some flies preserved in ethanol and then pinned often get the eyes sunken, how can this be avoided? Best answer: I usually keep alcohol-collected material in alcohol

17.08.23 15:23
Aneomochtherus

17.08.23 13:54
Tony, I HAD a blank in the file name. Sorry!

17.08.23 13:44
Tony, thanks! I tried it (see "Cylindromyia" Wink but don't see the image in the post.

17.08.23 11:37
pjt - just send the post and attached image. Do not preview thread, as this will lose the link to the image,

16.08.23 08:37
Tried to attach an image to a forum post. jpg, 32kB, 72dpi, no blanks, ... File name is correctly displayed, but when I click "Preview Thread" it just vanishes. Help!

23.02.23 21:29
Has anyone used the Leica DM500, any comments.

27.12.22 21:10
Thanks, Jan Willem! Much appreciated. Grin

19.12.22 11:33
Thanks Paul for your work on keeping this forum available! Just made a donation via PayPal.

09.10.22 17:07
Yes, dipterologists from far abroad, please buy your copy at veldshop. Stamps will be expensive, but he, the book is unreasonably cheap Smile

Render time: 1.25 seconds | 189,906,850 unique visits