Thread subject: Diptera.info :: the day of Ptychopteridae
Posted by guenille on 10-11-2007 17:49
#1
As unknow as Anthomyiidae I think but more beautiful. Sorry for bad picture but they are not so common
Can you say more than Ptychoptera ?
Thanks for help
edith
near paris, june 16th, ~15mm
Posted by Louis Boumans on 11-11-2007 20:53
#2
Are you also a fan of John Wyndham's famous book?! (The Day of the Triffids)
Anyway, two species of Ptychopteridae are common, P. albimana and P. contaminata, and I think this one is neither. So, interesting.
I have a key of the British species by Stubbs, but I don't have time right now to study the key.
Posted by Sundew on 11-11-2007 23:33
#3
To me, this seems to be a tipulid with the name
Dictenidia bimaculata.
Regards, Sundew
Posted by Jan Willem on 12-11-2007 08:06
#4
It seems to me that "Sundew" is completely right!
Posted by Chen Young on 12-11-2007 17:40
#5
The character to set this two groups apart lays in the number of anal veins. Tipulid has two anal veins while ptychopterid has only one anal vein. Here is a
brief key for your info.
Posted by guenille on 12-11-2007 19:00
#6
Many many thanks Chen, too much difficult for me for this time but I will learn it when my english will be better.
Posted by Louis Boumans on 12-11-2007 21:40
#7
Ah, you're right! I didn't even look at the anal veins, a good example of 'tunnel vision'. Of course Ptychopteridae and Tipulidae are also quite different in size, well generally speaking.