Thread subject: Diptera.info :: Lispocephala alma?
Posted by John Bratton on 28-03-2015 12:14
#1
In Fonseca's 1968 key to Lispocephala, this runs easily to couplet 11/14 but then is not so straightforward.
The hind tibia has setae near the tip stouter on the anterior face than on the posterior, and the apical segment of the fore tarsus black except for a very narrow pale strip at the base, much less than a third: L. pallipalpis
The middle lobe of the genitalia is broad with three longitudinal ridges: L. almi
The lobes on sternite 5 have a large rounded distal extension like Gregor et al. 2002 show (fig. 44r) for L. falculata
I'm opting for alma as the middle lobe of the genitalia looks the least doubtful character but I'd appreciate a second opinion please.
John
Posted by John Bratton on 28-03-2015 12:15
#2
Dorsal view
Posted by John Bratton on 28-03-2015 12:16
#3
The hind tibia has setae near the tip stouter on the anterior face than on the posterior.
Posted by John Bratton on 28-03-2015 12:17
#4
The apical segment of the fore tarsus black except for a very narrow pale strip at the base, much less than a third: L. pallipalpis
Posted by John Bratton on 28-03-2015 12:18
#5
The middle lobe of the genitalia is broad with three longitudinal ridges: L. almi
Posted by John Bratton on 28-03-2015 12:19
#6
The lobes on sternite 5 have a large rounded distal extension like Gregor et al. 2002 show (fig. 44r) for L. falculata
Posted by John Bratton on 28-03-2015 12:20
#7
The lobes on sternite 5 have a large rounded distal extension like Gregor et al. 2002 show (fig. 44r) for L. falculata
Posted by Nikita Vikhrev on 28-03-2015 17:03
#8
I think that even Palaearctic
Lispocephala requires revision. For example, a week ago I collected in Crimea around small pond a series of 3 males.
tar1-5 - entirely black -
L. pallipalpis. 2 males with
a setulae in apical third of
t3 distinctly more erect and lengthened. 1 male with
a seta on
t3 unmodified.
Posted by andrewsi on 28-03-2015 20:59
#9
This series of pictures almost exactly mirrors a fly I ran through the keys last week, John. I ended up having exactly the same problem you are having and ended up plumping for alma, just as you have, based on the middle lobe of the genitalia. Pleased to see you had the same problems as me...if frustrated at the same time.
Posted by John Bratton on 30-03-2015 09:44
#10
Those are interesting responses, thanks.
I forgot to give the site details. It was collected 27 March 2015 in a small rocky wet heath within birch woodland, Llandegfan Common, SH577750, North Wales, UK.
John