Thread subject: Diptera.info :: Muscidae, Lispocephala alma or falcatula -> Lispocephala needs revision

Posted by casebearer on 23-12-2019 02:17
#1
This female (4.5 mm) was collected at the outside of my house in a small town in the Netherlands (not far from Germany) near a forest on the 24th of November.

I believe it is Lispocephala alma or falcatula. Possibly genital dissection is needed to decide which one. On the other hand D'Assis Fonseca (Handbook for the Identification of British Insects. Diptera Cyclorrhapha Calyptrata Secion (Cool Muscidae. Royal Entomological Society of London Vol. X. Part 4 (Cool 1968; downloadable at royensoc.co.uk) presents a key on p. 68 - 69 by which it maybe identified (although not by me). D'Assis Fonseca in figure 12 (p. 66) also illustrates some differences in the placement of bristles on the fourth abdominal tergite. I have attached the figure below.

In addition the author gives as flight time April-May + July-September for alma and February till May for falcatula.

Maybe one of you can help me out.

Best wishes,

Henk ten Holt
Edited by casebearer on 02-02-2020 06:56

Posted by casebearer on 23-12-2019 02:19
#2
second picture

Posted by casebearer on 23-12-2019 02:20
#3
Third picture

Posted by casebearer on 23-12-2019 02:20
#4
Fourth picture

Posted by casebearer on 23-12-2019 02:21
#5
Figure 12 (D'Assis Fonseca, 1968, p. 66)
Edited by casebearer on 23-12-2019 02:22

Posted by casebearer on 26-01-2020 07:03
#6
Up! (Maybe somebody could reflect?)

Best wishes, Casebearer

Posted by Nikita Vikhrev on 26-01-2020 18:58
#7
Nobody knows are differences offered by Fonseca (or Gregor et al. 2002) reliable or not. Lispocephala requires revision.

Posted by casebearer on 02-02-2020 06:46
#8
Thanks very much for clearing that up , Nikita!

Best wishes, Henk