Posted by paqui on 29-12-2009 00:06
#1
Hello, I´m looking at this genera now and a few doubts come to me,
- I copy the list fron Fauna Europaea:
Chorisops caroli Troiano 1995
Chorisops masoni Troiano & Toscano 1995
Chorisops nagatomii Rozkosny 1979
Chorisops tibialis (Meigen 1820)
Chorisops tunisiae (Becker 1915)
In Spain there are two recorded: C. tibialis and C. tunisiae, but I haven´t found any description of C. tunisiae:
- In "Lindner" there´s only C. tibialis, and C. tunisiae appears as a synonym (outdated, I suppose).
- "The manual of Palaearctic Diptera" separates Allognosta from Beris, Actina and Chorisops because Allognosta has no spinelike processes (scutellum) but the other 3 genera have 48!!, I´ve never seen all those spines, where are they? I link to a photo from the gallery:
http://www.dipter...to_id=3275 perhaps not visible with this angle (?)
- "Faune de France" has only C. tibialis and doesn´t tell a number of spines
Looking for more Chorisops pictures I´ve seen this one, from Portugal: http://commons.wi...2008-1.jpg The Portugese records (until 2002) were C. nagatomi and C. tunisiae ,
- "British soldier flies... " covers C. tibialis and C. nagatomi (orange abdomen) so perhaps the one from this picture is C. tunisiae ? This book says Chorisops has 4 spines (or 6 in aberrant specimens), so perhaps "spinelike processes" are smaller or thinner than normal spines (?)
Any help with any of these questions is welcome (where/how are the spines and/or any reference (article) with description of C. tunisiae).
Thank you all very much for your atention
And happy new year
