Thread subject: Diptera.info :: Dolichopus sp.
Posted by valter on 26-11-2007 08:52
#1
Location: Portugal (south)
Date Phot Taken: November 25, 2007
Edited by valter on 05-02-2014 20:05
Posted by Kahis on 26-11-2007 09:16
#2
Dolichopus (Dolichopodidae)
Posted by valter on 26-11-2007 09:29
#3
Which Species? In Portugal there are 4:
D. pennatus
D. diadema
D. strigipes
D. vitripennis
Which of Them?
Posted by Paul Beuk on 26-11-2007 12:24
#4
Undoubtedly there will be more than four
Dolichopus species in Portugal.
Posted by valter on 26-11-2007 12:38
#5
Paul Beuk wrote:
Undoubtedly there will be more than four Dolichopus species in Portugal.
I found only 4 at Fauna Europaea:
http://www.faunae...bution.php
Info: Fauna Europaea was supported by the European Commission.
Posted by Paul Beuk on 26-11-2007 13:05
#6
1. Fauna Europaea is only as good as the data supplied by the specialists and may not have been updated recently.
2. The fact that the EU sponsered the project is no guarantee that everything is correct. ;)
Posted by valter on 26-11-2007 14:47
#7
Paul Beuk wrote:
Undoubtedly there will be more than four Dolichopus species in Portugal.
How did you know that? What are your sources?
Posted by Paul Beuk on 26-11-2007 15:29
#8
Common sense. Carles Tolra mentions 25 species for a relatively underrecorded country like Spain. Makes it hard to believe that an even more underrecorded country like Portugal would only have 4 species.
http://www.sea-en...MSEA08.pdf
Posted by Kahis on 26-11-2007 15:29
#9
valter wrote:
Paul Beuk wrote:
Undoubtedly there will be more than four Dolichopus species in Portugal.
How did you know that? What are your sources?
Well, considering the 28 species listed from Spain in Fauna Eur. I'd say it is *very* unlikely that Portugal has only four species :)
Posted by ChrisR on 26-11-2007 15:29
#10
I think Paul is working on 'common sense' and his experience of other countries in the region ... it's a pretty good educated guess ;) Fauna Europaea is an excellent project but you do have to remember that it relies on an expert in that country sending the records in and the Iberian peninsular is quite poorly studdied - especially in the more difficult groups. So, you can't treat it as a complete species list for every European country - just what someone has seen there :)
Posted by Xespok on 26-11-2007 15:30
#11
Well Faunaeur represents our current knowledge on the European fauna.
This is far from being complete, in fact it will never be complete.
For smaller countries, particularly with no major dipterological history some families are poorly known and consequently the database will not contain many species.
Hungary has a relatively strong dipterological history. Yet the experts estimate that we only know 50-75% of the diptera fauna of the country. For some families the value is higher, and 100% of the fauna is known, for some families, where no extensive research was done (Most Nematocera, Phoridae etc) the number of unknown species may actually exceed that of the known species.
Dolichopus is a difficult genus, and special knowledge is needed for species level ids. It is possible that in Portugal no dipterist ever worked with that family. Maybe some visitors collected some samples, which yielded only those four species. This does not mean that you could not add another 10 species in one year, if you focused on identifying and recording Dolichopus spp.
Edited by Xespok on 26-11-2007 15:32
Posted by Kahis on 26-11-2007 15:32
#12
Wow, talk about overkill.
It is a female which makes identification from a photo difficult. It could be
Dolichopus pennatus, but it has several close relatives in the region.
Posted by Kahis on 26-11-2007 15:36
#13
Xespok wrote:
Dolichopus is a difficult genus, and special knowledge is needed for species level ids.
Not so! :p In my opinion
Dolichopus is among the easier flies to identify, especially considering the size. Many species can be identified in the field, and nearly all species 'at glance' in the lab. Females are less trivial, but still identifiable with few expections.
You are right about the special knowledge part, but isn't that true for any animal group? ;)
Posted by valter on 26-11-2007 17:31
#14
Size: Small Fly
See the real size on the leaf:
Posted by Igor Grichanov on 27-11-2007 11:29
#15
East Mediterranean has 84 species of Dolichopus (Grichanov, I.Ya. 2007. A checklist and keys to Dolichopodidae (Diptera) of the Caucasus, http://www.diptera.info/downloads.php?cat_id=8). I think about the same numbers are present in West Mediterranean. Regarding your picture, it seems that Wing with at least first bend of M1+2 rectangular, and Hind basitarsus with only one dorsal seta. If so, then this very common and widespread in Mediterraneans is most probable.
Dolichopus griseipennis Stannius, 1831: Isis (Oken) 1831: 49 ** Type locality: France: Lyon. Palaearctic: Algeria, ?Armenia, Azerbaijan, Austria, Belgium, Bulgaria, Bosnia and Herzegovina, Croatia, Cyprus; Czech, Denmark, Estonia, Finland, France, Georgia, Germany, Great Britain, Greece incl. Crete; Hungary, Ireland, Israel; Italy, N Kazakhstan, Lithuania, Luxembourg, ?Macedonia, Morocco, Netherlands, Norway, Poland, Romania, Russia: Adygea, Krasnodar, Moscow; Slovakia, ?Slovenia, Spain incl. Balearic Is., Sweden, Switzerland, Tunisia, Turkey, Yugoslavia; Middle Asia *