Thread subject: Diptera.info :: Lauxaniidae - Minettia fasciata
Posted by Mark-uk on 20-09-2010 21:43
#1
I have been sorting though a number of female
Minettia fasciata (group) and all the genitalia compares well with those in Collin (1948), but I have noticed one of the females has 3 sternopleural bristles, and all the others only 2. Could this be a means of separating out females of this group, of is it just an odd specimen?
Posted by rvanderweele on 20-09-2010 22:01
#2
Maybe a good suggestion to put Collin's old key aside and use the key of Bernard Merz instead for this group:
Revision of the Minettia fasciata group. I think you can download the pdf file from internet. Just google on Minettia fasciata group and "bingo"
Posted by rvanderweele on 20-09-2010 22:01
#3
Hmm,I am afraid it is never Bingo with the fasciata group....
Posted by Mark-uk on 21-09-2010 00:59
#4
I have seen Merz, but IMHO, Collin's key seems OK'ish for
fasciata. The troublesome parts in Collin is if one keys to
rivosa? Mert is probadly correct with the Synonym of
rivosa/fasciata. but is seems reasonably clear to me the Collin was looking at two species, so what was the species that Collin thought was
rivosa?
Some say female of fasciata group can't be identified, but the female genitalia seem reasonably clear in Merz (and Collin's
fasciata)
PS Mers download in on this site!
Posted by rvanderweele on 21-09-2010 05:19
#5
I had my whole life trouble with Minettia rivosa/fasciata! In my box, in fact, I have a fairly big number still labeled just: "fasciata/rivosa??"I think when I will retire I will sit down quietly and take all these animals from the box and examine them a bit closer. Not now, not in the mood for it.
Posted by rvanderweele on 21-09-2010 08:34
#7
even better. By the way, Paul, do you understand that I am always fighting with this Minettia "fasciata" group specimens?
Once I would like to give you the whole box and ask: well, what do you think?
Posted by Paul Beuk on 21-09-2010 11:11
#8
... and I'd probably say '
Minettia fasciata group'. :P
I have not dealt with any specimens after the revision was published, so...
Posted by rvanderweele on 21-09-2010 18:38
#9
true, exactly
Posted by Mark-uk on 21-09-2010 23:31
#10
That is a shame, Merz is OK, To be honest most of what I find is Minettia fasciata, so Colllin is OK too.
Entomology is a challenging subject, so we should we should engaged with these challenges and not just put then to one side.
Posted by rvanderweele on 22-09-2010 05:24
#11
A shame? Why? I don't see it that way. I have had so many discussions with Laci about Minettia. Years ago he said the only certainty with male you can get is after genital preparation. So if it is not always clear to him or if also Merz wrote me about the complexity of the genus Minettia I think a simple amateur dipterist, who can only "work" with his animal a few hours a week should not feel ashamed. I do not.