Thread subject: Diptera.info :: Pleustonic Empididae - São Paulo, Brazil
Posted by Walther Ishikawa on 08-10-2017 01:58
#1
Hello! These Diptera were photographed in small streams in Atlantic Forest, São Paulo State, Brazil. Serra da Cantareira Park - Núcleo Engordador. There were swarms of these insects hovering in the water surface, together with Gerridae and Velidae.
I think they are Empididae, but I didn´t found papers describing this behavior, they are common just above the water, but I never found any mention of a really pleustonic species. It seems that they have hydrophobous fur in the legs.
Can anybody confirm the ID? Any information about this behavior?
Thank you very much!!
A video:
https://youtu.be/...
Posted by John Carr on 08-10-2017 20:15
#2
Many species of
Hilara and
Rhamphomyia (Megacyttarus) swarm low above water, but your fly is neither of those groups.
Hilara and, as far as I know, Brazilian relatives, have forked R4+5.
If it is tribe Empidini it should be
Porphyrochroa.
Rhamphomyia has shorter first flagellomere.
Macrostomus has a reduced anal lobe. If it is, you should find your species here:
http://www.tandfo...0903437333. (I do not have access to the journal.)
Edited by John Carr on 08-10-2017 20:16
Posted by Walther Ishikawa on 08-10-2017 22:25
#3
Thank you very much, John!!
If I have some news, I will update the thread.
All the best!
W.
Posted by crex on 09-10-2017 22:35
#4
PDF
Posted by Walther Ishikawa on 11-10-2017 01:46
#5
Thank you very much crex!
All the best!
W.