Posted by John Carr on 25-04-2017 12:54
#6
The r-r crossvein means Sciophilinae in the traditional classification by Edwards. Most of Edwards' subfamilies are now considered families. The family Mycetophilidae is restricted to (Mycetophilinae + Sciophilnae sensu Edwards) and is often divided into about 8 subfamilies. At least 2 of the new subfamilies have the r-r crossvein.
I have also seen the crossvein called R2 and R4.