Posted by atylotus on 09-06-2017 07:08
#4
2 pairs are even unique for Chironomus spec. There are some species with a reduced pair or even 1 pair. Some other genera can have 1 pair too and consequently resemble Chironomus. But this is Chironomus and almost impossible to identify to specieslevel. I know some European keys and the one by Epler from NA.