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Thanks a lot.
I am a bit confused. In my previous post on Trachysiphonella, you mentioned that scutellata has more than one dark spot on the pleura, like here. However, in the following paper there is a picture of Trachysiphonella ruficeps and it has three dark spots, and it looks alike my specimens (at least the light one):
https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.13210
Are there other features that I could investigate to distinguish the two species?