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Hi, I was searching in Catalogue of life, and found Marginidae with one genus, Margo, but I couldn't find any info of this. Also, there are other never-before-heard families of diptera, like Iteaphila-group, Mystacinobiidae... Are there any sources about this dipteran familes which are completely unfindable on the net?

Also, I found this about the Mormotomyiidae, the fly family with the most restricted distribution. How could they look like? Could be really interesting, if they are relatives to hippoboscdae. Unfortunately the article does not cite references.