The genus Protearomyia was erected by McAlpine (1962). He ditinguished this genus from all other members of the Lonchaeidae by the following set of characters :
- Poststigmatical setae absent
- Lunule bare
- Scutellar margin with only the four strong setae - no setulae present
- body without stong greenish or bluish colouration (as in Lamprolonchaea)
Species of the genus are known from South America, temperate north America and Europe