Schmidt in Pohl & Nanz (2023) synonymized Protorthodes with Trichopolia, based on similar antennal and genitalic morphology, wing phenotype, and DNA barcode variation, the type species determined to be congeneric.

Pohl & Nanz (2023): http://wedgefoundation.org/MONA2.asp

Moth Photographers Group: https://mothphotographersgroup.msstate.edu/species.php?phylo=933103 and related species pages