Schmidt in Pohl & Nanz (2023) provisionally transferred Oxycnemis gracillinea and O. acuna to Sympistis in Oncocnemidinae, based on morphology and the phylogeny of Keegan et al. (2019).

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

Keegan et al. (2019): https://doi.org/10.1111/syen.12336

Moth Photographers Group: https://mothphotographersgroup.msstate.edu/species.php?hodges=10043, https://mothphotographersgroup.msstate.edu/species.php?hodges=10044