Sympistis extremis. Revised species status from Troubridge and Crabo (1999). Generic combination from Troubridge (2008).
<ul>
      <li>Troubridge JT, Crabo LG (1998 (1999)) New Oncocnemis (Lepidoptera: Noctuidae) from the Pacific Northwest. Journal of the Entomological Society of British Columbia 95: 33-51.</li>
      <li>Troubridge JT (2008) A generic realignment of the Oncocnemidini sensu Hodges (1983) (Lepidoptera: Noctuidae: Oncocnemidinae), with descriptions of a new genus and 50 new species. Zootaxa 1903: 1-95.</li>
  </ul>