Sympistis genitalia. 29 S. ferrirena, male a valves b phallus with everted vesica 30 S. definita, male a valves b phallus with everted vesica 31 S. ferrirena, female.

 
 
  Part of: Crabo L, Hammond P, Mustelin T, Wikle D (2018) Six new species and one new subspecies of noctuid moths from western United States of America and Mexico (Lepidoptera, Noctuidae). In: Schmidt BC, Lafontaine JD (Eds) Contributions to the systematics of New World macro-moths VII. ZooKeys 788: 201-239. https://doi.org/10.3897/zookeys.788.26282