Nystaleinae

Identification relies heavily on male genitalia morphology; the subfamily can be distinguished from other Notodontidae by characters of the male terminalia, including structure of the valvae, phallus, and associated sclerites. A pictorial key to genus based on male terminalia has been developed. External morphology is highly variable across the diverse genera, and reliable identification to genus or species often requires dissection and examination of genitalic structures.

Distributed exclusively in the Americas (New World), with the vast majority of species occurring in the Neotropical region. A few species extend northward into temperate North America, reaching as far north as Canada.

Has been observed to have ecological and economic importance, though specific details remain understudied. The group contributes to herbivore diversity in Neotropical ecosystems.

Economic importance has been noted in the literature, though specific impacts on agriculture, forestry, or other human activities are not well documented. Some species may serve as indicators of habitat quality in Neotropical ecosystems.

• DioptinaeRecent phylogenomic evidence indicates Dioptinae is nested within Nystaleinae; Dioptinae species are primarily diurnal and often aposematically colored, whereas Nystaleinae sensu stricto are predominantly nocturnal with more cryptic coloration
• Other Notodontidae subfamiliesNystaleinae can be distinguished by male genitalia characters, particularly the structure of the valvae and phallus; traditional external morphological characters have proven unreliable for distinguishing Nystaleinae from related subfamilies

• Neotropical
• prominent moths
• understudied
• genitalia-based identification
• New World endemic

• BugGuide
• Wikipedia
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• Nystaleinae moths (Lepidoptera: Notodontidae): A morphological review of the subfamily