Undulambia polystichalis

Distinguished from other Undulambia species by genitalia morphology and geographic range. The small size (12–15 mm wingspan) and bimodal adult flight period may aid field identification, though definitive identification requires dissection or molecular analysis.

Small moth with wingspan of 12–15 mm. Specific wing pattern details are not documented in available sources.

Associated with habitats supporting its host fern, Rumohra adiantiformis. The host fern typically occurs in subtropical and tropical forest understories, though specific habitat requirements for the moth remain undocumented.

Recorded from Cuba and the southeastern United States (Florida).

Adults active January–May and July–November, indicating bimodal flight pattern with apparent summer diapause or reduced activity during peak summer months.

Larvae feed on Rumohra adiantiformis (leatherleaf fern). Adult feeding habits are unknown.

• Rumohra adiantiformis - larval hostLarvae bore into fern fronds

Larval boring behavior creates internal feeding tunnels within fern fronds. Adult flight pattern shows two distinct peaks separated by summer months.

Herbivore specializing on fern tissue; potential pest of commercial leatherleaf fern cultivation.

Economic significance as a pest of Rumohra adiantiformis, which is widely cultivated for the floral industry. Larval boring damage reduces marketability of cut fronds.

• Other Undulambia speciesGenus-level morphological similarity; requires genitalia examination for definitive separation

• fern borer
• pest
• floral industry
• Cuba
• Florida
• bimodal flight

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• Catalogue of Life