Landryia matutella

Landryia matutella can be distinguished from similar Scythrididae genera such as Scythris and Neoscythris by genitalic examination revealing asymmetrical genitalia. Externally, species in this family are extremely small and superficially similar, making field identification to genus or species level difficult without dissection. The moth was initially tentatively identified as possibly related to Scythris mixaula, a western species associated with cactus, but differs in geographic distribution.

Extremely small moth with a total body length of approximately 4-5 mm. The body is slender and moth-like in typical microlepidopteran form. Members of the genus Landryia are distinguished by genitalic characters, specifically strikingly asymmetrical genitalia that are diagnostic for the genus.

Observed on composite shrubs with small yellow flowers in prairie environments. The habitat described was a dry roadside clay bank in an area that appeared quite dry with limited insect activity. Associated with flowering vegetation in open, exposed sites subject to wind.

Recorded from Saskatchewan, Canada. The genus Landryia occurs in North America; the specific locality mentioned in source material was a roadside clay bank in Crawford, Nebraska, though this particular record was not definitively confirmed as L. matutella.

Observed in early September (Day 2 of a fall collecting trip in 2010). Activity appears to coincide with flowering of composite shrubs in late summer to early autumn.

Adults are active on flowers during daylight hours. Individuals are nervous and easily disturbed, making observation and photography challenging. They occur in dense aggregations on flowering vegetation, with shrubs described as 'covered with them' when present.

Adults visit flowers, suggesting potential role as pollinators of composite shrubs. Larval ecology unknown for this species; related scythridid species are typically internal feeders (leaf miners) on Asteraceae.

Of interest to microlepidopterists and photographers due to extremely small size and taxonomic uncertainty. Represents the challenge of documenting understudied microlepidopteran diversity. No economic significance documented.

• Scythris mixaulaExternally similar small scythridid moth found in western states; differs in host association (cactus-feeding) and geographic distribution, not known from the Great Basin
• Neoscythris speciesSimilar minute flower moths in same family; distinguished by symmetrical genitalia and other internal characters
• Scythris speciesLargest genus in family with superficially similar appearance; distinguished by genitalic characters and often by host plant associations

• microlepidoptera
• flower moth
• prairie
• undescribed diversity
• Scythrididae

• BugGuide
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Tiny little slivers of life | Beetles In The Bush