Scythrididae

Definition

A family of small moths in the superfamily Gelechioidea, characterized by adults that appear teardrop-shaped when at rest. Historically treated as a subfamily (Scythridinae) within Xyloryctidae, and occasionally further nested within Oecophoridae, reflecting ongoing taxonomic revision in this group of microlepidoptera.

Etymology

From the type genus Scythris (Greek skythros, 'sullen' or 'gloomy', possibly referring to the dull coloration of some species) + -idae (family suffix).

Example

Scythrididae larvae are typically internal feeders in plant stems, flowers, or seeds; for example, some species mine within Asteraceae flower heads or feed inside grass stems, making them ecologically significant though often overlooked in surveys.

Synonyms

• Scythridinae (when treated as subfamily of Xyloryctidae)

Related Terms

• Gelechioidea
• Xyloryctidae
• Oecophoridae
• microlepidoptera
• stem borer
• internal feeder

Usage Notes

Family rank is currently accepted in most modern classifications, but the unstable higher-level taxonomy of Gelechioidea means literature may refer to these moths as scythridines (subfamily) or place them within expanded conceptions of Oecophoridae. Check source date for taxonomic context. Adults are small (wingspans typically 6–15 mm) and often require genitalic dissection for definitive identification.