Aspilanta hydrangaeella

Adults distinguished from other Aspilanta species by antennae with white tips; congeners lack this feature. The combination of extremely small size (wingspan under 6 mm), metallic-silvery forewing pattern, and association with Hydrangea host plants supports identification. Larval leaf mines begin as long, sometimes contorted linear tracks that widen into elongate blotches; frass changes from a narrow line to a central smear as the mine expands. The elliptic exit hole with cut-out shield case is diagnostic for Heliozelidae.

Associated with deciduous forest and woodland edges where host hydrangeas grow. Found in habitats supporting smooth hydrangea (Hydrangea arborescens) and, less frequently, snowy hydrangea (Hydrangea radiata).

Eastern United States: Georgia, Illinois, Kentucky, Maryland, North Carolina, Ohio, and Tennessee.

Larvae feed as leaf miners on Hydrangeaceae: primarily smooth hydrangea (Hydrangea arborescens), occasionally snowy hydrangea (Hydrangea radiata).

• Hydrangea arborescens - primary larval hostsmooth hydrangea
• Hydrangea radiata - secondary larval hostsnowy hydrangea; less frequent

Eggs deposited on host leaves. Larvae mine leaves, creating linear-to-blotch mines with characteristic frass pattern. Mature larvae cut 3.5–4.5 mm elliptic cases from leaves, drop to ground, and pupate within. Pupal cases may overwinter; rearing records indicate diapause from November to February/March/April at 1–3°C.

Larvae are solitary leaf miners. Mature larvae actively cut shield-shaped pupal cases from host leaves and exit to ground level for pupation.

Leaf herbivore specializing on Hydrangeaceae. Host to parasitoid wasps including Chalcidoidea and Braconidae (Microgastrinae: Dolichogenidea or Pholetesor).

Minor economic significance as a specialist herbivore of ornamental hydrangeas. Not known to cause serious damage to cultivated plants. Scientific interest due to taxonomic reclassification and phylogenetic significance.

• Aspilanta oinophyllaSimilar size and wing pattern, but feeds on Vitaceae (grape family) rather than Hydrangeaceae; lacks white-tipped antennae.
• Other Aspilanta speciesAll share reduced wing venation and metallic markings, but differ in host plant associations and antennae coloration; A. hydrangaeella is the only species in the genus associated with Hydrangeaceae.
• Antispila speciesFormerly classified in this genus; Antispila species retained in that genus have different wing venation patterns and are not associated with Hydrangeaceae.

• leaf miner
• specialist herbivore
• Hydrangeaceae
• eastern North America
• shield-bearer moth

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• Splitting the leafmining shield-bearer moth genus Antispila Hübner (Lepidoptera, Heliozelidae): North American species with reduced venation placed in Aspilanta new genus, with a review of heliozelid morphology