Dryadaula

Distinguished from other Tineoidea by the combination of small size, asymmetrical male genitalia, and association with bracket fungi or dead wood habitats. Within Dryadaulidae, species identification requires examination of genitalia and forewing pattern details. D. caucasica: grey forewings with black markings, wingspan ~11 mm. D. epischista: orange forewing ground color with brown and white pattern. D. orientalis: similar to D. epischista but distinguished by genitalia morphology and DNA barcoding (1.52-1.83% divergence).

Old-growth and mature forests with continuity of dead wood. Mesophilous mixed broadleaved forest stands, both managed (80+ years) and strict nature reserves (180+ years). Specific microhabitats include dead standing or fallen trunks of aspen and oak bearing sporocarps of bracket fungi (Polyporales).

Palaearctic region: Europe (Poland, Germany, Greece), Caucasus (Azerbaijan), Russia (European Russia, Lake Baikal region, Ussuri), East Asia (China, Korea, Japan). Hawaii (D. terpsichorella). Records from Sweden and Norway in GBIF. Many species likely more widely distributed but overlooked due to concealed lifestyle.

Adult activity generally May-September. D. caucasica: May-July. D. epischista and D. orientalis: July-September. Specific phenology varies by species and latitude.

Larvae develop inside sporocarps of bracket fungi (Polyporales). D. caucasica reared from Phellinus tremulae. Adults do not feed.

• Phellinus tremulae - larval development confirmedPolyporales; sporocarp substrate for D. caucasica larvae
• Bjerkandera adusta - present at capture siteresupinate fungus, Polyporales
• Ganoderma applanatum - present at capture sitebracket fungus, Polyporales
• Populus tremula - dead wood substrateaspen trunks bearing fungal sporocarps
• Quercus robur - dead wood substrateoak trunks bearing fungal sporocarps

Egg and larval stages unknown for most species. Larvae develop concealed within fungal sporocarps. Pupa: male of D. caucasica 4 mm long, 1.5 mm wide. Adult emergence timing varies by species and region.

Concealed lifestyle; larvae develop inside fungal sporocarps. Adults generally inconspicuous. Some species attracted to light (D. caucasica female at type locality; D. epischista, D. orientalis collected by light trap). D. terpsichorella exhibits distinctive 'dancing' behavior. Adults of some species captured in Malaise traps or barrier traps near dead wood with fungi.

Saproxylic mycophagous species contributing to decomposition of bracket fungi in old-growth forest ecosystems. Dependent on continuity of dead wood and associated fungal communities. Component of saproxylic Lepidoptera community in primeval forest habitats.

No direct economic importance. Subject of conservation interest as indicator of old-growth forest continuity and saproxylic biodiversity. Taxonomic study material for systematics of Tineoidea.

• Other Tineidae/Dryadaulidae generaDistinguished by asymmetrical male genitalia and specific association with bracket fungi; other tineids often associated with keratinaceous materials, lichens, or leaf litter
• NemapogonSimilar small size and mycophagy, but Nemapogon species typically have different genitalia symmetry and often associated with different fungal substrates

• mycophagous
• saproxylic
• old-growth forest dependent
• inconspicuous
• Palaearctic

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• Behavior of the Hawaiian Dancing Moth,Dryadaula terpsichorella(Tineidae: Dryadaulinae)
• First report of Dryadaula caucasica (Zagulajev, 1970) from Central Europe and records of further rare tineids (Lepidoptera: Tineidae) in Białowieża Primeval Forest
• A new species of the genus Dryadaula Meyrick (Lepidoptera, Dryadaulidae) from Japan, with a redescription of D.epischista (Meyrick, 1936).
• The genus Dryadaula Meyrick (Lepidoptera, Tineoidea, Dryadaulidae) in China, with descriptions of four new species and a world checklist.