Erechthias

Erechthias sensu stricto is distinguished from related genera by having all wing veins separate (hindwing veins 5 and 6 not stalked) and the clasper's harpe nude rather than bearing a cluster of setae on the costa. Female genitalia appear nearly identical across the genus and related taxa, making species-level identification challenging. The genus has been historically confused with Tinea, Acridotarsa, Mesopherna, Cosmopteryx, and Argyresthia due to superficial similarities.

Found in diverse terrestrial habitats including forested areas, coastal zones, and seabird nesting sites. Some species occupy highly restricted habitats: E. darwini is endemic to St. Paul's Rocks (less than 2 ha), while E. nidumicola inhabits wedge-tailed shearwater nests on oceanic islands.

Predominantly Indo-Pacific distribution with pantropical elements; occurs in Africa, Asia, Australia, Pacific islands, and the Americas. Some species are pan-global (E. zebrina), others endemic to single island systems (E. itoi to Ogasawara Islands, E. darwini to St. Paul's Rocks).

Larvae are predominantly detritivorous, feeding on dead plant tissues including dead leaves, branches, and wood bark. Some species feed on living plant tissues, lichens, or bat guano. E. nidumicola larvae have been collected from seabird nests where they probably feed on seaweed.

• Puffinus pacificus - habitatwedge-tailed shearwater nests used by E. nidumicola

Detritivore contributing to decomposition of dead plant material in forest and coastal ecosystems.

• DecadarchisHindwing veins 5 and 6 stalked; clasper's harpe bears setae on costa
• EreunetisFrequently considered separate genus based on genitalic differences
• ComodicaIntermediate morphology; delimitation still unresolved
• TineaHistorical misidentification of Decadarchis group members
• CosmopteryxE. cyanosticta initially mistaken for this unrelated cosmet moth genus
• ArgyresthiaE. zebrina initially mistaken for this unrelated ermine moth genus

• detritivore
• fungus moth
• Tineidae
• Erechthiinae
• Indo-Pacific
• island endemic
• seabird nest associate
• taxonomically disputed

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• Darwin's moth from St. Paul's Rocks: a new species of Erechthias (Tineidae)
• Taxonomic study of the genus Erechthias (Lepidoptera, Tineidae) from the Ogasawara Islands, with two new records and four new species.