Nemapogon molybdanella is a moth of the family Tineidae, found in North America. Sightings have been recorded in Arizona, California, and Maine with a notable wingspan of 14âÂÂ17 mm and a metallic sheen on its forewings.
First described in 1905 by William G. Dietz as Tinea molybdanella from specimens collected in Pasadena, California, it is native to western North America, primarily occurring in California from lowlands up to elevations of 6,000 feet (1,800 m).
The larvae are fungivores, feeding on and boring into various fungi, including genera such as Hypoxylon, Ganoderma, Fomes, Polyporus, and Poria, all of which grow on decaying hardwood. Adult moths have been observed emerging in late winter, though the timing of flight likely varies across different locations. While little is documented about adult feeding, nemapogon molybdanella contributes to ecosystem processes as a specialized consumer of wood-decaying fungi.
Nemapogon molybdanella occurs throughout western North America, with most confirmed sightings concentrated in California. Within the state, it is widely distributed and has been recorded at elevations reaching up to 6,000 feet in suitable habitats.
The species was first described based on specimens collected in Pasadena, California, representing its earliest documented presence. Later surveys have broadened its known range, including confirmed observations in Edwards County, Texas, in 2017 and 2019. More recently, citizen science reports have added records from specific California locations, such as Monterey County (notably a February 2004 sighting) and Tehama County.