Coptotriche fuscomarginella
(Chambers, 1875)
Coptotriche fuscomarginella is a small in the Tischeriidae, first described by Vactor Tousey Chambers in 1875. The is known from six US states in the eastern and midwestern United States. Its larvae are leaf miners that feed on chestnut and oak species, creating distinctive mines within leaves.
Pronunciation
How to pronounce Coptotriche fuscomarginella: /kɒp.toʊˈtraɪ.ki fuːs.koʊ.mɑːr.dʒɪˈnɛl.ə/
These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.
Identification
Members of the Coptotriche are small with narrow, wings. Specific diagnostic features for C. fuscomarginella require examination of genitalia or larval association. The may be distinguished from congeneric species by geographic range and confirmed larval hosts (Castanea dentata, Quercus muehlenbergii, Quercus prinus).
Habitat
Associated with deciduous forests containing trees: American chestnut (Castanea dentata), chinkapin oak (Quercus muehlenbergii), and chestnut oak (Quercus prinus).
Distribution
United States: Kentucky, Massachusetts, New Jersey, New York, Ohio, and Virginia.
Diet
Larvae feed on leaves of Castanea dentata, Quercus muehlenbergii, and Quercus prinus. do not feed; mouthparts are reduced or absent.
Host Associations
- Castanea dentata - larval
- Quercus muehlenbergii - larval
- Quercus prinus - larval
Life Cycle
Larvae mine leaves of plants, creating internal feeding tunnels. Specific details of , timing, and number of per year have not been documented.
Behavior
Larvae are leaf miners, feeding between the upper and lower of leaves. Mining creates visible blotches or serpentine trails on leaf surfaces.
Ecological Role
As a , larvae contribute to herbivore pressure on oak and chestnut . The species may serve as prey for and other natural enemies, though specific relationships are undocumented.
Similar Taxa
- Other Coptotriche speciesSimilar size and wing shape; require genitalia dissection or plant association for reliable identification.
- Tischeria speciesFormerly placed in this ; now distinguished by wing venation and genitalia characters.
More Details
Nomenclatural history
Originally described as Tischeria fuscomarginella by Chambers in 1875, later transferred to Coptotriche based on revised generic concepts in Tischeriidae.
Conservation note
Primary Castanea dentata was functionally eliminated by chestnut blight in the early 20th century; current larval likely persist on surviving root sprouts or have shifted to oak hosts.