Stigmella altella
(Braun, 1914) Wilkinson et al., 1981
Stigmella altella is a minute leaf-mining in the , known from Ohio and Maine in the United States. The has a wingspan of 5.6–6.4 mm. It completes one per year in Ohio, with mining oak leaves in autumn and emerging the following spring. The larvae are specialized feeders on two oak species: Quercus imbricaria and Quercus palustris.
Pronunciation
How to pronounce Stigmella altella: /stɪɡˈmɛlə ɔlˈtɛlə/
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Identification
Distinguished from other Stigmella by association with specific plants (Quercus imbricaria and Q. palustris) and geographic restriction to Ohio and Maine. Leaf mines can be identified by the larval feeding traces on these oak species. are extremely small and require microscopic examination for definitive identification; dissection is typically necessary for species-level determination in this .
Appearance
Wingspan 5.6–6.4 mm. As a member of the , this is among the smallest , with exhibiting the reduced and narrow, typical of . Coloration and detailed patterning of adults are not explicitly documented in available sources.
Habitat
Associated with oak woodlands and forests where trees Quercus imbricaria (shingle oak) and Quercus palustris (pin oak) occur. The occupies the and foliage of these oaks.
Distribution
United States: Ohio and Maine. Records indicate presence in the Nearctic region with a disjunct distribution between the Midwest (Ohio) and Northeast (Maine).
Seasonality
(one per year). In Ohio, larval mines are present in October; emerge the following May and early June. Activity period spans late autumn (larval) through late spring (adult).
Diet
feed as on Quercus imbricaria and Quercus palustris. feeding habits are not documented.
Host Associations
- Quercus imbricaria - larval shingle oak
- Quercus palustris - larval pin oak
Life Cycle
. stage not described. mine leaves of oaks in October, creating subsurface feeding tunnels. occurs within the mine or in leaf litter; emerge the following May and early June after .
Behavior
are , feeding between the upper and lower of oak leaves. are presumably or , as is typical for , though specific activity patterns are not documented.
Ecological Role
As a , contribute to diversity on oak trees and may serve as for and other . The is part of the of microlepidopterans that oak foliage.
Human Relevance
No direct economic or cultural significance documented. The is of interest to and researchers studying oak-associated .
Similar Taxa
- Stigmella castaneaefoliellaAnother North Stigmella that mines leaves of Fagaceae, but specialized on Castanea (chestnut) rather than Quercus; distinguished by association and geographic range (New York and broader northeastern distribution).
- Stigmella multispicataAn Asian established in North America that mines elm leaves (Ulmus); distinguished by (Ulmus vs. Quercus) and larger geographic range across eastern North America.
- Other Stigmella species on QuercusNumerous Stigmella mine oak leaves; definitive identification requires examination of and often larval mine , as are morphologically similar.