Phyllonorycter tiliacella
(Chambers, 1871)
Basswood Round-blotch Miner Moth
Phyllonorycter tiliacella is a small leaf-mining in the Gracillariidae. The larvae create distinctive tentiform mines on the upper surfaces of basswood (Tilia) leaves, appearing white with dense dark brown speckling. The has a with different pupal strategies for summer and winter .
Pronunciation
How to pronounce Phyllonorycter tiliacella: //fɪl.oʊˈnɒr.ɪk.tər ˌtɪ.li.əˈsel.ə//
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Identification
Distinguished from other Phyllonorycter by plant association with Tilia species and the specific mine : upper-surface tentiform mine with dense dark brown speckling on white background. The mine shape is round-blotch rather than linear. Separation from P. lucetiella, another Tilia-feeding , requires examination of genitalia or detailed mine characteristics.
Appearance
A minute with wingspan approximately 6-8 mm. are typical of the Phyllonorycter: small with narrow, wings held roof-like over the body at rest. Coloration is generally pale with subtle patterning, though specific markings are not well documented in available sources. The larval mine is the most conspicuous visible feature: a white, tentiform blotch on the upper leaf surface densely speckled with dark brown .
Habitat
Deciduous forests and urban areas where basswood (Tilia americana) and related linden occur. The is closely tied to its plant distribution.
Distribution
Eastern North America: Canada (Québec, Ontario) and United States (Illinois, Kentucky, New York, Maine, Vermont, Connecticut). Records suggest a range centered in the northeastern and north-central United States with extension into adjacent Canadian provinces.
Seasonality
with two periods. Summer pupates in a slight silken web; winter brood overwinters as pupa in a denser cocoon attached above and below. Specific flight months are not documented in available sources.
Diet
Larvae feed exclusively on Tilia , including Tilia americana (American basswood). They mine the leaves, feeding on mesophyll tissue between upper and lower . do not feed; their mouthparts are reduced or non-functional.
Host Associations
- Tilia americana - obligate larval primary ; larvae mine leaves
- Tilia - larval -level association
Life Cycle
Complete with . laid on Tilia leaves. Larvae mine leaves, creating upper-surface tentiform mines. First pupates in summer in slight silken web; second generation overwinters as pupa in denser cocoon attached to substrate. emerge to mate and oviposit on new foliage.
Behavior
Larvae are endophytic leaf miners, remaining concealed within leaf tissue throughout feeding period. Pupae of summer are suspended in minimal silk; winter brood constructs more substantial protective cocoon. are likely and attracted to light, as is typical for the , though specific adult is not documented.
Ecological Role
Primary consumer as ; contributes to nutrient cycling through leaf tissue processing. Serves as prey for and other natural enemies of leaf-mining Lepidoptera. impacts on trees are generally minor and not considered ecologically significant.
Human Relevance
No significant economic or medical importance. Occasionally noticed by naturalists and entomologists due to conspicuous leaf mines. Not a pest of cultivated lindens in ornamental settings, though mines are visually apparent.
Similar Taxa
- Phyllonorycter lucetiellaAlso feeds on Tilia; requires genitalia examination or detailed mine analysis for separation
- Other Phyllonorycter speciesMany create similar tentiform mines; plant specificity is primary distinguishing character
More Details
Mine morphology
The upper-surface tentiform mine with dense dark brown speckling is diagnostic among North American Phyllonorycter on Tilia. Lower-surface mines are created by some but not this species.
Nomenclature
The specific epithet 'tiliacella' directly references the Tilia, following the convention of many Phyllonorycter names.