Isophrictis rudbeckiella
Bottimer, 1926
Isophrictis rudbeckiella is a described by Bottimer in 1926. It is recorded from the south-central and midwestern United States, with a wingspan of 11.5–16 mm. The is associated with Rudbeckia maxima, on which its develop within flowerheads.
Pronunciation
How to pronounce Isophrictis rudbeckiella: /ˌaɪsɵˈfrɪktɪs rʌdˌbɛkiˈɛlə/
These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.
Identification
Distinguished from other Isophrictis by the specific pattern of three longitudinal golden streaks on the half that converge into a V-shaped golden area before the . The combination of -tipped dark with golden markings is characteristic. Similar with streaked forewings lack the distinct V-shaped golden marking.
Images
Appearance
Small with wingspan 11.5–16 mm. covered with -tipped dark : fuscous at base, black at . Three narrow longitudinal streaks of white-tipped golden scales present—one below , one along fold, one midway between—distinct on half, becoming shorter and more numerous beyond middle, forming a V-shaped golden area toward apex. Strong edging of white-tipped black scales at apex. dark silvery fuscous.
Habitat
Associated with open supporting Rudbeckia maxima, likely including prairies, meadows, and disturbed grasslands. Specific microhabitat requirements beyond presence are not documented.
Distribution
Recorded from Alabama, Iowa, Kansas, Louisiana, Mississippi, Ohio, and Texas in the United States. GBIF records also indicate presence in Alberta, Canada.
Seasonality
active from May to August. Larval development presumably occurs during this period or shortly preceding adult .
Diet
feed on flowerheads of Rudbeckia maxima. feeding habits are not documented.
Host Associations
- Rudbeckia maxima - larval feed on flowerheads; occurs within burrow or upper stem
Life Cycle
develop within flowerheads of Rudbeckia maxima. occurs either within the larval burrow in the flowerhead or in the upper part of the stem. emerge from May to August.
Behavior
are internal feeders within Rudbeckia flowerheads. No other behaviors are documented.
Ecological Role
As a on Rudbeckia maxima, likely contributes to flowerhead damage and seed in . Specific impacts are not quantified.
Human Relevance
No documented economic or agricultural significance. Potential minor impact on ornamental Rudbeckia plantings through flowerhead damage.
Similar Taxa
- Other Isophrictis speciesShare general and streaked patterns, but differ in specific arrangement and coloration of markings; I. rudbeckiella is distinguished by the V-shaped golden area and three
- Other Gelechiidae with streaked forewingsMay resemble general pattern, but lack the specific golden streak and V-shaped marking combination; association with Rudbeckia maxima provides additional distinguishing context
More Details
Taxonomic history
Described by Bottimer in 1926; no subsequent taxonomic revisions or synonymy recorded in available sources.
Observation frequency
55 observations recorded on iNaturalist as of source date, suggesting it is infrequently encountered or underreported relative to its range.