Zeiraphera unfortunana
Powell, 1983
Purple-striped Shootworm Moth, purplestriped shootworm
Zeiraphera unfortunana is a to and subarctic regions of North America. The are specialized feeders on coniferous trees, particularly spruce and fir species, where they develop in shoots and . The species was described by Powell in 1983 and is one of several Zeiraphera species known as 'budworms' or 'shootworms' due to their larval feeding habits.
Pronunciation
How to pronounce Zeiraphera unfortunana: //ˌzaɪrəˈfɪərə ˌʌnfɔːrˈtʃuːnænə//
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Identification
The can be distinguished from related Zeiraphera by genitalic characters and subtle pattern differences; precise identification typically requires dissection and comparison with described specimens. The 'purple-striped shootworm' refers to larval coloration, though this trait alone is insufficient for species-level identification within the .
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Habitat
and subarctic coniferous forests, particularly stands of spruce and fir. develop within the shoots and of trees.
Distribution
North America: Nova Scotia, Ontario to British Columbia, Yukon, Alaska, Michigan, and Minnesota.
Diet
feed on Picea glauca ( spruce), Picea engelmannii (Engelmann spruce), Picea sitchensis (Sitka spruce), Abies balsamea (balsam fir), Abies lasiocarpa (subalpine fir), and Abies amabilis (Pacific silver fir).
Host Associations
- Picea glauca - larval foodplant spruce
- Picea engelmannii - larval foodplantEngelmann spruce
- Picea sitchensis - larval foodplantSitka spruce
- Abies balsamea - larval foodplantbalsam fir
- Abies lasiocarpa - larval foodplantsubalpine fir
- Abies amabilis - larval foodplantPacific silver fir
Ecological Role
As a on coniferous trees, may influence shoot growth and development. and ecological impacts have not been quantitatively studied.
Human Relevance
The has not been documented as a significant forestry pest, unlike some such as Zeiraphera diniana (Larch Budmoth).
Similar Taxa
- Zeiraphera dinianaSimilar larval habits as a conifer-feeding shootworm, but restricted to larch (Larix) rather than spruce and fir; distinguished by association and genitalic characters.
- Zeiraphera griseanaAnother congeneric shootworm with overlapping geographic range; distinguished by preferences and subtle morphological differences.
More Details
Taxonomic note
The specific epithet 'unfortunana' is unusual and its etymology has not been formally published; it may reflect the difficulty of distinguishing this from .