Profenusa alumna

(MacGillivray, 1923)

red oak leaf-mining sawfly

Profenusa alumna is a leaf-mining in the Tenthredinidae. It is , completing one per year. Larvae feed as leaf miners within red oak leaves, creating blotch mines. The is closely associated with red oak (Quercus rubra) in forested . occurs in soil.

Profenusa alumna by (c) Mathew* Zappa, some rights reserved (CC BY), uploaded by Mathew* Zappa. Used under a CC-BY license.

Pronunciation

How to pronounce Profenusa alumna: /proʊˈfiːn.jʊ.sə əˈlʊm.nə/

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Identification

Profenusa alumna can be distinguished from other oak-feeding by its specific association with red oak (Quercus rubra) and its blotch leaf-mining habit. Accurate identification requires examination of morphological characters and is confirmed by molecular diagnostics or rearing from material. Similar Profenusa may differ in host preference and mine type.

Images

Habitat

Forests containing red oak (Quercus rubra). Larval development occurs within leaf tissue; takes place in soil.

Distribution

Recorded from Canada (Alberta, British Columbia) and Belgium. Distribution corresponds with the range of its , red oak (Quercus rubra), suggesting a broader North American presence.

Seasonality

emerge in spring. One per year ().

Diet

Larvae feed on red oak (Quercus rubra) leaf tissue as internal leaf miners.

Host Associations

Quercus rubra - larval Red oak; sole documented for larval feeding and development

Life Cycle

. emerge in spring. Females insert into oak leaf tissue. Larvae feed as leaf miners, creating blotch mines. occurs in soil.

Behavior

Leaf-mining creates blotch-type mines in oak leaves. Larvae develop entirely within leaf tissue.

Ecological Role

Herbivore and on red oak. Functions as a component of oak forest ; potential pest significance in managed or ornamental oak settings.

Human Relevance

Potential pest of red oak in forestry or ornamental contexts due to leaf-mining damage. Documented as subject of research in economic entomology literature.

Similar Taxa

Other Profenusa speciesSimilar and ; distinguished by specificity and mine characteristics
Other Tenthredinidae leaf minersSimilar feeding habit; require morphological examination or molecular identification for differentiation

More Details

Taxonomic Status

Listed as synonym of Profenusa thomsoni in some databases; accepted as valid in other sources. Taxonomic resolution may require further study.

Research Significance

Subject of study published in Journal of Economic Entomology, indicating interest for forest pest management and basic of oak-associated herbivores.