manzanita leafgall aphid

Tamalia coweni

Member of ericaceous gall aphids (genus Tamalia)
gall aphids
aphids (family Aphididae)
plant-parasitic hemipterans (suborder Sternorrhyncha)
insects (class Insecta)
hexapods (subphylum Hexapoda)
arthropods (phylum Arthropoda)
animals (kingdom Animalia)
bearberry and manzanita galls
galls

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• forms on midribs or edges of leaves of many species of bearberries and manzanitas (genus Arctostaphylos), including bearberry (Arctostaphylos uva-ursi), but not big berry manzanita (Arctostaphylos glauca)
• galls cause significant swelling and distortion of the leaf edge
• compare to Exobasidium arctostaphyli, which causes only a minor blister

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Chris’s observations: 8 (1 is research grade)

Locations:

• Ansel Adams Wilderness: 6
• El Sereno OSP
• Mt. Diablo SP

Months:

• Sep.: 6
• Oct.: 0
• Nov.: 1
• Dec.: 0
• Jan.: 1

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Taxon info: iNaturalist – BugGuide – Gallformers

Bay Area species: iNaturalist