big berry manzanita leafgall aphid

Tamalia glaucensis

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 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
• more info in this paper [HTML].

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Chris’s observations: 7 (6 are research grade)

Locations:

• Santa Teresa CP: 3
• Almaden Quicksilver CP
• Calero CP
• Lexington Reservoir CP
• Rancho Cañada del Oro OSP

Months:

• Dec.: 1
• Jan.: 0
• Feb.: 0
• Mar.: 0
• Apr.: 2
• May: 3
• Jun.: 1

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Taxon info: iNaturalist – Gallformers

Bay Area species: iNaturalist