willow gall sawflies

genus Euura

Member of gall sawflies
common sawflies (family Tenthredinidae)
typical sawflies (superfamily Tenthredinoidea)
insects (class Insecta)
hexapods (subphylum Hexapoda)
arthropods (phylum Arthropoda)
animals (kingdom Animalia)

There are no other wild species of this genus in the bay area.

willow apple gall sawfly
Euura californica

willow redgall sawfly
Euura proxima

arroyo willow stem sawfly
Euura lasiolepis

willow stem sawfly
Euura exiguae

1 observed taxon / 3 unobserved taxons

Chris’s observations: 14 (none are research grade)

Locations:

Coal Creek OSP: 3
Coyote Hills RP: 2
Murray Ranch SP: 2
Sweeney Ridge National Recreation Area: 2
Bear Creek Redwoods OSP
Lake Chabot RP
San Bruno Mountain State & County Park
Sibley Volcanic RP
Waterdog Lake & Open Space

Months:

Mar.: 1
Apr.: 0
May: 0
Jun.: 1
Jul.: 2
Aug.: 4
Sep.: 4
Oct.: 1
Nov.: 1

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Taxon info: iNaturalist – BugGuide

Bay Area species: iNaturalist