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Euura
Euura is a genus of sawflies of the family Tenthredinidae, subfamily Nematinae. Some of the larvae feed externally on plants and some form plant galls on willows (Salix species). In the case of the gall-forming species, when the female lays her eggs she injects a stimulant and the gall starts to form before the eggs hatch. Most sawfly galls are hard and individual larva tend to inhabit the gall, feeding on the tissue and leave the gall to pupate in the soil. Most of the species are monophages (i.e., specific to one species of willow) although the type species, Euura mucronata, is polyphagous feeding on over thirty species of willow.
Most groups of insects tend to have maximum numbers of species in the tropics and decrease towards the poles. The Nematinae reverse this trend with the highest number probably occurring in the boreal forest zone. The reason is not fully understood but could be because of the abundance of species of willow in the region. In the Western Palaearctic all of the species of Euura are attached to Salix species as hosts for their larva. Reports of European species of stem-galling Euura, galling poplar (Populus species) remain unconfirmed, although at least five species in North America do gall poplars.
60 branches of this genus, most-observed first
Willow Apple Gall Sawfly
speciesEuura californica
Willow Redgall Sawfly
speciesEuura proxima
Euura viminalis
complexEuura viminalis
Imported Currantworm
speciesEuura ribesii
Lesser Willow Sawfly
speciesEuura pavida
Locust Sawfly
speciesEuura tibialis
Willow Sawfly
speciesEuura ventralis
Sallow Bean-gall Sawfly
speciesEuura bridgmanii
Army Willow Nematine
speciesEuura miliaris
Willow Nematine
speciesEuura salicis
Willow Stem Sawfly
speciesEuura exiguae
Arroyo Willow Stem Sawfly
speciesEuura lasiolepis
Papillose Nematine
speciesEuura papillosa
Euura salicisnodus
speciesEuura salicisnodus
Euura oblita
complexEuura oblita
Euura vittata
complexEuura vittata
Euura salicispomum
speciesEuura salicispomum
Bergmann’s Willow Nematine
speciesEuura bergmanni
Euura viduata
complexEuura viduata
Vetchling Nematine
speciesEuura myosotidis
Black-horn Nematine
speciesEuura nigricornis
Dark-headed Nematine
speciesEuura melanocephalus
Green Alder Nematine
speciesEuura glutinosae
Euura virilis
speciesEuura virilis
Yellow-bellied Nematine
speciesEuura hypoxantha
Splendid Birch Nematine
speciesEuura ampla
Spiraea Sawfly
speciesEuura spiraeae
Immaculate Willow Nematine
speciesEuura oligospila
Cryptic Willow Nematine
speciesEuura respondens
Flamboyant Willow Nematine
speciesEuura histrio
Shielded Spruce Nematine
speciesEuura scutellata
Shouldered Willow Nematine
speciesEuura humeralis
Long-sawed Willow Nematine
speciesEuura longiserra
Almond-leaved Bean-galler
speciesEuura triandrae
Euura salicispisum
speciesEuura salicispisum
Flawed Larch Nematine
speciesEuura imperfecta
Yellowheaded Spruce Sawfly
speciesEuura alaskensis
Pale Gooseberry Nematine
speciesEuura leucotrocha
Dark-winged Nematine
speciesEuura caeruleocarpus
Marbled Birch Nematine
speciesEuura poecilonota
Euura petiolaridis
speciesEuura petiolaridis
Euura punicea
speciesEuura punicea
Saddleback Grass Nematine
speciesEuura clitellata
Green Birch Nematine
speciesEuura viridis
Euura consors
speciesEuura consors
Proximal Dock Nematine
speciesEuura vicina
Cadder’s Birch Nematine
speciesEuura cadderensis
Euura lipovskyi
speciesEuura lipovskyi
Rusty Willow Nematine
speciesEuura ferruginea
Euura retusae
speciesEuura retusae
Disparate Birch Nematine
speciesEuura dispar
Thighed Leaf-galler
speciesEuura femoralis
Euura salicisovulum
speciesEuura salicisovulum
Euura popuella
speciesEuura popuella
Euura stenogaster
speciesEuura stenogaster
Annulate Dock Nematine
speciesEuura annulata
Euura sylvestris
speciesEuura sylvestris
Sallow Bud-galler
speciesEuura mucronata
Euura gracilis
speciesEuura gracilis
Euura salicisovum
speciesEuura salicisovum
Where it lives
Recorded sightings
—
geo-referenced records in GBIF, from museums, herbaria and field observers.
Drag the globe to turn it. Dots are where records exist, not a range map; darker means more records.
In the stacks
Searching the stacks…
Every page naming Euura in the Biodiversity Heritage Library →
This page is assembled live from iNaturalist, GBIF, Wikipedia, the Source Library and the Internet Archive. It is not yet part of the hand-edited codex. iNaturalist taxon 334169.