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Species Monsoma pulveratum - Green Alder Sawfly

sawfly larva on Alder - Monsoma pulveratum sawfly - Monsoma pulveratum - female sawfly - Monsoma pulveratum Green caterpillar  - Monsoma pulveratum Green caterpillar  - Monsoma pulveratum sawfly? - Monsoma pulveratum Insects On our Window - Monsoma pulveratum possibleWoollyAlderSawfly - Monsoma pulveratum
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hymenoptera (Ants, Bees, Wasps and Sawflies)
No Taxon ("Symphyta" - Sawflies, Horntails, and Wood Wasps)
Family Tenthredinidae (Common Sawflies)
Subfamily Allantinae
Tribe Empriini
Genus Monsoma
Species pulveratum (Green Alder Sawfly)
Synonyms and other taxonomic changes
Tenthredo limbata (Gmelin 1790)
Explanation of Names
Monsoma pulveratum (Retzius 1783)
Native to Europe. Literature records from Newfoundland (1990s), Alaska (2009). Also from Washington on BugGuide (2010).
Pest of alder
European species established in eastern Canada since the early 1990s, detected in Alaska in 2009 and Washington in 2010. Now in ten western WA counties (Clark to Whatcom). Larvae feed on alders in spring and early summer, and causes severe defoliation of Alnus tenuifolia in Alaska.