Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
 

Register · Log In
HomeGuideID RequestRecentFrassForumsDonateHelp
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Calendar
Upcoming Events

Registration is open for the 2024 BugGuide gathering in Idaho July 24-27

Moth submissions from National Moth Week 2023

Photos of insects and people from the 2022 BugGuide gathering in New Mexico, July 20-24

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27

Photos of insects and people from the 2018 gathering in Virginia, July 27-29


Previous events
TaxonomyBrowseInfoImagesLinksBooksData
Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Flies (Diptera) » "Nematocera" (Non-Brachycera) » Gnats, Gall Midges, and March Flies (Bibionomorpha) » Fungus Gnats and Gall Midges (Sciaroidea) » Gall Midges and Wood Midges (Cecidomyiidae) » Gall Midges (Cecidomyiinae) » Lasiopteridi » Dasineurini » Rabdophaga » Willow Pinecone Gall Midge (Rabdophaga strobiloides)
Photo#738161
Rabdophaga? - Rabdophaga strobiloides
Copyright © 2013 Tom Klein

Rabdophaga? - Rabdophaga strobiloides
Pheasant Branch Conservancy, Middleton, Dane County, Wisconsin, USA
January 15, 2013
Size: ~25mm long
This looks to me like it should be R. salicisstrobiliscus, but the twig beneath the gall is definitely recurved (compare the key in (1)), as it was with almost every other similar gall (one exception being this one). The curves were sometimes close to the gall, as in this one, sometimes up to 15mm or so away, and anywhere from a slight to a complete double back curve.
tag · login or register to post comments
Contributed by Tom Klein on 15 January, 2013 - 7:11pm
Last updated 31 December, 2013 - 10:20am

Moved
Moved from Rabdophaga.
Actually, I changed my mind. Other than the bent twig, this looks just like the one you linked to above. The key in Walsh (1864)) makes clear that the leaves should all be triangular in R. salicisstrobiliscus, and pointed leaves near the tip of the gall do not rule out R. strobiloides. A pinecone-like gall with rounded leaves is R. strobiloides, unless it is tiny (5-10 mm long) AND the twig beneath the gall is recurved.
… Charley Eiseman, 16 January, 2013 - 3:33pm login or register to post comments

 
Recurved twig
I agree R. strobiloides fits better with the mostly rounded leaves, but it's interesting that Gagne's key specifically states "twig below gall straight" for strobiloides, whereas almost all of these had a definite recurved twig. Thanks!
… Tom Klein, 16 January, 2013 - 9:54pm login or register to post comments

Moved
Moved from Unidentified Galls.
I agree that R. salicisstrobiliscus seems to be the best match, but I suppose we should leave it at genus level for now since it doesn't match perfectly.
… Charley Eiseman, 16 January, 2013 - 3:14pm login or register to post comments

Comment viewing options
Select your preferred way to display the comments and click 'Save settings' to activate your changes.

Disclaimer: Dedicated naturalists volunteer their time and resources here to provide this service. We strive to provide accurate information, but we are mostly just amateurs attempting to make sense of a diverse natural world. If you need expert professional advice, contact your local extension office.

Contributors own the copyright to and are solely responsible for contributed content.
Click the contributor's name for licensing and usage information.
Everything else copyright © 2003-2024 Iowa State University, unless otherwise noted.

Bugguide is hosted by:

Plant Pathology, Entomology and Microbiology at Iowa State University logo

Printer Friendly Version 		Terms of Use
Privacy Statement
Site Map
Contact