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

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama

Photos of insects and people from the 2011 gathering in Iowa

Photos from the 2010 Workshop in Grinnell, Iowa

Photos from the 2009 gathering in Washington

TaxonomyBrowseInfoImagesLinksBooksData
Photo#485644
Rhopalomyia baccharis gall - Rhopalomyia baccharis

Rhopalomyia baccharis gall - Rhopalomyia baccharis
Carpinteria Salt Marsh, Santa Barbara County, California, USA
January 17, 2011
Size: length ~8 cm
I came across another Rhopalomyia baccharis gall at the Carpinteria salt marsh today. This one was much newer than the very old, dried gall I previously photographed, though this one had an interesting abrupt transition in the middle, where it went from being green in the proximal part of the gall to being brown in the distal half. Maybe the gall did something to kill the stem at that point?

This image shows most of the gall. You can see the thin stem where it joins with the main part of the plant (coyote brush, Baccharis pilularis) near the top of the image. Then the stem comes toward the camera, turns downward, then curves back toward the camera in the lower right part of the image.

I was able to get a good view of one of the curious lens-shaped exit holes that Russo talks about in his description of the species in Field Guide to Plant Galls.

Images of this individual: tag all
Rhopalomyia baccharis gall - Rhopalomyia baccharis Rhopalomyia baccharis gall - Rhopalomyia baccharis Rhopalomyia baccharis gall - Rhopalomyia baccharis