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#14954
Helgramite - Corydalus cornutus

Helgramite - Corydalus cornutus
Raleigh, Wake County, North Carolina, USA
April 7, 2005
Size: 80 mm
Dr. John Meyer of North Carolina State University captured several of these in a clear stream in suburban Raleigh on 4/7/05. (Clear streams are uncommon in the Piedmont--this one is below an old mill pond--the discharge is clear and well-oxygenated.) He had brought them for a demonstration at a "Bioblitz", and was kind enough to help me take photographs. This was the largest of his several specimens, and he believes this is as large as they get. In a deep water pan, the Helgramite makes constant movements of its abdomen, apparently in order to circulate water over its external gills. These are visible in this photo, projecting in tufts out from the abdomen. Truly an impressive creature.

Images of this individual: tag all
Helgramite - Corydalus cornutus Helgramite - Corydalus cornutus