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

Upcoming Events

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

National Moth Week was July 23-31, 2022! See moth submissions.

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

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

Previous events

Ant ID please - Colobopsis impressa

Ant ID please - Colobopsis impressa
Ascension Parish, Louisiana, USA
June 9, 2007
Size: ~6mm

Images of this individual: tag all
Ant ID please - Colobopsis impressa Ant ID please - Colobopsis impressa Ant ID please - Colobopsis impressa Ant ID please - Colobopsis impressa Ant ID please - Colobopsis impressa


Camponotus impressus
When I have workers to key out, the strikingly tan-striped ones always end up at C. (Colobopsis) impressus, and the details of the face on this also look right for that one.

The genus/subgenus business is a bit arbitrary, especially pending a sweeping, higher level, systematic revision of Camponotus world wide. It is the most widely distributed and probably the most species-rich ant genus in the world, so this will be no mean task.

Moved from Carpenter Ants.

Moved to Camponotus as taxonomy still seems unsettled and this would be a conservative placement.

or Camponotus (Colobopsis), if you prefer. I recognized it from my copy of The Ants of Ohio, but Coovert applies the name Colobopsis as a genus, rather than a subgenus of Camponotus. He states some pretty good (in my opinion) reasons for the usage of Colobopsis as a genus. I'll post to the Taxonomy forum. Queens and majors are readily identifiable, having this distinctive head shape.

an email to Gordon, who will hopefully clarify.
For those who are not aware, this is what the plug shaped head is for.

At this point the proper plac
At this point the proper placement of these ants is up in the air. Sadly I do not know them well enough to put a species on this one.

I Remember These!
I remember seeing something on TV about these and what the shape of the head is used for although I forgot the name of them and I had no idea that these lived in the USA.

C. impressa
Colobopsis has recently been elevated to genus level, on genetic grounds, as well as morphological. Bugguide will soon reflect this change. This is Colobopsis impressa, as already stated, apparently the most widely distributed North American species. There are about six species of Colobopsis in the USA, one ranging as far north as Maryland to and Illinois.

The term you're looking for, Brittanie, is phragmosis. There are also some other ants with phragmotic major workers in the US, in another mainly tropical group, the myrmicine genus Cephalotes.

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