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 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


TaxonomyBrowseInfoImagesLinksBooksData
Photo#1514755
Timema monikense - Timema chumash - male - female

Timema monikense - Timema chumash - Male Female
Santa Monica Mountains, Ventura County, California, USA
April 4, 2018
Size: ~20-30mm
Found on Ceanothus cuneatus and Adenostoma fasciculatum. Of the 9 found, 3 were males, and 6 were females.

Images of this individual: tag all
Timema monikense - Timema chumash - male - female Timema monikense - Timema chumash - male - female

Moved
Moved from Timema monikense.

Fascinating find, Alice!
The terminalia of the male are closer in form to those of T. monikense than to any other species appearing in the reference figure from Vickery & Sandoval(2001). In particular, the sinistral cercus has an obliquely-truncate distal edge (on the interior side of it's outer fork), and a very large, "tooth-like" flange lower down on its inner side.

It's interesting to not only see the male (in a species that's presumed to be parthenogenetic)...but to also see him mate-guarding a female, as is typical behavior in sexually-reproducing species. I would think that mate-guarding behavior would pre-suppose actual mating...raising questions about the nature of parthenogenesis in this species, and how often parthenogenesis may be supplemented by sexual interactions (e.g. involving copulatory behavioral & genetic interchange with males)?

I wonder if either of the other two males you found were mate-guarding?

 
ID
Based on http://www.sfu.ca/biology/faculty/crespi/pdfs/125-Schwander&Crespi2009.pdf male T. monikense actually belong to a disjunct population of T. chumash which co-occurs with the parthenogenic T. monikense. The females from this location also look to be T. chumash based on the shape of the subgenital plate. Just to make Timema more complicated!!!

Moved
Moved from Timema.

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