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
BugGuide Gathering
Smoky Mountains
University of Tennessee Biological Field Station
August 8-10, 2008
Details...
 
Photos from the last gathering (Minnesota 2007)

TaxonomyBrowseInfoImagesLinksBooksData
Photo#168639
Unknown apterygote - Tricholepidion

Unknown apterygote - Tricholepidion
Fair Oaks, Sacramento County, California, USA
December 28, 2007
Size: about 12 mm sans cerci
Found under a log. Well it looked like a skinny, yellow silver*fish but I'll be darned if I know what it really is. I noticed no eyes and it didn't seem to mind a moist environment. It was quite active but not skittish like a silver*fish.

Images of this individual: tag all
Unknown apterygote - Tricholepidion Unknown apterygote - Tricholepidion Unknown apterygote - Tricholepidion Unknown apterygote - Tricholepidion Unknown apterygote - Tricholepidion Unknown apterygote - Tricholepidion Unknown apterygote - Tricholepidion Unknown apterygote - Tricholepidion Unknown apterygote - Tricholepidion Unknown apterygote - Tricholepidion

Moved
Moved from Tricholepidiidae.

Moved
Moved from Apterygota.

Tricholepidion
Awesome find. I think this is one of the most primitive Silverfish and it is endemic to California! It should be Tricholepidion gertschi (the only described species of thisgenus and family). They should have 5 segmented tarsi. Keep it in alcohol, it is nothing you find everyday!

 
Nicoletiinae
I'm going to have to respectfully disagree with that identification based on the images seen on

http://www.palaeos.com/Invertebrates/Arthropods/Insecta/Insecta2.htm

The short cerci seem a better fit for this strange group of thysanurans. Also, this specimen seems to lack ocelli and have 3-segemnted tarsi. Neat find. My Peterson guide says the family is only known from Florida and Texas.

 
Cerci longer
I think the cerci were longer and were broken off. It is in alcohol now but I had it in with a camel cric*ket that might have kicked it around some, snapping the ends off the circi. Either way, it sounds like a neat find. I keep specimens in case others want them so I would be happy to send this to someone if they pay the shipping.

 
:)
I did a little more research using Neartica's species list and google. Only 3 neartic species are still in this subfamily.

Texoreddellia texensis Ulrich 1902 = presumably the texan species alluded to in Peterson's

Nicoletia tergata Mills 1940 = presumably the Floridian species alluded to in Peterson's

Allonicoletia tendeiroi Mendes 1992 = type specimen from California and described after Peterson's was published

So this should be either Allonicoleta tenderoi ( < 5 tarsal segments and ocelli absent) or Tricholepidion gertschi (5 tarsal segments and ocelli present) A new family for the guide either way. Good stuff.

 
Great I agree.... I just had
Great I agree.... I just had an idea what it could be and I did not check what else is there. It might even be a new species. Not many people collect this and not many know these species....

 
We'd better dig up an authority
and have him/her inspect the specimen then.

Okay, I've just emailed Michael S. Engel who has written about these critters. I'll look for others.

 
From Michael S. Engel:
Very nice specimen. It looks like a Tricholepidion to me (Zygentoma), a very interesting group of primitive silverfish (one that I segregated into its own family, Tricholepidiidae, a couple of years ago). It is difficult to see the tarsal structure but the overall Gestalt is like that of Tricholepidion. Nice find!

 
And a later Engel comment:
It looks like an immature tricholepidiid (adults would be more darkly pigmented), although I still cannot discern the tarsal formula. The very poorly developed eyes (appear to have some pigmented areas where eyes would be in the adult) can be developmental. It would be quite interesting to confirm the tarsal formula.

 
Ahhhh, nice that he came to t
Ahhhh, nice that he came to the same conclusion... but you should really take a closer look at the number of tarsal segments...

 
I'll try two methods.
I have a 25x macrosope for viewing and I can try to shoot some distinct tarsal images at 22x and enlarge them.

 
Oh Boy!
I wondered if it could be a new family since I neither recalled nor found anything on bugguide that bore close resemblance. I found this in the vicinity of the American River on a collecting field trip with Will Chatfield-Taylor. I think we each got only a couple non-duplicate specimens that day and he's already posted his and identified them. I'll be checking his for names as I post them :-)

 
Wow!!
Wow Jim, who'd have thought it would be something so strange. I thought it was a firebrat or something like that. I did get everything of mine identified so it should all be in "your images" section on my account page! Thanks again for the collecting trip, I had a great time!

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