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

Interested in a 2022 BugGuide gathering in New Mexico?

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

National Moth Week 2020 photos of insects and people.

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27

Discussion, 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

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

Previous events

1215a - Ptenothrix

1215a - Ptenothrix
Finn Hill Park Kirkland, King County, Washington, USA
March 12, 2016
Size: ~5mm
Found at edge of pond.

Images of this individual: tag all
1215a - Ptenothrix 1215a - Ptenothrix


Could be Dicyrtoma else Ptenothrix.
Do you have a frontal shot in which we can see the midfacial setae?
And a lateral shot in which we can see the shape of the small abdomen?

Hi, Thanks for narrowing i

Thanks for narrowing it down. All shots were taken from above, but I added one where you can see more hairs on the face because the critter is looking upwards. I could try to go back and get some more pics from different angles. However, I'm sure you realize how tough it is to shoot stuff this small.

Thank you!

Ptenothrix sp. new
Thx for adding the extra shot. It is definitely Ptenothrix. New species. We have it currently at with tentative name Ptenothrix sp.3.

Very cool. I will likely go b
Very cool. I will likely go back and try to get more pictures of other collembola. In general will it be hard to ID with a shot from above? That is infinitely easier to shoot with my set up than from the side.

The thing is...
we can ID them by comparing the dorsal pattern with other specimens of which we know already the ID. But there is a lot of infraspecific variability of patterns... E.g. females and males (may) have a different pattern. Also juveniles (may) have different patterns. As a general rule each instar has its own pattern. Given 5 juvenile and 5 adult male and 10 adult female instars are usually present, you end up with 10 different patterns for male and 15 patterns for female specimens. To sex a specimen we need a lateral shot in which the small abdomen is in focus. But do not worry about this. Dorsal shots are fine to ID specimens on habitus shots based on an educated guess. ;-)

Moved for expert attention
Globular Springtail. Moved from ID Request.

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