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Piedra Falls, Mineral County, Colorado, USA
June 1, 2009
Size: ~2 mm
This is a little larger specimen from the same moss sample as an earlier image.

Images of this individual: tag all
Collembola Collembola



Thanks, Frans,
But I don't know how to move it farther than Isotomidae.

There is not currently an "Isotominae" section. I would be in favor of creating one in order to file images such as this one, but BugGuide has some vocal opponents to creation of "unnecessary" subdivisions when there are small numbers of images/taxa involved. I considered making an Isotominae page just now, but it appears that virtually all of the genera we have represented would go in that subfamily, making it (ever so slightly) more of a pain to navigate through the taxonomic tree to get to images.

To identify the genera of large size Isotominae
we need to see at least the presence/absence of the dorsal macrosetae on the body segments. Given these are are not resolved in your pictures, it is not possible to distinguish between Isotoma, Desoria, Isotomurus, Vertagopus, etc...
To make the macrosetae visible it sometimes helps to use a dark background.

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