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First-instar Millipedes

First-instar Millipedes
Parkwood, Durham County, North Carolina, USA
February 3, 2008
Size: 0.8 mm
I found this aggregation of springtails(?) under a rotting redcedar (Juniperus virginiana) log. (Photographed with scale in another frame--not shown.) I've looked through all our springtails, and I don't see anything particularly close. In particular, I note that most have thread-like antennae, while these have rather clubbed antennae. Ideas?

Images of this individual: tag all
First-instar Millipedes First-instar Millipedes First-instar Millipedes First-instar Millipedes

the white babies
I too will follow this discussion with are my reasons why I doubt they are furcula...all the same age, no adults (all the coll. I have ever collected have every age close together)...and those troublesome antennae...good luck

Well, I doubt the furcula would matter too much. It is rudimentary or absent in a few groups.
How ever your other two points (antenna & population age-spred) make more sense to me.

In all honesty I haven't seen anything quite like them & I really what to see where this thread goes. :3
I guess in the end it doesn't matter so long as we find out what the heck they are. ^U^

You never know, it may turn out we're all wrong & that their something else entirely!

Diplopoda, apparently
Frans Janssens, in comments on some of these images posted on Flickr says he believes these are first-instar Diplopoda, so I'll move them there. I might be able to find this colony again--I wonder if it is feasible to rear them?

This has certainly been educational for me--thanks for all the help.

Well I guess that shows me, huh? XD
That's really cool, I never knew larval millipedes looked so different from the adults!

I wonder if these babies are of the order Polydesmida?

Polydesmidae looks close
To my untrained eye, the shape of the body segments, and the antennae look right for Polydesmidae. Doing a little Googling, I found a photo of an early instar myriapod, tentatively identified as Brachydesmus superus that looks close.

It is just so interesting to me that myriapods start off with six legs. I wonder if there are evolutionary implications--for instance, are hexapods basically evolved by partially arrested development of myriapods?

Not quite
Myriapoda is a sister branch to Panhexapoda (hexapods & their ancestors). However, marine panhexapod Devonohexapodus looked rather like either a shrimp or a myriapod, but with three long legs are the front.
(Sorry for the length of the url.)

I have a really great book called "Evolution of the Insects" which I strongly recommend to anyone who's interested.

You got me...
I haven't a clue WHAT they are, whether they be millipede or collembolan in nature.
They're certainly one of the most unusual things I've seen here & are definitely worth keeping around to look into.

Could these instead be juvenile Millipedes? I know that they undergo teloblastic development, meaning that they add additional segments with growth. See here:

Yes, I ran across the interesting discussion on these. My critters have prominent eyes, and all the juvenile millipedes I see in the guide here do not. Doing a little web searching, I see that millipedes do have simple eyes--Wikipedia: Millipede eyes consist of a number of simple flat lensed ocelli arranged in a group on the front/side of the head.

Looking at these images, for example:

it looks like a single simple eye, but I can't quite be sure.
Very curious--thanks for your help.

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