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Narceus sp? - Paeromopus angusticeps

Narceus sp? - Paeromopus angusticeps
Marin County, California, USA
April 12, 2008
Size: 5" (12.5cm)
This is the longest millipede I've ever found. The size listed is not an exaggeration - my knuckle is 3" across and the millipede not only spans that (at an angle), but also comes back to my middle finger, which is another couple of inches. I was stunned when I found it and realized it was just one individual. Strangely, however, it wasn't very thick, and I had found many (shorter) millipedes earlier that day with greater girth.

Images of this individual: tag all
Narceus sp? - Paeromopus angusticeps Long Millipede - Paeromopus angusticeps Long Millipede - Paeromopus angusticeps Long Millipede - Paeromopus angusticeps


Moved from Spirobolidae.

I know this one well, another
I know this one well, another representative of the Paeromopodidae, order Julida. This one is Paeromopus angustatus angustatus. Can't think of the author right now. Rowland Shelley

Thanks for the identification!

Moved from Spirobolida.

Rowland Shelly has told me these are a species of Tylobolus.
i am assuming Contra Costa Co and Marin Co have the same species or at least genus

Great. I couldn't find any other Tylobolus on the google image search except one image with a question mark here.

Longest Millipede
Wow, that's a dandy. I found a reference to the longest North American Millipede, and it's Paeromopus paniculus also found in California. Perhaps that's what this is? See Kansas School Naturalist about half way down the page.

Re: Longest Millipede
Thank you for the reply, Lynette. Paeromopus paniculus (or a related species) sounds like it could be a possibility. I think it is possible, however, that some of the species in this genus are widely distributed in California and can be found in the same area; this page describes how an intergrade between Paeromopus buttensis and Paeromopus augusticeps was found in Sonoma County (Sonoma is the only county with which Marin shares a border).

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