Christian Owen's picture

Flat-backed Millipede

Observed: 11th March 2013 By: Christian OwenChristian Owen’s reputation in InvertebratesChristian Owen’s reputation in InvertebratesChristian Owen’s reputation in InvertebratesChristian Owen’s reputation in Invertebrates
Polydesmus testaceus
Description:

Seen in large numbers here, easily found under builders rubble etc. Strangely, i've only found one other Millipede spp at this particular site and that's Nanogona polydesmoides.

Identifications
Species interactions

No interactions present.

Comments

stevegregory's picture

No doubt - even from photo!

Hi Christian,

A very nice find. This species is distinct from other 'Polydesmus' in having a smoothly curved edge to the paranota, and the dorsal surface is relatively smooth and shiny (thus even a female can be identified!). In 'true' Polydesmus the paranota have ragged, or toothed, edges, and often have distinct tubercles on the dorsal surface.

see: http://www.bmig.org.uk/gallery/47/73

Steve

Christian Owen's picture

Cheers Steve. :)

Seems they have been accidentally introduced to this site from builders rubble being tipped here. Not as yet found them outside this small area...hoping they do spread before the powers that be decides to improve this area.

Two other interesting species can also be easily found here...An Harvestman - Sabacon viscayanum ramblaianum and The Ghost Slug - Selenochlamys ysbryda

Regards Chris...

stevegregory's picture

P. testaceus favours dry

P. testaceus favours dry calcareous sites, so geology could limit their spread?

I've yet to find The Ghost Slug! I'll have to keep looking..........