About 15mm long.
No interactions present.
Hi jonmortin. It's distinctive with smooth elytra, rounded and slightly domed front edge to pronotum and protruding head. I've found both this and S.tristis in pitfall traps last week.
BMIG website: www.bmig.org.uk (centipedes, millipedes & woodlice)
BMIG Newsletters ~ www.bmig.org.uk/view/resource/bmig-newsletter
BMIG Bulletins ~ www.bmig.org.uk/view/resource/bmig-bulletin
Having found S.tristis at the same site last week, I am amazed to have now found this as it is also quite rare (or maybe under-recorded) in our area.
As commented above I had both at the same site at same time too. First time I'd seen S.laevigata, and I caught several of them.
Lat/Lng: 51.47384, -2.57592
OS grid ref: ST600751