No identification made yet.
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Definitely Oxychilus but size would help to establish further id. O.alliarius also normally emit a strong garlic smell if disturbed.
Looks like O.draparnaudii (a big species with bright blue body), but size indication would be useful. And when prodded does it small of garlic? O.alliarius will blow your head off, O.navarricus just a slight whiff.
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
Size about 1.5 cm. Will try to find another and prod it!
At 15mm O.draparnaudii is most likely (to 16mm). Considering the blue body and relatively 'flared' last shell whorl, this is my favoured option. However, O.cellarius (which looks somewhat similar) can exceptionally reach 14mm.
If your measurement is reasonably accurate O.alliarius (to 7mm) & O.navarricus (to 10mm) can be ruled out.
Lat/Lng: 53.3, -1.3
OS grid ref: SK5285