Peronopsis interstricta (White, 1874).
Small piece of grey shale. On the upper surface there are 17 Agnostids. Five of these are co0mplete positives. The other 12 are negatives. Nice preservation and detail.
Middle Cambrian, Wheeler Shale Formation.
House range, Millard County, USA.
Specimen : 11 x 6.4 x 1 cm.
