Description

Middle Cambrian

Wheeler Shale

Millard County, Utah, USA

Extremely rare, 36mm arachnomorph arthropod on 115mm slab. First we have seen.

Arthropod,

Nettapezoura is a genus of arthropods that may belong to a group more ancient and perhaps ancestral to trilobites.  It also appears that Sidneya, a rare arthropod of the Burgess Shale, is the closest-known relative of Nettapezoura.

See:

Hendricks, J. R. & Lieberman, B. S.  2008.

New phylogenetic insights into the Cambrian radiation of arachnomorph arthropods. Journal of Paleontology, 82(3): 585-594.