
1) Burgess Shale fossil
Found on
https://www.crosswordclues.com/clue/wiwaxia

Wiwaxia is a genus of soft-bodied animals that were covered in carbonaceous scales and spines. Wiwaxia fossils – mainly isolated scales, but sometimes complete, articulated fossils – are known from early Cambrian and middle Cambrian fossil deposits across the globe. The living animal would have measured up to 5 cm (2 in) when fully grown, alth...
Found on
http://en.wikipedia.org/wiki/Wiwaxia

(from the article `Burgess Shale`) ...there are many other genera that do not fit so easily into modern phyla. Such unusual fossils as Hallucigenia, a creature with a long tubular body ...
Found on
http://www.britannica.com/eb/a-z/w/46
No exact match found.