1) Burgess Shale animal
Found on
https://www.crosswordclues.com/clue/halwaxiida
Halwaxiida or halwaxiids is a proposed clade equivalent to the older orders Sachitida He 1980 and Thambetolepidea Jell 1981, loosely uniting scale-bearing Cambrian animals, which may lie in the stem group to molluscs or lophotrochozoa. Some palaeontologists question the validity of the Halwaxiida clade. ==Definition and members== Other fossil orga...
Found on
http://en.wikipedia.org/wiki/Halwaxiida
No exact match found.
