Halwaxiida — taxobox image caption= Halkieria regnum=Animalia fossil range=Early to Middle Cambrian superphylum=Lophotrochozoa phylum = See text Halwaxiida or halwaxiids is a proposed clade loosely uniting scale bearing Cambrian animals, which may lie in the… … Wikipedia
Debate about Cambrian Lophotrochozoans — Since 1990 there has been intense debate among paleontologists about the evolution in the Early Cambrian period of the super phylum Lophotrochozoa, which is thought to include the modern molluscs, annelid worms and brachiopods, as well as their… … Wikipedia
Mollusca — Temporal range: Cambrian–Recent … Wikipedia
Burgess shale type fauna — A number of assemblages bear fossil assemblages similar in character to that of the Burgess shale. While many are also preserved in a similar fashion to the Burgess shale, the term Burgess shale type fauna covers assemblages based on taxonomic… … Wikipedia
Halkieria — Taxobox name = Halkieria fossil range = fossil range|533|511|Lower to Middle Cambrian image title = Halkieria evangelista from the Lower Cambrian Sirius Passet, North Greenland regnum = Animalia phylum = ?Mollusca unranked ordo = Halwaxiida… … Wikipedia