Occurrence
All the recognized Opabinia specimens found so far come from the "Phyllopod bed" of the Burgess Shale, in the Canadian Rockies of British Columbia.
In 1997 Briggs and Nedin reported from South Australia a new specimen of Myoscolex which was much better preserved than previous specimens, leading them to conclude that it was a close relative of Opabinia - although this interpretation was later questioned by Dzik, who instead concluded that Myoscolex was an annelid worm.
Read more about this topic: Opabinia Regalis
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