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Matting color

Beckwithia is a Cambrian arthropod in the extinct order Aglaspida, which may be related to horseshoe crabs. Surrounding these two specimens are a couple of odd mollusks known as hyolithids, which drag themselves over the sand using two arm-like structures called "helens" (named after the daughter of the man who discovered the group) that jut from either side of their operculum. The coiled blobs are fecal castings from acorn worms feeding in the sediment.


Beckwithia typa ©2014 John Meszaros.  All Rights Reserved