"Only one other organism-living or fossil-has a body design and feeding apparatus like that of Bowengriphus. The other 'Blob' is named Odontogriphus omalus. It was described in 1976 from much older (Middle Cambrian, 515 million year old) rocks in Canada."
http://www.amonline.net.au/collections/palaeontology/blob.htm
PBY, sorry, I just noticed your post. You beat me to the punch.