>>In addition to the body fossil of Kimberella, there are Precambrian traces
>>of radular scraping, distinctive of mollusks.
>>
>
>I read recently that many of the trace fossils [like feeding trails] can be
>explained as due to Cnidarians or flatworms. How late are the mollusc
>traces?
I am not sure exactly where in the late Precambrian they occur, but they
have been mentioned in various publications. I believe Radulichnus is the
ichnogenus. Dolf Seilacher has done some of the work on these.
>There are also assorted
>>fossils of uncertain affinities, including conodont-like forms, probably
>>either chordates or chaetognaths.
>
>any references for those?
Benton, Fossil Record II (I think that was the edition) cited one of the
non-euconodont groups (I forget which, possibly paraconodonts) in the
latest Vendian.
> On
>>the other hand, there are some later fossils that do not fit, such as the
>>Tully monster from the Carboniferous Mazon Creek.
>>
>
>Is there a URL for the Monster? What does it look like???
Probably there are pictures up somewhere, but I do not know. It is
soft-bodied, with an elongate trunk. I beleive the genus is Tullymonstrum.
David C.
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