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From: John Harshman <john.harshman@gmail.com>
Newsgroups: talk.origins
Subject: Re: Nematode fossils 15 million years older than the Cambrian
 explosion?
Date: Wed, 20 Nov 2024 08:48:15 -0800
Organization: University of Ediacara
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On 11/19/24 9:30 PM, erik simpson wrote:
> On 11/19/24 8:28 PM, John Harshman wrote:
>> On 11/19/24 6:38 PM, RonO wrote:
>>> https://www.science.org/content/article/mother-son-team-s-fossil-find-shows-how-nematodes-and-all-arthropods-arose
>>>
>>> It looks like they have found nematode fossils in the same area that 
>>> they are finding ediacaran fossils.  They think the fossils are in 
>>> sediments 15 million years older than the Cambrian explosion 
>>> diversification.
>>>
>>> They think that they represent early members of ecdysozoans. 
>>> Nematodes are protostomes, but are more closely related to arthropods 
>>> than other protostomes.  This would mean that animals like the phylum 
>>> mollusca existed or at least branched off as multicellular animals 
>>> long before their appearance and diversification during the Cambrian 
>>> explosion.
>>
>> First, of course they aren't nematodes, and the article actually 
>> suggests they're "nematode-like", i.e. stem-ecdysozoans.
>>
>> Second, Kimberella is probably either a mollusk or a 
>> stem-lophotrochozoan, so no ecdysozoan fossils are needed for that.
>>
> Do you have access to Current Biology?  I have access to Science itself, 
> and it's too bad this didn't get published there.

I don't, though a lot of it is open access. But not this one. The 
abstract does agree with the Science piece.