Path: ...!news.mixmin.net!weretis.net!feeder8.news.weretis.net!usenet.goja.nl.eu.org!nntp.terraraq.uk!news1.firedrake.org!news.eyrie.org!beagle.ediacara.org!.POSTED.beagle.ediacara.org!not-for-mail From: John Harshman Newsgroups: talk.origins Subject: Re: Nematode fossils 15 million years older than the Cambrian explosion? Date: Tue, 19 Nov 2024 20:28:06 -0800 Organization: University of Ediacara Lines: 20 Sender: to%beagle.ediacara.org Approved: moderator@beagle.ediacara.org Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Injection-Info: beagle.ediacara.org; posting-host="beagle.ediacara.org:3.132.105.89"; logging-data="62365"; mail-complaints-to="usenet@beagle.ediacara.org" User-Agent: Mozilla Thunderbird To: talk-origins@moderators.isc.org Return-Path: X-Original-To: talk-origins@ediacara.org Delivered-To: talk-origins@ediacara.org id EDE07229782; Tue, 19 Nov 2024 23:28:43 -0500 (EST) by beagle.ediacara.org (Postfix) with ESMTPS id B09E6229765 for ; Tue, 19 Nov 2024 23:28:41 -0500 (EST) by moderators.individual.net (Exim 4.98) for talk-origins@moderators.isc.org with esmtp (envelope-from ) id 1tDcKW-000000023Hr-0Idu; Wed, 20 Nov 2024 05:28:40 +0100 by egress-mx.phmgmt.com (Postfix) with ESMTP id 66433612D8 for ; Wed, 20 Nov 2024 04:28:06 +0000 (UTC) by serv-3.ord.giganews.com (Postfix) with ESMTP id DECD2443040 for ; Tue, 19 Nov 2024 22:28:06 -0600 (CST) by serv-3.i.ord.giganews.com (8.14.4/8.14.4/Submit) id 4AK4S6sh011078; Tue, 19 Nov 2024 22:28:06 -0600 X-Authentication-Warning: serv-3.i.ord.giganews.com: news set sender to poster@giganews.com using -f X-Path: news.giganews.com.POSTED!not-for-mail X-NNTP-Posting-Date: Wed, 20 Nov 2024 04:28:06 +0000 Content-Language: en-US In-Reply-To: X-Usenet-Provider: http://www.giganews.com X-Original-Complaints-To: abuse@giganews.com X-DMCA-Notifications: http://www.giganews.com/info/dmca.html X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly X-Postfilter: 1.3.40 Bytes: 3557 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.