Talk:Acritarch
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Age range
editWhere does the 2000-400 Ma range come from, acritarchs are present before, and after that time. —Preceding unsigned comment added by 130.238.140.203 (talk) 12:41, 9 October 2008 (UTC)
- Changed the end date to the present, from this ref [1], amongst lots of others. Mikenorton (talk) 15:18, 9 October 2008 (UTC)
- Now I've changed the start date to ~2500 Ma from this ref [2]. Mikenorton (talk) 15:23, 9 October 2008 (UTC)
- If the end date is the present, the text should mention who they are now. Albmont (talk) 20:21, 23 June 2009 (UTC)
Well, because acritarchs are not a specific biological taxon, but rather a group of fossils with unknown affinities. Anything that is organic-walled and falls within the criteria is an acritarch even today. I can think of examples that falls within that category but as soon as it is properly identified it ceases to be an acritarch. Therefore it is impossible to who they are now, they can still be anything. Hmmm, i dont think it is easy to explain this...someone else try please?
The diversity section does not actually talk about the diversity of the subject matter, it just discusses the diversity of fossils as they relate to predation, I suggest a change in the heading —Preceding unsigned comment added by 146.186.145.175 (talk) 01:42, 26 October 2009 (UTC)
3.200 million years
editthat is the Mesoarchean - is that true? -- Hartmann Schedel II (talk) 20:46, 12 August 2015 (UTC)
- If you refer to 3.2 million years ago, no, that is definitely much later. If you refer to 3,200 million years ago, that's the beginning of the Mesoarchaean. Alfa-ketosav (talk) 06:44, 14 May 2024 (UTC)
Algaebase as potential source
editAlgabase has listings of Acritarch. There are a list of genera with family incertae sedis[1] and also family Ooidiaceae with three genera[2] This might be useful to update the article.
References
- ^ Guiry, M.D.; Guiry, G.M. (eds.). "Family: Acritarcha familia incertae sedis". AlgaeBase. National University of Ireland, Galway. Retrieved 12 March 2024.
- ^ Guiry, M.D.; Guiry, G.M. (eds.). "Family: Ooidiaceae". AlgaeBase. National University of Ireland, Galway. Retrieved 12 March 2024.
— Jts1882 | talk 09:31, 12 March 2024 (UTC)
- It appears that our list comes from Fossilid.info. Can you tell if AlgaeBase has a different list?
Also just because of family incertae sedis, does not mean it is an Acritarch. A similar classification may happen with environmental DNA, or low quality preservation.Actually it is Family: Acritarcha familia incertae sedis. Graeme Bartlett (talk) 09:48, 12 March 2024 (UTC)- Algaebase has a lot of genera that aren't in the Wikipedia article. The current Fossilid.info also has quite a few genera not in the article list, presumably due to updates. The article contains about 7 genera not in Fossilid.info, which might be because they have been removed from Fossilid or because editors have added to the list without proper sourcing (this happens too often). — Jts1882 | talk 10:34, 12 March 2024 (UTC)