ISPN

tmkeesey · Posted: Thu 24 Aug, 2006 6:25 pm Post subject: Definition of Eukaryota?

Have any definitions of this clade been published? It seems like a pretty good case for an apomorphy-based definition (presence of cell nucleus).

Is "Eukaryota" the best form of the name? I have also seen "Eucarya", "Eucaryota", and "Eukarya".
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David Marjanović · Joined: 24 Aug 2006 Posts: 137 Location: currently Paris

1. No idea.

2. Apomorphy looks fine.

3. No idea, except that c vs k is a matter of taste.

tmkeesey · Posted: Fri 25 Aug, 2006 11:48 pm Post subject:

I almost forgot "Eukaryotae" and "Eucaryotae".

Not sure which form was published first. FWIW, here's how Google ranks their popularity:

"Eukaryota" (4,400,000)
"Eukarya" (578,000)
"Eucarya" (177,000)
"Eukaryotae" (67,100)
"Eucaryota" (37,700)
"Eucaryotae" (777)

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T. Michael Keesey
Director of Technology, Exopolis, Inc.

leowsham · Joined: 14 Sep 2006 Posts: 69 Location: Hong Kong

Wasn't Eukaryota first coined as a rank based "domain"? I'm not sure if anyone subsequently defined it phylogenetically...
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tmkeesey · Posted: Sat 16 Sep, 2006 4:27 pm Post subject:

Yes, but it clearly refers to a clade.
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Director of Technology, Exopolis, Inc.

Phyllo · Joined: 04 Mar 2007 Posts: 1 Location: Sweden

Hi
Well, by coincidence I stumbled upon a web-page showing the reference you asked for (according to the authors of the web-page)
It was dear old Chatton that named Eukaryota in 1925. And here is the link:
http://www.algaebase.org/taxonomy.lasso?id=86701&-session=abv3:51E3526B076c73385DGUnWDD6DCF

Chatton did a really nice work in protists which he contributed in the bookseries Traite de Zoologie and the volume of dinoflagellates (unfortunately I dont read french, but there is always pictures;-)

if you dont look the web-page up: here it comes:
"Original publication: Chatton, É. (1925). Pansporella perplexa, amoebiens à spores protégées parasite de daphnies. Réflections sur la biologie et la phylogénie des protozoaires. Annales des Sciences Naturelles, Zoologie, Série 10 8: 5-84."
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tmkeesey · Posted: Thu 05 Apr, 2007 5:27 am Post subject:

Thanks for the link. Well, looks like "Eukaryota" wins by popularity and priority.
_________________
T. Michael Keesey
Director of Technology, Exopolis, Inc.