Talk:Notostraca

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Q. OK, is there any sub for distilled water for the eggs?

A. Yes De-ionized water. Spring water will work, but with a lower success rate and not always on the first hydration.

[edit] Oldest species

Regarding the comment of the triops being the oldest animal species this is taken from the wiki on the ginkgo biloba http://en.wikipedia.org/wiki/Ginkgo

""The Ginkgo is a living fossil, with fossils recognisably related to modern Ginkgo from the Permian, dating back :270 million years"

and that beats the triops by 50 million years ;-)

well, in the species category. Not in the animal species since the ginkgo is a plant. But I guess you can decorate with ginkgo leaves to make your triops feel at home.

D0rian 00:02, 22 December 2006 (UTC)

Two points: firstly, as you mentioned, ginkgo is not an animal. Secondly, and perhaps more importantly, the fossil ginkgos are not G. biloba, but other species in the genus / family, the key words being "recognisably related to". --Stemonitis 09:44, 22 December 2006 (UTC)

I'm adding onto the part about it being a living fossil because there are several other animals that outdate it by millions of years, so it cannot possibly the "oldest living animal." Examples include the Crinoids which date back between 488 and 443 MYA, and Horseshoe crabs which date back to 540-248 MYA.

Please see my comments directly above yours. Crinoids may as a whole be older than T. cancriformis, but no single crinoid species is reported to be that old. Similarly for horseshoe crabs — the fossils are not (currently classified as) Limulus polyphemus, so the species is not that old, although the group as a whole may be. --Stemonitis 00:13, 3 January 2007 (UTC)

I see. Sorry about that. I didn't quite understand what you were getting to when you said "other species in the genus / family, the key words being "recognisably related to." Thanks for the clarification.

[edit] Cambrian fossils?!

Encarta Reference Library has an article on Notostraca. It says that notostracan fossils are present in Cambrian rock. Does this mean they have been on Earth since the Cambrian period?Crustaceanguy 01:32, 22 January 2007 (UTC)

Apparently, they have, albeit a different species of them. Triops cancriformis has been around since the Triassic period, but it's ancestors are certainly much older. Triassic fossils, so I've read, are different enough to any earlier fossils to be classified as a different species. --Xanthine 13:29, 25 January 2007 (UTC)

Yes, I was talking about the order and not the species. Thank you.--Crustaceanguy 23:46, 25 January 2007 (UTC)

No problem. :) By the way, I think the picture at the top of this page is incorrectly labelled. It looks more like a Triops Australiensis to me... --Xanthine 00:02, 30 January 2007 (UTC)

I'm sorry, but I do not believe I can confirm this. Triops australiensis and Triops longicaudatus are in fact very similar.--Crustaceanguy 21:04, 10 February 2007 (UTC)

Hence the difficulty in confirming their various sub-species, I suppose. No worries -- just thought it might be worth further investigation. --Xanthine 16:35, 5 March 2007 (UTC)