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Post by johnwinters on Aug 27, 2008 15:50:40 GMT
Anyone have any of these guys? Ancient Crustaceans dating back to Triassic period  |
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Post by sbell on Aug 27, 2008 17:20:08 GMT
Holy jeez--we sell them in our gift store, but I've never seen one that big!
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Post by kuni on Aug 27, 2008 18:22:43 GMT
I've caught lots out in ponds in the American Southwest where I was doing fieldwork, including a few that size or bigger(!). They're pretty awesome animals, and there are a few folks doing research on the different species to see if there''s anything particularly weird with their genetics because they've persisted so long.
Personally, i suspect the reason they've survived so long is the life cycle -- the eggs can remain dormant for a very long time, and they can be spread via wind (I think), so it's probably very difficult to drive extinct.
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Post by richard on Aug 27, 2008 22:05:19 GMT
COOL  |
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Post by [][][]cordylus[][][] on Aug 28, 2008 0:08:16 GMT
I usually make these every 1-2 months I have a ten gallon cage for them, with live elodea and I feed them a mixture of vegetables and occasionally some mosquito larva. |
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Post by tomhet on Aug 28, 2008 6:56:13 GMT
Geez, this is amazing! I had heard of 'em a while ago, but never actually seen them.
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Post by sid on Aug 28, 2008 10:12:18 GMT
Really cool  So,they are still kickin' since the Triassic? They're badass |
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Post by thagomizer on Aug 29, 2008 2:13:22 GMT
Really cool So,they are still kickin' since the Triassic? They're badass A different species though, right? It's like saying crocs have been around since the Triassic--well yeah, the ORDER has, but the SPECIES alive now didn't show up till the Cenozoic. Same with coelocanths, etc. Like saying mammals are living fossils because they date back to the Triassic  |
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Post by johnwinters on Aug 29, 2008 15:16:15 GMT
Triops is considered a living fossil because its basic morphology has changed little in the last 70 million years. Triops longicaudatus is among the oldest animal species to still exist.
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Post by sid on Aug 29, 2008 16:12:54 GMT
Really cool So,they are still kickin' since the Triassic? They're badass A different species though, right? It's like saying crocs have been around since the Triassic--well yeah, the ORDER has, but the SPECIES alive now didn't show up till the Cenozoic. Same with coelocanths, etc. Like saying mammals are living fossils because they date back to the Triassic Ok,ok,no need to be too picky |
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Post by tomhet on Aug 29, 2008 16:17:04 GMT
Really cool So,they are still kickin' since the Triassic? They're badass A different species though, right? It's like saying crocs have been around since the Triassic--well yeah, the ORDER has, but the SPECIES alive now didn't show up till the Cenozoic. Same with coelocanths, etc. Like saying mammals are living fossils because they date back to the Triassic Actually it is the same species, Triops cancriformis, found in Triassic stones  |
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Post by thagomizer on Aug 29, 2008 16:24:14 GMT
A different species though, right? It's like saying crocs have been around since the Triassic--well yeah, the ORDER has, but the SPECIES alive now didn't show up till the Cenozoic. Same with coelocanths, etc. Like saying mammals are living fossils because they date back to the Triassic Actually it is the same species, Triops cancriformis, found in Triassic stones Really? I'm not trying to be a jerk I swear, I'm really curious. If it's the same species, that's a legit living fossil and a really cool exception to the rule. You see this in some insects too. |
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Post by tomhet on Aug 29, 2008 16:26:23 GMT
Yup, it is the same species.
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Post by thagomizer on Aug 29, 2008 16:28:03 GMT
Actually it is the same species, Triops cancriformis, found in Triassic stones Really? I'm not trying to be a jerk I swear, I'm really curious. If it's the same species, that's a legit living fossil and a really cool exception to the rule. You see this in some insects too. Wow, you're right! en.wikipedia.org/wiki/Triops_cancriformisIt's endangered too. I'd feel like a total jerk if I were a member of the (hundred thousand year old) species who pushed a species that's lasted 2 ERAS into extinction... That's bloody amazing. I had no idea any individual species lasted that long. Even modern mayflies only date back to the EK. I need to give these boring vertebrates a rest for a bit and read about some arthropods  |
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Post by Dinotoyforum on Aug 29, 2008 17:16:57 GMT
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Post by richard on Aug 29, 2008 17:29:07 GMT
I usually make these every 1-2 months I have a ten gallon cage for them, with live elodea and I feed them a mixture of vegetables and occasionally some mosquito larva. dude let them free |
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Post by sid on Aug 29, 2008 17:38:24 GMT
So it is really the same species...Amazing |
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Post by stoneage on Aug 29, 2008 21:55:51 GMT
;D I was wondering if they have any relationship to Trilobites?
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Post by [][][]cordylus[][][] on Aug 29, 2008 22:24:09 GMT
I usually make these every 1-2 months I have a ten gallon cage for them, with live elodea and I feed them a mixture of vegetables and occasionally some mosquito larva. dude let them free Ummm... Why the heck would I do that? There are no Ideal conditions for them here in des moines, Iowa. So you just want me to kill them? |
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Post by crazycrowman on Aug 29, 2008 23:12:00 GMT
I had those before. Very cool creatures. "Triops is considered a living fossil because its basic morphology has changed little in the last 70 million years. Triops longicaudatus is among the oldest animal species to still exist." Don't forget the "true" Horseshoe crabs - They like to show up all over the local beaches around here every summer/fall I have a few X specimens hanging in my living room :-) en.wikipedia.org/wiki/Horseshoe_craben.wikipedia.org/wiki/Living_fossil(About "Living fossils" - granted, it is an informal term...As an OT note, magpie geese and mousebirds are listed on there |
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