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Genetic analysis of Tardigrades suggests closer relation to Roundworms
Topic Started: Aug 4 2017, 10:57 AM (476 Views)
Talenkauen
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http://www.eartharchives.org/articles/tardigrade-genome-reveals-secrets-of-their-toughness-and-evolution/
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Talenkauen
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Oh crap, wrong board. Can someone move this to Science Central?..... :/
Edited by Talenkauen, Aug 4 2017, 10:59 AM.
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Yiqi15
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I can copy and post it for you.
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Talenkauen
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Yiqi15
Aug 4 2017, 11:12 AM
I can copy and post it for you.

I'm not sure if that's necessary.
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LittleLazyLass
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Zorcuspine
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IIGSY
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Isn't the tardigrade-nematode relationship an artefact of long branch attraction? Don't tardigrades share several unique microRNA'S with velvet worms and arthropods?
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kusanagi
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Stem tardigrade Orstenotubulus was not walking on its lobopodia but comparisons have been made between the cuticle of O. and of onychophora. Not enough to state a relationship though. The lobopodia of tardigrades unlike those of onychophores are telescopic. I'm not 100% sure tardigrades are panarthropods because if they are then their anatomy is apomorphic and particularly miniaturized. Nielson was mistaken in his Tactopoda hypothesis placing tardigrades closer to euarthropods than are onychophores. The Liu et al paper claiming Diana is a true arthropod placed tardigrades and onychophores as a monophyletic clade to the exclusion of euarthropods.
Edited by kusanagi, Aug 4 2017, 02:53 PM.
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IIGSY
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kusanagi
Aug 4 2017, 02:47 PM
Stem tardigrade Orstenotubulus was not walking on its lobopodia
How do we know that? And what does telescopic mean?
Projects
Punga: A terraformed world with no vertebrates
Last one crawling: The last arthropod

ARTH-6810: A world without vertebrates (It's ded, but you can still read I guess)

Potential ideas-
Swamp world: A world covered in lakes, with the largest being caspian sized.
Nematozoic: After a mass extinction of ultimate proportions, a single species of nematode is the only surviving animal.
Tri-devonian: A devonian like ecosystem with holocene species on three different continents.

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Phylogeny of the arthropods and some related groups


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Rodlox
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Aug 4 2017, 03:03 PM
kusanagi
Aug 4 2017, 02:47 PM
Stem tardigrade Orstenotubulus was not walking on its lobopodia
How do we know that? And what does telescopic mean?
ever see, in movies or tv, how they pull a telescope open, or slam one short? that.

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IIGSY
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Rodlox
Aug 4 2017, 07:46 PM
Insect Illuminati Get Shrekt
Aug 4 2017, 03:03 PM
kusanagi
Aug 4 2017, 02:47 PM
Stem tardigrade Orstenotubulus was not walking on its lobopodia
How do we know that? And what does telescopic mean?
ever see, in movies or tv, how they pull a telescope open, or slam one short? that.

Posted Image Posted Image
So it had retractable limbs?
Projects
Punga: A terraformed world with no vertebrates
Last one crawling: The last arthropod

ARTH-6810: A world without vertebrates (It's ded, but you can still read I guess)

Potential ideas-
Swamp world: A world covered in lakes, with the largest being caspian sized.
Nematozoic: After a mass extinction of ultimate proportions, a single species of nematode is the only surviving animal.
Tri-devonian: A devonian like ecosystem with holocene species on three different continents.

Quotes


Phylogeny of the arthropods and some related groups


In honor of the greatest clade of all time


More pictures


Other cool things


All African countries can fit into Brazil
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kusanagi
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Tardigrade lobopodia possess a retractile in-out nature like the telescope. Those of O. we're of no use in walking like an onychophores, based upon their position - think of the cave leech lobopodia. So if nothing else functional legs may have evolved twice in ecdysozoans.
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