Genome Analysis Of The Duck-Billed Platypus

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Re: Genome Analysis Of The Duck-Billed Platypus

Post by bobbo_the_Pragmatist » Thu May 12, 2016 8:34 pm

43!
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Re: Genome Analysis Of The Duck-Billed Platypus

Post by Kevin Levites » Wed Feb 01, 2017 2:32 pm

Isaac Asimov suggested an interesting idea about the duckbill platypus and it's mix of mammalian and reptilian features.

He seemed to suggest that the platypus not be considered a reptile or a mammal, but a kind of living fossil...the last surviving member of a group of animals called therapsids.

Evidentally, the trigeminal nerve in mammals exits the skull through a hole in a cranial bone, while the trigeminal nerve exits the skull through a hole that occurs in a boney suture (where two bone plates come together) in the extinct therapsids, and also in modern reptiles.

If we include this detail, then the platypus seems to have more reptillian features than mammalian ones.

Perhaps we classify it as a mammal for reasons having more to do with 'hair chauvanism' than anatomical reality.

Asimov's idea of classifying it as a surviving therapsid seems to be a middle-of-the-road compromise position, and I think it's a good one.
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Re: Genome Analysis Of The Duck-Billed Platypus

Post by Poodle » Wed Feb 01, 2017 2:47 pm

... not to mention the small matter of its egg-laying habits.

For this reason alone, I'm going for flightless bird.

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Re: Genome Analysis Of The Duck-Billed Platypus

Post by Kevin Levites » Wed Feb 01, 2017 3:01 pm

Thank you for answering my post, but the eggs are very similar to reptillian eggs, not bird eggs.
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Re: Genome Analysis Of The Duck-Billed Platypus

Post by Poodle » Wed Feb 01, 2017 5:15 pm

Yes, Kevin. It was humour.

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Re: Genome Analysis Of The Duck-Billed Platypus

Post by ElectricMonk » Wed Feb 01, 2017 6:43 pm

It's a weird critter - venomous, too.
That is very unusual in that part of the tree of Life.

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Re: Genome Analysis Of The Duck-Billed Platypus

Post by Poodle » Wed Feb 01, 2017 7:16 pm

Platypus, Echidna, Kangaroo, Koala, Wombat, Quoll. They're all weird and all have something in common.

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Re: Genome Analysis Of The Duck-Billed Platypus

Post by Nobrot » Wed Feb 01, 2017 8:00 pm

Poodle wrote:Platypus, Echidna, Kangaroo, Koala, Wombat, Quoll. They're all weird and all have something in common.

They can't fly?

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Re: Genome Analysis Of The Duck-Billed Platypus

Post by Poodle » Wed Feb 01, 2017 9:14 pm

Wombats can - but only at night.

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Re: Genome Analysis Of The Duck-Billed Platypus

Post by Gord » Thu Feb 02, 2017 3:49 am

Poodle wrote:Wombats can - but only at night.

And only on the other side of the Earth, which makes sense, 'cause up is down there and down is up.

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Re: Genome Analysis Of The Duck-Billed Platypus

Post by Matthew Ellard » Thu Feb 02, 2017 4:12 am

Poodle wrote:Wombats can - but only at night.
We actually do have some flying marsupials. The sugar glider. It is, indeed, nocturnal and a pretty little thing.
sugar-glider 2.jpg
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Re: Genome Analysis Of The Duck-Billed Platypus

Post by Gord » Thu Feb 02, 2017 4:15 am

Technically, gliders aren't flyers.

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Re: Genome Analysis Of The Duck-Billed Platypus

Post by Matthew Ellard » Thu Feb 02, 2017 4:23 am

Gord wrote:Technically, gliders aren't flyers.

Oh Yeah? Explain this!!!!!!!
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Re: Genome Analysis Of The Duck-Billed Platypus

Post by Major Malfunction » Thu Feb 02, 2017 4:45 am

If you put a leather jacket on a kite, it doesn't fly. Therefore God.

I also like the aerodynamic ballsack in that possum illustration. It's a nice detail.

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Re: Genome Analysis Of The Duck-Billed Platypus

Post by Gord » Thu Feb 02, 2017 8:54 am

Major Malfunction wrote:If you put a leather jacket on a kite, it doesn't fly. Therefore God.

I also like the aerodynamic ballsack in that possum illustration. It's a nice detail.

http://www.youtube.com/watch?v=6IG2mJuB2Yk

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Re: Genome Analysis Of The Duck-Billed Platypus

Post by Abdul Alhazred » Thu Feb 02, 2017 9:26 pm

Never mind that.

How the heck did the platypuses get back to Australia from Mount Ararat? :pr:
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Re: Genome Analysis Of The Duck-Billed Platypus

Post by scrmbldggs » Thu Feb 02, 2017 9:48 pm

The moon helped. But you can't explain that...
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Re: Genome Analysis Of The Duck-Billed Platypus

Post by Gord » Fri Feb 03, 2017 6:44 am

Tide goes in, tide goes out.
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Re: Genome Analysis Of The Duck-Billed Platypus

Post by Poodle » Fri Feb 03, 2017 7:03 am

Abdul Alhazred wrote:Never mind that.

How the heck did the platypuses get back to Australia from Mount Ararat? :pr:


Platypodes. :neener:

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Re: Genome Analysis Of The Duck-Billed Platypus

Post by scrmbldggs » Fri Feb 03, 2017 7:20 am

Poodle wrote:
Abdul Alhazred wrote:Never mind that.

How the heck did the platypuses get back to Australia from Mount Ararat? :pr:


Platypodes. :neener:

Platytoots. :nyaah:
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Re: Genome Analysis Of The Duck-Billed Platypus

Post by ElectricMonk » Fri Feb 03, 2017 9:04 am

It's from Australia - it used a surfboard
- duh.

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Re: Genome Analysis Of The Duck-Billed Platypus

Post by Abdul Alhazred » Fri Feb 03, 2017 9:40 am

ElectricMonk wrote:It's from Australia - it used a surfboard
- duh.


:mrgreen:
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