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Gaborn
Gaborn News:
Penetrating Your World™
(05-29-2008, 09:54 PM)
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"Amphibian horror" isn't a movie genre, but on this evidence perhaps it should be. Harvard biologists have described a bizarre, hairy frog with cat-like extendable claws.

Trichobatrachus robustus actively breaks its own bones to produce claws that puncture their way out of the frog's toe pads, probably when it is threatened.

David Blackburn and colleagues at Harvard University's Museum of Comparative Zoology, think the gruesome behaviour is a defence mechanism.

The researchers say there are salamanders that force their ribs through their skin to produce protective barbs on demand, but nothing quite like this mechanism has been seen before.

The feature is also found in nine of the 11 frogs belonging to the Astylosternus genus, most of which live in Cameroon.
Instant weapon

"Some other frogs have bony spines that project from their wrist, but in those species it appears that the bones grow through the skin rather than pierce it when needed for defence," says Blackburn.

At rest, the claws of T. robustus, found on the hind feet only, are nestled inside a mass of connective tissue. A chunk of collagen forms a bond between the claw's sharp point and a small piece of bone at the tip of the frog's toe.

The other end of the claw is connected to a muscle. Blackburn and his colleagues believe that when the animal is attacked, it contracts this muscle, which pulls the claw downwards. The sharp point then breaks away from the bony tip and cuts through the toe pad, emerging on the underside.
Hirsute horror

The end result may look like a cat's claw, but the breaking and cutting mechanism is very different and unique among vertebrates. Also unique is the fact that the claw is just bone and does not have an outer coating of keratin like other claws do.

Because Blackburn has only studied dead specimens, he says he does not know what happens when the claw retracts – or even how it retracts. It does not appear to have a muscle to pull it back inside so the team think it may passively slide back into the toe pad when its muscle relaxes.

"Being amphibians, it would not be surprising if some parts of the wound heal and the tissue is regenerated," says Blackburn.

Males of the species, which grows to about 11 centimetres, also produce long hair-like strands of skin and arteries when they breed (see image). It is thought that the "hairs" allow them to take in more oxygen through their skin while they take care of their brood.
Spiky snack

In Cameroon, they are roasted and eaten. Hunters use long spears and machetes to kill the frogs, apparently to avoid being hurt by their claws.

"This is an incredible story," says Ian Stephen, curator of herpetology at the Zoological Society of London, UK. "Some frogs grow spines on their thumbs during breeding season, but this is entirely different."

"For me, it highlights the need for a lot more research on amphibians especially in light of the threat of mass extinctions," he adds.

The existence of frogs with erectile claws like cats was first described by Belgian zoologist George Boulenger in 1900 in frogs found in the French Congo, now the Republic of Congo.

Journal reference: Biology Letters (DOI: 10.1098/rsbl.2008.0219)


Story Here
Jenga
Banned
(05-29-2008, 09:55 PM)
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Weapon X frogs?
Colonel Sweeto
Junior Member
(05-29-2008, 09:57 PM)
wat
Count Dookkake
Member
(05-29-2008, 09:57 PM)
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Ribbit, bub.
DarienA
The black man everyone at Activision can agree on
(05-29-2008, 09:59 PM)
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Originally Posted by Jenga

Weapon X frogs?

Crap beat me to it... :)
omg rite
Banned
(05-29-2008, 10:00 PM)
God dammit, the Wolverine joke was already made.

Edit: Multiple times it seems. :[
joey_z
Banned
(05-29-2008, 10:01 PM)
No wolverine O face on the frog yet? Disappointing GAF...
Grizzlyjin
Member
(05-29-2008, 10:01 PM)
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I came for the Wolverine jokes, I stayed for the hairy frog.

Eh, since when do frogs have hair. What up with that?
Gaborn
Gaborn News:
Penetrating Your World™
(05-29-2008, 10:03 PM)
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By the way, this is what the claws look like from the outside



And an internal view (the white is bone, not skin)
BobFromPikeCreek
I am hard
yet I am tender
(05-29-2008, 10:07 PM)
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That is fucked up.
bud
straight
(05-29-2008, 10:08 PM)
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that frog is fucking badass
Insertia
Will he eat his hat?
Stay tuned, true believer!
(05-29-2008, 10:08 PM)
Frog with fur and claws?

Cats evolved from this animal.

Wimpy claws and both frogs and cats make bitch pets.

We have our proof.
Gaborn
Gaborn News:
Penetrating Your World™
(05-29-2008, 10:21 PM)
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Originally Posted by Insertia

Frog with fur and claws?

Cats evolved from this animal.

Wimpy claws and both frogs and cats make bitch pets.

We have our proof.

Actually they thought of that:

The end result may look like a cat's claw, but the breaking and cutting mechanism is very different and unique among vertebrates. Also unique is the fact that the claw is just bone and does not have an outer coating of keratin like other claws do.

Dr. Kitty Muffins
Member
(05-29-2008, 10:25 PM)
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Does it regenerate? :lol
kame-sennin
Member
(05-29-2008, 10:30 PM)
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Originally Posted by Dr. Kitty Muffins

Does it regenerate? :lol

They're the best there is at what they do...

"Being amphibians, it would not be surprising if some parts of the wound heal and the tissue is regenerated," says Blackburn.

Dan
Currently boycotting the Wolfenstein franchise
(05-29-2008, 10:35 PM)
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The researchers say there are salamanders that force their ribs through their skin to produce protective barbs on demand, but nothing quite like this mechanism has been seen before.

Frankly, I'm more impressed by this than the frog claws.
bengraven
will fuck homely black hookers in the name of progress and tolerance
(05-29-2008, 10:37 PM)
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I don't know comic fanboys, sounds more Marrow than Wolverine.

"Being amphibians, it would not be surprising if some parts of the wound heal and the tissue is regenerated," says Blackburn.

Edit: nvm, Mr. James "Logan" Howell it is.
Monsterland
Member
(05-29-2008, 10:53 PM)
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hairy frog? :barf:
reilo
learning some important life lessons from magical Negroes
(05-29-2008, 10:55 PM)
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Nope. Still nothing!
Gaborn
Gaborn News:
Penetrating Your World™
(05-29-2008, 11:39 PM)
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Originally Posted by reilo



Nope. Still nothing!

This has absolutely nothing whatsoever either way to do with evolution vs creationism.
robojimbo
Member
(05-29-2008, 11:45 PM)
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[img]michaelbiehn.jpg[/img]
Immortal_Daemon
Member
(05-29-2008, 11:47 PM)
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That is amazing.


I wonder if it hurts them.
Monocle
Member
(05-29-2008, 11:48 PM)
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Heh!

[IMG]http://i29.************/2wm0ufb.jpg[/IMG]



Originally Posted by reilo

http://www.slashfood.com/media/2006/01/peanut_butter.JPG

Nope. Still nothing!

Get back in your corner.
[IMG]http://i25.************/2ij235w.gif[/IMG]
OatmealMu
I will pee on you and
your undead cousin
(05-29-2008, 11:48 PM)
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I knew Battletoads was real.
Ceres
Member
(05-29-2008, 11:51 PM)
I thought the picture was going to be gross from the thread title but it's really only extremely cool.
Echoes
Member
(05-30-2008, 01:00 AM)
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Frog, Frogsharp, Frogsharparina. Simple principles of Pokemons evolutions.
acidviper
Banned
(05-30-2008, 01:19 AM)
Somebody photoshop a SNKKKT on that froggie
ZiZ
that ain't rice
it's bits of Semtex
(05-30-2008, 01:27 AM)
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WOW!!!

but I doubt they would be very effective as a defense mechanism. what if it used it to climb trees or something.
Sho_Nuff82
(05-30-2008, 01:30 AM)
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Looks more like Spiderman 2099's fingers. Anybody remember Spiderman 2099? Miguel O'Hara?

*crickets*
boutrosinit
Street Fighter IV World Champion
(05-30-2008, 01:30 AM)
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Evolution is AWESOME
Wii
Banned
(05-30-2008, 01:33 AM)
That's really interesting, and perhaps that's how the first animals grew claws.
jenov4
Member
(05-30-2008, 01:56 AM)
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Originally Posted by Monsterland

hairy frog? :barf:

QFT. i'm more repulsed by the hair legs of that picture.
Nolan.
Member
(05-30-2008, 02:05 AM)
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Originally Posted by jenov4

QFT. i'm more repulsed by the hair legs of that picture.

Yeah, that oddly freaked me out a little not even sure why.
mosaic
go eat paint
(05-30-2008, 02:13 AM)
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Quick, someone inject some Adamantium into that frog -- STAT!!

Mark my words: It won't be long before we find frogs that can fire lasers out of their eyes or control our minds.
Screaming_Gremlin
My QB is a Dick and my coach is a Nutt
(05-30-2008, 02:19 AM)
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Originally Posted by mosaic

Mark my words: It won't be long before we find frogs that can fire lasers out of their eyes or control our minds.


Close enough
xBerserker
Member
(08-01-2008, 04:31 PM)
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Originally Posted by Immortal_Daemon

That is amazing.


I wonder if it hurts them.

Every time, bub
ChackanKun
Member
(08-01-2008, 04:33 PM)
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Kind of creepy :O
NarcissisticJay
Member
(08-01-2008, 04:37 PM)

Originally Posted by -xBerserker-

Every time, bub

Well done.
The Lamonster
Member
(08-01-2008, 04:39 PM)
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Originally Posted by -xBerserker-

Every time, bub

redeemed
PacoDG
Member
(08-01-2008, 04:40 PM)
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Originally Posted by joey_z

No wolverine O face on the frog yet? Disappointing GAF...

please someone, improve on this crappy one
[IMG]http://i36.************/1zdbtbq.jpg[/IMG]
xBerserker
Member
(08-01-2008, 05:20 PM)
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Tried o face, can't get it to look right, weird angle. But I added the Wolverine chops!

[IMG]http://i36.************/2lc69nr.jpg[/IMG]
Flynn
"I am so fired..."
(08-01-2008, 05:30 PM)
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*ribbit*ribbit*ribbit*snikt*
LunaClover
Member
(08-01-2008, 05:32 PM)
Awwww so cute. With the sideburns and the claws.
Eric P
Member
(08-01-2008, 05:40 PM)

"Amphibian horror" isn't a movie genre,

actually...
Orin GA
I wish I could hat you to death
(08-01-2008, 06:33 PM)
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Bah...............
Spectral Glider
Member
(08-01-2008, 06:36 PM)
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Crog? or Frat?
Tr4nce
Member
(08-01-2008, 06:46 PM)
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If there is a God, he surely has thought up some peculiar things. Keep it up sir!
Archer
Member
(08-01-2008, 06:49 PM)
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Evolution.
Pancakes
hot, steaming, as melted butter slips into the cracks, drizzled with sticky sweet syrup OH GOD
(08-01-2008, 06:50 PM)
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Creepy and yet so awesome.

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