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Helicoprion as chimeroid by DiBgd Helicoprion as chimeroid by DiBgd
Helicoprion shown as chimeroid-like. 
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:iconacepredator:
acepredator Featured By Owner Edited May 1, 2015
Finally an accurate depiction. A chimera, but with the build of the open-water apex predator it was.
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:iconwwcb:
WWCB Featured By Owner Oct 28, 2014
:D
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:iconking-edmarka:
King-Edmarka Featured By Owner Mar 30, 2014  Hobbyist General Artist
Wonderful work!  But why the absence of Pelvic fins?  I see that a lot on depictions of Helicoprion.
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:iconavancna:
avancna Featured By Owner Apr 30, 2014  Hobbyist Traditional Artist
Apparently, those few eugeneodontids known from whole fossils all lack pelvic and anal fins.
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:iconvasix:
vasix Featured By Owner Apr 28, 2016  Hobbyist Digital Artist
Hey...um...do you have any research papaers about this?
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:iconavancna:
avancna Featured By Owner Apr 29, 2016  Hobbyist Traditional Artist
Whole body fossils of the related genera Caseodus and Romerodus demonstrate the eugeneodontids lacked anal and pelvic fins.  A Pictorial Guide To Fossils has photographs of them.
www.amazon.com/Pictorial-Guide…
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:iconjustarandomgourgeist:
JustaRandomGourgeist Featured By Owner Dec 1, 2015  Hobbyist Digital Artist
then..... HOW ON EARTH DID THEY MAKE BABIES?!
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:iconavancna:
avancna Featured By Owner Dec 1, 2015  Hobbyist Traditional Artist
They could probably still guide each other.
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:iconjustarandomgourgeist:
JustaRandomGourgeist Featured By Owner Dec 1, 2015  Hobbyist Digital Artist
but they don't have any obvious claspers
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:iconavancna:
avancna Featured By Owner Dec 3, 2015  Hobbyist Traditional Artist
All I know is from the known whole body fossils of eugeneodonts
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:iconking-edmarka:
King-Edmarka Featured By Owner Apr 30, 2014  Hobbyist General Artist
Hmm, strange.  I wonder what evolutionary purpose that would serve...
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:iconavancna:
avancna Featured By Owner Apr 30, 2014  Hobbyist Traditional Artist
Not all structures necessarily have a purpose: such a state could have been due to extreme streamlining, or could have been due to an accumulation of mutations or deletions that causes the loss of those fins that did not negatively impact the ability of eugeneodontids' swimming ability.
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:iconking-edmarka:
King-Edmarka Featured By Owner May 1, 2014  Hobbyist General Artist
Interesting.  Makes sense.  :nod:
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:iconavancna:
avancna Featured By Owner May 1, 2014  Hobbyist Traditional Artist
While a new inheritable trait that confers an advantage enhances its potential to be inherited, an inheritable trait that does not impair its current owner's ability to successfully breed will also get a chance to be inherited, like, say, the situation of Huntington's Disease, a degenerative disease whose symptoms only begin appearing when the victim is in their 50's.
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:iconpeteridish:
PeteriDish Featured By Owner Apr 2, 2014  Hobbyist General Artist
that puzzles me too
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March 30, 2014
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