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Scissorheads by thomastapir Scissorheads by thomastapir
More "fenestrated filter feeders." The idea here is similar to the Combills, but with a more "scissoring"-style jaw arrangement. The mechanics of feeding are also a little different in these guys. Organic material is collected on the ridged sieve plates, but instead of being "squeezed off" by a surrounding contractile sphincter and absorbed into mucous membranes, food is "brushed" off by the stiff, baleen-like hairs of the complementary mandible and sucked, vacuum-like, into a food intake tube.

The fellow on the middle left shows how the upper and lower mandibles serve a dual purpose as both "collectors" and "scrapers." In this arrangement, intake tubes are located in both the upper and lower mandibles rather than between the mandibles as in terrestrial vertebrates. The smaller study below shows how this style of "scissors" would look in their closed position. The "baleen" bristles have been omitted for clarity.

These guys could live a lifestyle similar to manatees, whales, hippos, or flamingos; I don’t really have any preconceptions about them, though I guess I did picture them being larger animals than the Combills. There's no consistency between the optical configurations because I don't really have a defined morphological template or evolutionary background for these creatures; I was just playing with the visual aspects of their design at this point.
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:iconsphenacodon:
Sphenacodon Featured By Owner Sep 29, 2008
I see these guys have eyes. :)

Just... amazing. Hats off, sir. I can say no more.
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:iconthomastapir:
thomastapir Featured By Owner Oct 1, 2008
Thanks very much! You are too kind. :)
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:iconstahlhelm:
Stahlhelm Featured By Owner Sep 20, 2008
This is one of my favorite things that you've done in a while.
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:icondsil:
DSil Featured By Owner Sep 19, 2008  Student General Artist
Wow, I've literally NEVER seen something like this. Cool!
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:iconm0ai:
M0AI Featured By Owner Sep 19, 2008  Professional Digital Artist
You struck a rich vein of inspiration with this filter-feeding idea.
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:iconpiatnitskysaurus:
Piatnitskysaurus Featured By Owner Sep 19, 2008
What else can I say?

The coolness is eating my brain!
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:iconthomastapir:
thomastapir Featured By Owner Sep 19, 2008
Is it straining it through sieve-like plates? :lol:

Thanks very much!
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:iconpiatnitskysaurus:
Piatnitskysaurus Featured By Owner Sep 19, 2008
My brain! the plates are shredding my bwainz!
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:iconrodlox:
Rodlox Featured By Owner Sep 18, 2008
wild hunch here - those things didn't develop from gill arches! :)

they're very neat (and you can tell them I said so)
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:iconthomastapir:
thomastapir Featured By Owner Sep 18, 2008
:lol: Thanks, I will!

You raise a good point; I'm not sure exactly what kind of anatomical feature would have given rise to this feeding apparatus. Maybe a respiratory opening? If so, the conflation of respiratory and digestive infrastructure would give them something in common with terrestrial vertebrates.
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:iconrodlox:
Rodlox Featured By Owner Sep 18, 2008
maybe it started out as a groove in the skull, rather than part of the gills.

may I try sketching it out? I probably won't post it anyway, but I want to ask.
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:iconthomastapir:
thomastapir Featured By Owner Sep 19, 2008
Hey, go for it! I'd love to see your take on it. That goes for anything in my gallery, BTW--I'm always excited to see how others might riff on my concepts and images.
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:iconrodlox:
Rodlox Featured By Owner Sep 22, 2008
thank you.
I'll have the basal Scissorheads up by tomorrow - got the basal Pinnipedimorphs up today.
fire at will.
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:iconwhalewithlegs:
whalewithlegs Featured By Owner Sep 18, 2008
When I saw these I was like, "YESSSSSSS."
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:iconthomastapir:
thomastapir Featured By Owner Sep 18, 2008
:lol: Thanks, man! I can't imagine a better compliment!
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:icondoodlebotbop:
Doodlebotbop Featured By Owner Sep 18, 2008  Hobbyist General Artist
Whooa XD They look so trippy.
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:iconthomastapir:
thomastapir Featured By Owner Sep 18, 2008
That don't hurt their feelings none! : )
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:icondoodlebotbop:
Doodlebotbop Featured By Owner Sep 18, 2008  Hobbyist General Artist
XD Yay!
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September 18, 2008
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