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| Multipoda; A planet with tripods, quintapods, and hexapods. | |
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| Topic Started: Mar 28 2010, 02:10 AM (2,568 Views) | |
| Pando | Mar 28 2010, 02:10 AM Post #1 |
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Obey or I'll send you to the moon
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On multipoda there are 3 continents that are isolated. On these continents life could not be more different. There are 3 phyla of land animals, the tripods, quintapods, and hexapods. What kind of life could exist on Multipoda? The creatures have a carbon composition, the star is a K star slightly smaller than Sol, multipoda is covered in water and there are no ice caps. Multipoda: Size: 90% Earth radius. Gravity: 95% Earth gravity. Atmospheric composition: Methane, oxygen, carbon dioxide, hydrogen, argon, nitrous oxide (laughing gas), nitrogen, water vapor, and ammonia. Atmospheric composition by percent: 30% Nitrous oxide, 15% oxygen, 15% nitrogen, 20% chlorine, 5% chlorine dioxide, 5% nitrogen dioxide, 5% carbon dioxide, 2.5% xenon, and 2.5% water vapor. Atmospheric pressure: 130% Earth. Distance from star: 1 AU. Temperature: 6 degrees hotter than Earth. Keeps hot because of the nitrous oxide (over 200 times as effective as carbon dioxide) and carbon dioxide. Star: Orange dwarf star 0.8 solar radius and 0.6 solar luminosity. Because of the the high amount of xenon (make up 2.5% of the atmosphere) spectacular lightning storms exist on Multipoda. The creatures mainly breathe nitrous oxide (N2O) and ammonia (NH3) (but they can use any mixture of nitrous oxide, ammonia, oxygen, nitrogen, and hydrogen) to use the oxygen and hydrogen they breathe and combine it with the carbon they eat to form glucose and the nitrogen they use for the electron transport system (because the 2nd shell has only 5 electrons in it, it can take 3 electrons in the electron transport system instead of the 2 as in oxygen, so that 2 transports of nitrogen forms 3 glucose, while oxygen would form 2 glucose, making nitrogen more effective) (knowing biology rocks). They breathe through holes on the top of their bodies, have 4 eyes (1 pair seeing in infrared, the other pair seeing in visible light) and reproduce by holes usually at the base of the tail or neck that can close with a hard covering so that they're protected. Who likes the idea? Edited by Pando, Mar 29 2010, 01:50 AM.
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| Pando | Mar 29 2010, 11:19 PM Post #16 |
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Obey or I'll send you to the moon
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Why...Does...Everyone...Keep...On...Asking...About...The...Continents? The point of this thread is not about how they are kept separated, but on the life. |
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| colddigger | Mar 29 2010, 11:55 PM Post #17 |
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Joke's over! Love, Parasky
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Not that difficult to see several different critters appear like on this world (in fact only having three seems odd to me), although keeping them separate is unlikely. just thinking about how we have our happy land chordates, then we also have various molluscs and arachnids and centipedes etc. not to mention flatworms and segmented worms... if all three of these things have internal skeletons it'd be interesting... |
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Oh Fine. Oh hi you! Why don't you go check out the finery that is SGP?? v Don't click v Spoiler: click to toggle | |
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| Empyreon | Mar 30 2010, 01:37 AM Post #18 |
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Are you plausible?
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I'm sorry, I assumed by the fact that it was the first thing you mentioned that it was an important aspect of the project's development. Please introduce your first creatures, and with time I'll come to understand how it all fits together. |
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Take a look at my exobiology subforum of the planet Nereus! COM Contributions food for thought
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| Pando | Mar 30 2010, 01:40 AM Post #19 |
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Obey or I'll send you to the moon
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I've got 4 concepts, 1 hexapod and quintapod and 2 tripods. Although the hexapod, quintapods, and 1 of the tripod has bilateral symmetry, which I don't want in all creatures. I want a lot of them to have either trilateral (which 1 of my concepts has), quintaletral, or hexalateral symmetry. |
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| Margaret Pye | Apr 1 2010, 11:26 PM Post #20 |
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Adult
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Should you start by designing bauplans for the most basal members of each phylum (or class or whatever) and then figuring out how those bauplans could evolve for life on land? |
| My speculative dinosaur project. With lots of fluff, parental care and mammalian-level intelligence, and the odd sophont. | |
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| Pando | Apr 1 2010, 11:35 PM Post #21 |
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Obey or I'll send you to the moon
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I'm not exactly sure what bauplan means, but I have 4 creatures ready to scan. They should be up by tomorrow. |
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| Margaret Pye | Apr 2 2010, 12:06 AM Post #22 |
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Adult
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Um... basic body design. Like, how many legs do they primitively have (losing legs is easy, growing legs is difficult unless the creature's segmented), do they have anuses, where's the brain... that kind of thing. |
| My speculative dinosaur project. With lots of fluff, parental care and mammalian-level intelligence, and the odd sophont. | |
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| Pando | Apr 2 2010, 12:21 AM Post #23 |
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Obey or I'll send you to the moon
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Well, they reproduce by openable holes usually at the base of their tail. I don't know where they defacate. And neither do I know where their brain will be, but probably near the front or back legs, where it'll be better for locomotion. Of course these are for the radial symmetrical life. There is a class of tridial symmetrical (if that the correct word) tripods. --EDIT-- I have the concepts up. It's pretty big so I put it up as a spoiler (the full size is 3186 x 2187, but this one is 1280x879 pixels). Spoiler: click to toggle From top left to bottom left (counter clockwise): An herbivorous tripod, a carnivorous quintapod, a tripod megaherbivore with trilateral symmetry, and a hexapod predator. Edited by Pando, Apr 2 2010, 02:15 AM.
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| colddigger | Apr 2 2010, 02:15 AM Post #24 |
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Joke's over! Love, Parasky
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I think tridially symmetrical falls under radially symmetrical... unless you are planning something truly bizarre... |
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Oh Fine. Oh hi you! Why don't you go check out the finery that is SGP?? v Don't click v Spoiler: click to toggle | |
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| Pando | Apr 2 2010, 02:21 AM Post #25 |
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Obey or I'll send you to the moon
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Isn't radial symmetry 2 sided? And I forgot to say, but the trilateral herbivore had 3 pairs of eyes instead of the usual 2 found on other creatures. And I plan to go bizarre for trilateral symmetrical creatures, including a tripodal animal similar to the Gigantus from the Morae River. Spoiler: click to toggle
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| XxVENATOURxX | Apr 2 2010, 03:43 AM Post #26 |
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I am the predator -o_O
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why u gunna go bizzare for trilateral symmetrical creatures. |
![]() Mae hen wlad fyn ghadau yn anwyl I mi Gwlad beirdd a chantorion enwogion o fri Ei gwrol ryfelwyr gwlad garwyr tra mad Dros ryddid collasant ei gwaed Gwlad,Gwlad Pleidiol wyf i'm gwlad Tra mor yn fyr i'r byr hoff bau O byddedd i'r heniaeth barhau | |
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| Margaret Pye | Apr 2 2010, 06:19 AM Post #27 |
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Adult
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So a lot of them also have tails? |
| My speculative dinosaur project. With lots of fluff, parental care and mammalian-level intelligence, and the odd sophont. | |
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| Pando | Apr 2 2010, 10:06 AM Post #28 |
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Obey or I'll send you to the moon
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Yes, it acts as a counter balance. And I like going bizarre. Makes it an alien planet. |
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| Empyreon | Apr 2 2010, 11:42 AM Post #29 |
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Are you plausible?
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Technically speaking, radial symmetry involves a repeated symmetry circling around a central axis. This can be expressed with two, three, four, five, or more symmetrical iterations. This is the correct term for the three-limbed creature. Bilateral symmetry is, specifically, 'two sided'. The symmetry isn't expressed around an axis, but on either side of a central plane. Trilateral symmetry, by extension, would be three sided. I'm trying to get my head around how those three sides would fit together. Also, I'm wondering about the position of some of those odd limbs in the picture. Is that extra limb off to one side, or somewhere in the middle? If it's off to the side, why did the species develop such unbalancing asymmetry? If it's in the middle, how, in particular, does the quintapod walk with a fifth limb in the middle like that? |
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Take a look at my exobiology subforum of the planet Nereus! COM Contributions food for thought
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| Pando | Apr 2 2010, 11:50 AM Post #30 |
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Obey or I'll send you to the moon
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I could always put it to the back. After all these are just concepts, not finalized creatures. |
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