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** As of episodes 13 and 14, some species have indeed become quadrupedal.
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** This has been technically done with the onychodonts, who have become hexapedal instead of octopedal by way of centaurism.
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** This has been technically done with the onychodonts, onychodonts and later the allobrachids, who have become hexapedal instead of octopedal by way of centaurism.
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** Also, this is a planet with slightly less gravity on Earth and thus might make creatures with lesser legs be prone to toppling over.
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** Also, this is a planet with slightly less gravity than on Earth and thus might make creatures with lesser legs be prone to toppling over.
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** Also, this is a planet with slightly less gravity on Earth and thus might make creatures with lesser legs be prone to toppling over.
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** Besides, Biblaridion has already explained that while fewer limbs is more energy efficient, it is also less structurally stable.
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** That's evolution for you. Just because you can ''imagine'' a helpful adaptation for a specific situation doesn't necessarily mean that the pertinent mutation is going to develop. Take the human body, for example: it would be totally nice if the blood vessels for our retinae ran along the outer surface rather than the inner, or if the drainage hole for our sinuses were located on the bottom rather than the top. Evolution is like a card game: you have to play whatever hand the RandomNumberGod decides to deal you.
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** This has been technically done with the onychodonts, who have become hexapedal instead of octopedal by way of centaurism.
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* How come the coleostracans are the only tentaclostome species to internalize their shell? It would be extremely useful as internal support for the entire group, and we know from the opisthopterans that they can even extend part of their skeleton into their limbs for extra support.
* Wouldn't it make sense for at least some of the osteopod species to reduce some of their legs, if not get rid of them completely? Limbs are energetically expensive, especially for large animals.
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* Wouldn't it make sense for at least some of the osteopod species to reduce some of their legs, if not get rid of them completely? Limbs are energetically expensive, especially for large animals.
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