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Re: Tetrapod note (was: Re: [Re: Resting Sauropods])
Jeff Poling wrote:
> At 12:24 PM 7/17/98 -0600, Jonathan R. Wagner wrote:
> >Date: Thu, 16 Jul 1998 10:41:36 -0700
> >Ralph Miller III wrote
> >>So, as you can see, the colloquial (dictionary) meanings of "tetrapod" and
> >>"reptile" differ markedly from the cladistic meanings. And it is proper to
> >>refer to a bird as a "reptile" and a "tetrapod," whether you feel
> >>comfortable with such labels or not.
> > I was under the impression that in general
> >biological/paleobiological circles (irrespective of cladistics), birds and
> >snakes were considered tetrapods, as tetrapod referred to animals which
> >share a four limbed heritage. Thus, amniotes, lissamphibia, and everything
> >down to something like _Ichthyostega_ were all tetrapods. Was I wrong?
> You don't seem to be wrong. My take on the whole issue was that the
> original poster misremembered the proper term for an animal that uses four
> limbs for terrestrial locomotion, quadruped, as tetrapod.
> Hmmm....would a mosasaur or plesiosaur be considered quadrupeds given
> they weren't terrestrial? How would penguins be classified given they are
> bipeds on land, but use their forelimbs for locomotion in water?
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