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Re: Another query: Baryonyx a facultative quadruped?
The issue of quadrupedalism in _Baryonyx_ has, by and large, died a
death. There is no compelling evidence that spinosaurids were anything
other than terrestrial bipeds. Ditto for other large terrestrial
that have been regarded by some researchers as possible quadrupeds (e.g.,
Besides, both spinosaurids and *Xuanhanosaurus* don't have such long arms at
all, and there's no evidence they were able to twist their forearms -- which
means that they'd have had to walk like an anteater.