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Re: Size of *Neoceratodus africanus* and/or *N. tuberculatus*
David Marjanovic wrote:
> Also, there's evidence from jaw mechanics, too, that
> spinosaurs were "herons from hell".
I agree that spinosaurids were heron-like in their generalist-predator
abilities; but they were not at all heron-like in their wading abilities. I
don't doubt that _Spinosaurus_ could have preyed upon giant lungfish or
coelacanths in its habitat. These mega-fish certainly offered a huge source of
protein to a predator. But I do very much doubt that _Spinosaurus_ was
*specialized* for feeding on fish like these.
If _Spinosaurus_ was a dedicated piscivore with a preference for lungfish or
coelacanths, why doesn't it show any aquatic/wading adaptations? Instead, the
postcranium tells us that spinosaurs were dryfooted landlubbers. I'm aware
that grizzly bears, which are terrestrial, are capable of catching fish from
the shoreline - but it doesn't feed on fish all of the time.
And as I said previously, the closest example of a modern bird that specializes
in catching lungfish is the shoebill. Morphologically, there's not a whole lot
similar between a spinosaur and a shoebill, either cranially or postcranially.
(BTW, thanks for the links!)