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Re: Ceratonykus braincase described
Extant myrmecophages are not cursorial, because the energy derived
from a myrmecophagous diet does not permit high metabolic rates in
mammals higher than 1 kg mass (McNab, 1984; J. Zool. Lond. 203:
485-510). Termites have higher calorific value than ants, but still
That could explain why parvicursorines are so unusually small... but
they're not _that_ small, are they? And *Patagonykus*, of course, had a
decent size. Too bad its skull is unknown; but it didn't have as extreme
forelimbs as the parvicursorines.
For _Patagopteryx_ read _Patagonykus_...
<headdesk> Yes, thank you.
Thanks also for posting the reference to Senter (2005). That's what I
had in mind.
If alvarezsaurs were myrmecophagous, I doubt that ants and termites
were their ONLY source of food - for the reasons given above. They
may in fact have been a relatively minor component of alvarezsaur
Didn't this thread start as a discussion of the function of the
forelimbs? :-) That they were used to break termite nests open doesn't
mean the animal ate nothing else. Though the tiny teeth may constrain
the options for what else they ate.