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Re: P/T extinction linked to global warming
David Marjanovic (firstname.lastname@example.org) wrote:
<However... what if the dicynodont maxilla is actually a ceratopsian
premaxilla? Even without *Serendipaceratops*, this would be less bizarre
than a K dicynodont.>
Well, for starters, the authors of the study, Thulborn and Turner, note
that the bone (identified as a maxilla) has a large procumbent tusk in it,
lacking in any dinosaur save *Heterodontosaurus.* The CT anatomy shows
herring-bone banding of dentine with a characteristic interface seen also
in *Dinodontosaurus.* Similar, as noted nearly identical maxillae are
known from Antarctica and are accepted as dicynodont, including referral
to *Lystrosaurus.* There is no side of a lateral or ventral tomus to
indicate the prescence of a near-concordant cutting edge with the bone,
either rostral or caudal to the tusk. In it's anatomy, it appears to
perfectly coincide with dicynodont anatomy.
I have the paper if anyone is interested.
Jaime A. Headden
Little steps are often the hardest to take. We are too used to making leaps
in the face of adversity, that a simple skip is so hard to do. We should all
learn to walk soft, walk small, see the world around us rather than zoom by it.
"Innocent, unbiased observation is a myth." --- P.B. Medawar (1969)
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