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Re: Gargantuavis neck vertebra

DNA is a very risky pointer for what constituted a de-facto species!
Dr. Heinrich Mallison
Abteilung Forschung
Museum für Naturkunde - Leibniz-Institut
für Evolutions- und Biodiversitätsforschung
an der Humboldt-Universität zu Berlin
Invalidenstrasse 43
10115 Berlin
Office phone: +49 (0)30 2093 8764
Email: heinrich.mallison@gmail.com
Fere libenter homines id quod volunt credunt.
Gaius Julius Caesar

On Thu, Jun 14, 2012 at 12:56 AM, David Marjanovic
<david.marjanovic@gmx.at> wrote:
> Gerald Mayr, who suggested that the original pelves could be pterosaurian,
> now agrees they're avian.
>>  After all, just a thousand years ago there were a whole lot of
>>  similar modest sized moa species crawling around New Zealand.
> DNA sez there were only nine moa species in total in the Pleisto- and
> Holocene, though with enormous sexual size dimorphism for *Dinornis maximus*
> (the big North Island species) and *Dinornis robustus* (the big South Island
> species).
>>  Who knows how many gargantuavid (not sure if this is the family name,
>>  too lazy to check) species and genera were wandering around on the
>>  island/s (not sure how many there were, too lazy to check) of
>>  Campanian/Maastrichtian southern France. Must have been a number of
>>  them if that Darwin was right about evolution of the species.
> Under which species concept(s)?
> Of course, Buffetaut & Angst didn't specify one either.
>>  Chucking isolated material into a species is more often than not a
>>  very bad habit that we need to stifle yourselves on. Like tossing all
>>  Triceratops random bones into T. horridus when it now looks like
>>  there are two or more species separated stratigraphically.
> Separated? My impression was they're continuous (according to Scannella and
> Fowler), with gradual anagenetic change, so that the questions become where
> _and if_ you want to draw lines -- in other words, which species concept to
> choose.