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RE: [dinosaur] New Konzhukovia species (temnospondyl) from Permian of South America + Early Triassic polar coprolites + more papers


From: dinosaur-l-request@usc.edu [mailto:dinosaur-l-request@usc.edu] On Behalf Of Anthony
Sent: Wednesday, April 13, 2016 6:05 AM

> > It doesn't mean we have to include Deinodon in an analysis, only that we have to use evidence to place it somewhere in a phylogeny. Maybe that would be morphometric evidence, as that's commonly used based on expansions of Smith's tooth
> > measurement sample. Of course adding Deinodon to a phylogenetic analysis is itself scientifically interesting- to tell us something quantitative about where it belongs in the tree of life.
> As we all know, _Deinodon_ is known from a handful of teeth that Leidy
> decided to dignify with a name. The fact that _Deinodon_ has a name
> is the only reason it gets any attention at all. I'm not certain how
> "scientifically" interesting plugging it into an analysis would be. I
> suspect it might be a grand waste of time.


>Wait...are teeth no longer considered adequate to distinguish one species or genus from



In this case, yes. Nature isn’t about absolutes. Teeth can be diagnostic to the species level in one part of the tree and pretty much useless in taxonomy in another part.


> Jocelyn Falconnet <j.falconnet@gmail.com> wrote:
> > If we have to forget names based on nomina dubia... what about
> > ceratopsians and other Ceratops-derived names ?
> We're only talking about coordinated family-level names
> (superfamily/-oidea, family/-idae, subfamily/-inae, tribe/-ini).


>that seems rather arbitrary...why stop there?  if we're supposed to give that up on Family-level, > why not on the other levels too?

It is arbitrary, but that is where the rules of the ICZN ended.


Thomas R. Holtz, Jr.
Email: tholtz@umd.edu         Phone: 301-405-4084
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