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Re: Bathygnathus is Dimetrodon

Do they suggest an appeal to the ICZN to use its plenary powers and
set aside Bathygnathus? Because I'd rather a pro forma on the subject
than just "a reversal of precedent."

On Mon, Nov 23, 2015 at 8:44 AM, Ben Creisler <bcreisler@gmail.com> wrote:
> Ben Creisler
> bcreisler@gmail.com
> A new paper:
> Kirstin S. Brink, Hillary C. Maddin, David C. Evans & Robert R. Reisz (2015)
> Re-evaluation of the historic Canadian fossil Bathygnathus borealis
> from the Early Permian of Prince Edward Island.
> Canadian Journal of Earth Sciences (advance online publication)
> doi: 10.1139/cjes-2015-0100
> http://www.nrcresearchpress.com/doi/abs/10.1139/cjes-2015-0100?src=recsys#.VlNBn3arTcs
> The holotype and only known specimen of Bathygnathus borealis is a
> partial snout with maxillary dentition of a presumed sphenacodontid
> from the Lower Permian (Artinskian 283–290 Ma) redbeds of Prince
> Edward Island, Canada. Due to its incomplete nature, assessment of the
> taxon’s systematic position within a cladistic analysis had never been
> performed. However, recent recognition of the phylogenetic utility of
> tooth characters in sphenacodontids now allows for a modern
> phylogenetic evaluation of B. borealis. Results show that B. borealis
> is the sister taxon of Dimetrodon grandis, which is supported by
> dental characters: crowns with mesial and distal denticles and roots
> elongate, lacking plicidentine. An autapomorphy of B. borealis is the
> large facial exposure of the septomaxilla. As Bathygnathus has
> priority over Dimetrodon in the scientific literature, we suggest a
> reversal of precedence is required to preserve the familiar name
> Dimetrodon and to maintain universality, thus recognizing the new
> species Dimetrodon borealis.
> ==
> News release:
> http://drexel.edu/now/archive/2015/November/Dimetrodon_Discovery/

Jaime A. Headden
The Bite Stuff: http://qilong.wordpress.com/

"Innocent, unbiased observation is a myth" - P. B. Medawar (1969)