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RE: Stenopterygius (Ichthyosauria) species



I would _love_ a copy of this paper, if anyone can oblige.

Cheers,

  Jaime A. Headden
  The Bite Stuff (site v2)
  http://qilong.wordpress.com/

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


"Ever since man first left his cave and met a stranger with a
different language and a new way of looking at things, the human race
has had a dream: to kill him, so we don't have to learn his language or
his new way of looking at things." --- Zapp Brannigan (Beast With a Billion 
Backs)


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> Date: Wed, 28 Dec 2011 10:31:45 -0800
> From: bscreisler@yahoo.com
> To: dinosaur@usc.edu
> Subject: Stenopterygius (Ichthyosauria) species
>
> From: Ben Creisler
> bscreisler@yahoo.com
>
> New in January 2012 Journal of Paleontology:
>
>  Erin E. Maxwell (2012)
> New Metrics To Differentiate Species of Stenopterygius (Reptilia: 
> Ichthyosauria) from the Lower Jurassic of Southwestern Germany.
> Journal of Paleontology 86(1):105-115
> doi: http://dx.doi.org/10.1666/11-038.1
> http://www.bioone.org/doi/abs/10.1666/11-038.1
>
> Ichthyosaurs represent one of the most highly specialized lineages of marine 
> reptiles, but our understanding of the evolution of this group is based on 
> specimens found at a surprisingly small number of stratigraphic intervals and 
> localities. The Lower Jurassic (Toarcian) Posidonia Shale of southwestern 
> Germany is one of the richest ichthyosaur-bearing formations in the world and 
> has produced thousands of skeletons, including specimens with preserved soft 
> tissue, and fetal remains inside the body cavity. The most abundant 
> ichthyosaur genus in the Posidonia Shale is Stenopterygius. In spite of 
> almost 200 years of research effort, the number of species in this genus is 
> still a point of active disagreement in the literature. Here, bivariate and 
> multivariate analyses are used to classify both articulated and 
> disarticulated skeletons to the level of species, using measurement data from 
> individual cranial and postcranial elements. Unlike previous classification
> attempts, this technique pinpoints ontogenetically conserved differences in 
> size and proportion between the species, and so can be applied to adult, 
> subadult, and neonatal specimens. Using this method, three species of 
> Stenopterygius, S. quadriscissus, S. triscissus, and S. uniter are 
> differentiated.