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Re: Saurolophus skin impressions show species distinctions
This is really cool. I'm wondering about the thickness of skin and how it
hangs on the animals. Is it tight like a horse or sagging like an elephant or
bunching up like a komodo dragon. I recall there was a paper that described
sub dermal properties of Psittacosaurus skin. It showed that they were kind
of chubby! I suppose some skin wrinkle features that occur on mummy specimens
could happen post-mortem as well.
On Feb 4, 2012, at 12:06 AM, Mickey Mortimer wrote:
> I normally don't care much for papers that aren't phylogenetic or
> osteological, but I gotta say this is one of the coolest I've read. It's
> amazing we have the material to describe interspecific differences in
> integument and possible coloration. I'd love to see a similar comparison
> between Saurolophus and other hadrosaurid genera with skin impressions.
> Mickey Mortimer
>> Date: Fri, 3 Feb 2012 21:26:57 -0800
>> From: firstname.lastname@example.org
>> To: email@example.com
>> Subject: Saurolophus skin impressions show species distinctions
>> From: Ben Creisler
>> New in PLoS ONE:
>> Bell, P.R. (2012)
>> Standardized Terminology and Potential Taxonomic Utility for
>> Hadrosaurid Skin Impressions: A Case Study for Saurolophus from Canada
>> and Mongolia.
>> PLoS ONE 7(2): e31295
>> The characterization of palaeospecies typically relies on hard-tissue
>> anatomy, such as bones or teeth that is more readily fossilized than
>> soft parts. Among dinosaurs, skin impressions are commonly associated
>> with partial and complete hadrosaurid skeletons, and consist of
>> non-imbricating tubercles or scales. Skin impressions from various
>> parts of the body of two species of the hadrosaurine Saurolophus (S.
>> angustirostris from Mongolia and S. osborni from Canada) are described
>> from multiple specimens. These species, recently validated on
>> osteological grounds, can be differentiated based solely on
>> soft-tissue anatomy, namely scale shape and pattern. This study
>> demonstrates for the first time the applicability of soft-tissue
>> (i.e., scale impressions) as a means to differentiate species within
>> the Dinosauria. Differences are most spectacular in the tail, where S.
>> angustirostris is differentiated by the presence of vertical bands of
>> morphologically distinct scales, a grid-like arrangement of circular
>> feature-scales, and tabular scales along the dorsal midline.
>> Preliminary results indicate scale architecture remained consistent
>> throughout ontogeny in S. angustirostris. These results support
>> previous assertions that hadrosaurid scale architecture has a positive
>> phylogenetic signal. As such, future taxonomic descriptions should
>> include, where possible, the standardized description of skin
>> impressions including the position and orientation of these
>> impressions on the body.