[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Re: Archaeopteryx skull redescribed and reconstructed

Got it, thanks for all who sent it along!


On Fri, Jun 7, 2013 at 1:04 PM, Thorsten Brand <thorstenbrand@gmx.net> wrote:
> If someone could share a copy, I'd be very interested, too.
> Thanks!
> -Thorsten
> On 07.06.2013 19:38, Scott Hartman wrote:
>> It appears my institutional access doesn't include Paläontologische
>> Zeitschrift - does anyone happen to have a copy of this?
>> Thanks!
>> -Scott
>> On Fri, Jun 7, 2013 at 10:38 AM, Ben Creisler <bcreisler@gmail.com> wrote:
>>> From: Ben Creisler
>>> bcreisler@gmail.com
>>> A new online paper:
>>> Oliver W. M. Rauhut (2013)
>>> New observations on the skull of Archaeopteryx.
>>> Paläontologische Zeitschrift (advance online publication)
>>> DOI: 10.1007/s12542-013-0186-0
>>> http://link.springer.com/article/10.1007/s12542-013-0186-0
>>> Although skeletal remains of the iconic oldest known avialian
>>> Archaeopteryx have been known for almost 150 years, several aspects of
>>> the cranial anatomy of this taxon have remained enigmatic, mainly
>>> because of the strongly flattened and often fractured and incomplete
>>> nature of available skull materials. New investigation of the skulls
>>> of the recently described, excellently preserved tenth (Thermopolis)
>>> and the seventh (Munich) specimens revealed several previously
>>> unrecognized characters and helps to resolve some problematic issues.
>>> Thus, the nasal of Archaeopteryx shows a lateral notch for the
>>> lacrimal, as is found in many other saurischian dinosaurs, the maxilla
>>> clearly participates in the margin of the external nares, and there
>>> seems to be a pneumatic foramen in the lacrimal, comparable to the
>>> lacrimal fenestra found in many non-avian theropods. In the braincase,
>>> Archaeopteryx shows pneumatic features reminiscent of non-avian
>>> theropods, including a ventral basisphenoid recess and an anterior
>>> tympanic recess that is laterally incised into the
>>> basisphenoid/prootic. Most importantly, however, the postorbital
>>> process of the jugal shows a facet for the suture with the
>>> postorbital, thus resolving the question of whether Archaeopteryx had
>>> a closed postorbital bar. A new reconstruction of the skull of
>>> Archaeopteryx is presented, making the skull of this taxon even more
>>> theropod-like than previously recognized. Furthermore, the closed
>>> postorbital bar and the configuration of the bones of the skull roof
>>> cast serious doubt on claims that an avian-style cranial kinesis was
>>> present in this taxon.

Scott Hartman
(608) 620-4030
website: www.skeletaldrawing.com
blog: http://skeletaldrawing.blogspot.com/