Navigation Links
Unusual fish-eating dinosaur had crocodile-like skull
Date:1/13/2008

An unusual dinosaur has been shown to have a skull that functioned like a fish-eating crocodile, despite looking like a dinosaur. It also possessed two huge hand claws, perhaps used as grappling hooks to lift fish from the water.

Dr Emily Rayfield at the University of Bristol, UK, used computer modelling techniques more commonly used to discover how a car bonnet buckles during a crash to show that while Baryonyx was eating, its skull bent and stretched in the same way as the skull of the Indian fish-eating gharial a crocodile with long, narrow jaws.

Dr Rayfield said: On excavation, partially digested fish scales and teeth, and a dinosaur bone were found in the stomach region of the animal, demonstrating that at least some of the time this dinosaur ate fish. Moreover, it had a very unusual skull that looked part-dinosaur and part-crocodile, so we wanted to establish which it was more similar to, structurally and functionally a dinosaur or a crocodile.

We used an engineering technique called finite element analysis that reconstructs stress and strain in a structure when loaded. The Baryonyx skull bones were CT-scanned by a colleague at Ohio University, USA, and digitally reconstructed so we could view the internal anatomy of the skull. We then analysed digital models of the snouts of a Baryonyx, a theropod dinosaur, an alligator, and a fish-eating gharial, to see how each snout stressed during feeding. We then compared them to each other.

The results showed that the eating behaviour of Baryonyx was markedly different from that of a typical meat-eating theropod dinosaur or an alligator, and most similar to the fish-eating gharial. Since the bulk of the gharial diet consists of fish, Rayfields study suggests that this was also the case for Baryonyx back in the Cretaceous.

Dr Angela Milner from the Natural History Museum, who first described the dinosaur and is co-author on the paper, said: I thought originally it might be a fish-eater and Emilys analysis, which was done at the Natural History Museum, has demonstrated that to be the case.

The CT-data revealed that although Baryonyx and the gharial have independently evolved to feed in a similar manner, through quirks of their evolutionary history their skulls are shaped in a slightly different way in order to achieve the same function. This shows us that in some cases there is more than one evolutionary solution to the same problem.

The unusual skull of Baryonyx is very elongate, with a curved or sinuous jaw margin as seen in large crocodiles and alligators. It also had stout conical teeth, rather than the blade-like serrated ones in meat-eating dinosaurs, and a striking bulbous jaw tip (or nose) that bore a rosette of teeth, more commonly seen today in slender-jawed fish eating crocodilians such as the Indian fish-eating gharial.

The dinosaur in question, Baryonyx walkeri, was discovered near Dorking in Surrey, UK in 1983 by an amateur collector, William Walker, and named after him in 1986 by Alan Charig and Angela Milner. It is an early Cretaceous dinosaur, around 125 million years old, and belongs to a family called spinosaurs.


'/>"/>

Contact: Cherry Lewis
cherry.lewis@bristol.ac.uk
44-117-928-8086
University of Bristol
Source:Eurekalert  

Related biology news :

1. Biologists find unusual plant gene: abstinence by mutual consent
2. Scientists learn structure of enzyme in unusual virus
3. Massive dinosaur discovered in Antarctica sheds light on life, distribution of sauropodomorphs
4. Dinosaur from Sahara ate like a mesozoic cow
5. Emory paleontologist reports discovery of carnivorous dinosaur tracks in Australia
6. New dinosaur species found in Montana
7. Human embryonic stem cell -- derived bone tissue closes massive skull injury
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Unusual fish-eating dinosaur had crocodile-like skull
(Date:4/6/2017)... , April 6, 2017 Forecasts ... ANPR, Document Readers, by End-Use (Transportation & Logistics, Government ... Oil, Gas & Fossil Generation Facility, Nuclear Power), Industrial, ... Other) Are you looking for a definitive ... ...
(Date:4/5/2017)... , April 5, 2017 Today HYPR ... that the server component of the HYPR platform is ... providing the end-to-end security architecture that empowers biometric authentication ... HYPR has already secured over 15 million users across ... manufacturers of connected home product suites and physical access ...
(Date:4/4/2017)... , April 4, 2017   EyeLock LLC ... announced that the United States Patent and Trademark Office ... broadly covers the linking of an iris image with ... transaction) and represents the company,s 45 th issued ... patent is very timely given the multi-modal biometric capabilities ...
Breaking Biology News(10 mins):
(Date:6/27/2017)... ... 2017 , ... Indiana-based Xylogenics announced today the release of ... The efficiencies created by the newest strain design will have an immediate ... wherein individual production plants are planning to invest upwards of $350 million annually ...
(Date:6/26/2017)... Va (PRWEB) , ... June 26, 2017 , ... The ... the use of health IT to create efficiencies in healthcare information exchange and a ... Donald W. Rucker, MD, head of the federal Office of the National Coordinator for ...
(Date:6/23/2017)... CARDIFF, UK (PRWEB) , ... June 23, 2017 , ... ... Brian Lula, president of Physik Instrumente USA, have been selected as this year’s recipients ... . , The two have been invited along with other honorees to accept their ...
(Date:6/22/2017)... (PRWEB) , ... June 21, 2017 , ... ... regional office in North Carolina, and engages Timothy Reinhardt to manage the new ... quality leadership at Pfizer Inc, with his most recent role as the Director ...
Breaking Biology Technology: