On the News | Ancient reptile mystery solved as 2 extinct species found to be the same @ EurekAlert!


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Title: 

Ancient reptile mystery solved as 2 extinct species found to be the same


Excerpt:

Artwork with ‘bait ball’ Ichthyosaur. Credit: Julio Lacerda (@source)

“Ichthyosaurs, which are similar-shaped to dolphins and sharks, but are reptiles, swam the seas for millions of years during the Triassic, Jurassic and Cretaceous periods. They were the first, large extinct reptiles brought to the attention of the scientific world.

Dean Lomax, a palaeontologist and Honorary Scientist at The University of Manchester, working with Professor Judy Massare of Brockport College, New York, have studied thousands of ichthyosaur fossils and have delved through hundreds of years of records to solve an ancient mystery.

Many ichthyosaur fossils were found in England during the early 19th century, but it was not until 1821 that the first ichthyosaur species was described – called Ichthyosaurus communis. This species has become one of the most well-known and iconic of all the British fossil reptiles. A sea of Ichthyosaurus fossils can be seen on display at the Natural History Museum, London.

In 1822, three other species were described, based on differences in the shape and structure of their teeth. Two of the species were later re-identified as other types of ichthyosaur, whereas one of these species, called Ichthyosaurus intermedius, was still considered closely related to I. communis.

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In the years that followed, many eminent scientists, including Sir Richard Owen (the man who coined the word dinosaur), studied ichthyosaur fossils collected from Dorset, Somerset, Yorkshire and other locations in England. Their studies and observations of Ichthyosaurus communis and I. intermedius resulted in confusion with the species, with many skeletons identified on unreliable grounds.” (…) READ MORE