EGU Blogs

Atoposauridae

Nessie dwarfed by new Scottish crocodile

Yes, Nessie had to be in the title. Am I sorry? A little. But not enough to not use it.

Colleagues from the University of Edinburgh and myself have described the first Scottish crocodile fossil! It’s from the Isle of Skye, from a time known as the Middle Jurassic, and dates back around 160 million years ago. Based on a partial bit of a jawbone (the dentary), it’s hardly the most spectacular fossil we’ve ever found, but it tells quite a neat story.

Based on the features we could identify of the jawbone, we were able to identify the specimen as belonging to Theriosuchus. This genus has quite a complicated history, and currently 5 species are assigned to it that span some 100 million years! That’s pretty long lived for a single genus. Theriosuchus belongs to a group known as Atoposauridae, which based on our current understanding went extinct along with the non-avian dinosaurs at the end of the Cretaceous period.

[Read More]

Dwarf crocodiles are the cutest, even if they’ve been dead for 150 million years..

Dwarf crocodiles are the cutest, even if they’ve been dead for 150 million years..

Europe 150 million years ago must have been a brilliant place to go on holiday. Tropical islands, warm lagoons to bathe, a warm climate, and nine metre long crocodiles noshing on anything that couldn’t swim fast enough. Ok, so maybe not that great for humans, but if you were an ancient archosaur, living alongside dinosaurs and other now extinct animals, life must have been pretty sweet.

These giant crocodiles were known as metriorhynchids, and were fully adapted to swim in the seas. Living alongside them, though, were smaller but by no means less impressive crocodiles known as atoposaurids. These are the cute little, but unfortunately extinct, guys I’ve been studying as part of my PhD for the last couple of years, and they are some of the best preserved fossil crocodiles we’ve got.

Alligatorellus bavaricus, newly named from Bavaria, Germany. Tennant and Mannion (2014)

Alligatorellus bavaricus, newly named from Bavaria, Germany. Tennant and Mannion (2014)

[Read More]

Crocodiles! They’re everywhere!

The Natural History Museum in London contains some of the most diverse vertebrate Palaeontological collections in the world, in terms of number of species. As part of my PhD, I have to learn detailed crocodile anatomy, mostly skeletal (osteology), to help identify and describe the particular group I’ll be researching into. The Zoology Department would normally be a great target to go and learn this, but for reasons undisclosed, they were unavailable for research visits. Fortunately, Lorna Steel, a curator of the fossil vertebrates, informed me that they had some extant croc material I could come and play with! Seeing as Imperial College is next door to the NHM, I trotted off to have a peak.

Croc 1 – Guesses as to species below! (click for larger image) Copyright: Natural History Museum