EGU Blogs

Dinosaurs

Theropod skulls: a note of caution

Morphometrics is a horrible word, but refers to a technique that is gaining increased traction in palaeontology in recent years. It essentially is a way of measuring anatomy, or specific aspects of anatomy. An extension of it is called geometric morphometrics, and this relies on using co-ordinate points on fossils to analyse things like shape variation.

The newly minted Dr Christian Foth had a study out earlier this year that did a kind of meta-analysis of morphometrics, using theropod skulls (the group including dinosaurs like T. rex and Troodon, as well as modern birds) as an example. A lot of research has gone into using morphometrics to look at patterns in theropod skull variation through time, as looking at these evolutionary patterns is not only awesome, but can also tell us about their ascent to success through time.

[Read More]

A double-whammy of dinosaur awesomeness. Pun totally intended.

This is a post about pachycephalosaurs. It’s not a post about feathered dinosaurs, huge dinosaurs, or any of the ones which you may be more familiar with from popular media. Pachycephalosaurs were the dome-headed little scrappers of the Cretaceous, around 85 to 66 million years ago. Their name means ‘thick-skulled lizard’ (pachy: thick, cephalon: skull, saurus: lizard), and they were a small group within the larger herbivorous group of dinosaurs called ornithischians.

It’s probably fair to say that these dinosaurs are one of the least popular groups; they didn’t have razor sharp teeth and sickle-switchblade claws, they didn’t grow to the size of houses, and they didn’t have rows of armoured shields and spikes along their backs. What they did have, however, is an unusual behaviour that signifies them as unique, and pretty amazing, beasties.

Fig.1 – A pachycephalosaur suffering an ‘ouchie’, or cranial lesion (PLoS)

Fig.1 – A pachycephalosaur suffering an ‘ouchie’, or cranial lesion (PLoS)

[Read More]

SVP Day 3

OK, day 3, still alive.

The first session this morning was on saurischians dinosaurs, the major group that includes sauropods and theropods.

My supervisor, Phil Mannion, was the first talk I was awake enough for (*cough*), and gave us a run-through of sauropods from the infamous Late Jurassic (~150 million years old) Tendaguru formation from Tanzania. With new revisions, the sauropod fauna from here are remarkably similar in terms of higher taxa to sites known from Iberia, China, and the US, although only somphospondylans, a quite advanced group, are known from Tendaguru.

[Read More]

SVP Day 2

So again, I missed most of the morning, spending it in the UK Embassy getting an emergency passport. Unfortunately, this means most of the Romer Session, where early-career (thanks Phil for correction) students present for an award, was missed. Obviously, with the lack of Wi-Fi and live-tweeting, the session might as well have been conducted in a black hole.

I managed to catch the last talk though, on the evolutionary relationships (phylogeny) of diplodocoids sauropodomorphs. As these guys are quite an important constituent of Late Jurassic terrestrial ecosystems, figured this would be worth attending, and actually paying attention to.

[Read More]