Skip to main content

Spinosaurus aegyptiacus

This is an old picture of Spinosaurus aegyptiacus. I drew this about four years ago using Windows Paint. These were the days before I discovered PhotoShop or Illustrator.

The anatomy may not be exactly correct as I'd only started palaeontology back then - I didn't do any anatomy for my undergrad...

Anyway, this was also about the time I started to get obsessed with spinosaurs. There was something about the skull morphology that really hooked me into them. In more poetic terms, you could say that I fell in love with the beauty of the slender and curvy silhouette of the snout. This was just purely an obsession of mine with no scientific context whatsoever.

Still, I find it quite intriguing that we find rather derived or highly specialised forms such as spinosaurs but no transitional forms. We don't have good fossils that show the evolution of such unique skull morphology...then again, basal tetanuran fossil record is pretty scrappy anyway - for instance Chilantaisaurus tashuikouensis is a giant theropod from China that is supposedly closely related to spinosaurs or maybe even belong to the Spinosauridae but it is only known from partial hindlimbs and a humerus (and maybe a few bits and bobs - I can't remember off the top of my head). So not much of the skull I'm afraid...

Comments

traumador said…
Yeah Spinosaur

He looks good to me... No major problems I can see with his anatomy.
Zach said…
From what I've read, Megaraptor might also be a primitive spinosauroid. It's just such a shame that Middle Jurassic theropods are so horribly unknown, and I'm with you--I'd love to see the transition between megalosaur and crocodile mimic!

Popular posts from this blog

Spinosaurus, the gigantic pangolin of the Cretaceous?

I was made aware of this not long ago - it kind of looks creepy, but it gave me an idea: Did Spinosaurus walk like a pangolin? That is, with it's hands low to the ground but not touching the ground - so no knuckle walking - and maintaining balance as a biped... This pangolin seems to maintain balance on its hind legs even though, on cursory glance, its centre of mass seems too far forward for that. Spinosaurus is supposed to have had a dense femur, so maybe its centre of gravity was farther back than you'd think from overall proportions. Maybe the sail helped tip the scale back? ...or maybe it was a giant ant-eater? Those giant claws look particularly suited to breaking open termite mounds? Who knows. This is me being silly, but thought it was hilarious enough to share...

The difference between Lion and Tiger skulls

A quick divergence from my usual dinosaurs, and I shall talk about big cats today. This is because to my greatest delight, I had discovered today a wonderful book. It is called The Felidæ of Rancho La Brea (Merriam and Stock 1932, Carnegie Institution of Washington publication, no. 422). As the title suggests it goes into details of felids from the Rancho La Brea, in particular Smilodon californicus (probably synonymous with S. fatalis ), but also the American Cave Lion, Panthera atrox . The book is full of detailed descriptions, numerous measurements and beautiful figures. However, what really got me excited was, in their description and comparative anatomy of P. atrox , Merriam and Stock (1932) provide identification criteria for the Lion and Tiger, a translation of the one devised by the French palaeontologist Marcelin Boule in 1906. I have forever been looking for a set of rules for identifying lions and tigers and ultimately had to come up with a set of my own with a lot of help...

Maximum bite force in Tyrannosaurus rex

I'm on a roll today. Might as well post another. So obviously, this is a Tyrannosaurus rex . It's so famous I'm afraid I don't really know what else to write about. Oh well, I'll just ramble on about bite forces then. T. rex has been the focus of many biomechanical studies. Bite force is no exception. However, as much of a celebrity T. rex is, as far as I'm aware, there have only been two studies so far that have attempted to estimate the bite force of T. rex : Erickson et al. (1996) and Meers (2002). Erickson et al. (1996) had an interesting approach of reproducing bite marks using cast replicas of a T. rex tooth and ramming it into a cow bone. They recorded the forces needed in order to penetrate the bone to different depths. The depths of T. rex bite marks found on a Triceratops ilium was compared to this relationship of puncture depth and forces needed. As a result they found out that a bite force of 6.4 kN were needed in order to to make that bite mar...