Dinosaur Evolution: A Journey from Tetrapod to Bird

I will contact Lord Tyrant and maybe Raptor-401.

sweet!

finished

As much as I love Jurassic-Cretaceous dinosaurs, I find earlier Triassic Dinosaurs more fascinating because of their more basal routes and I'm fascinated with early dinosaur evolution. I know its easier to love Utahraptor, Tyrannosaurus, Velociraptor, Triceratops, Apatosaurus, Parasaurolophus, Ankylosaurus, Stegosaurus, Brachiosaurus, or even Spinosaurus but Triassic dinosaurs were like the great grand parents of the more famous dinosaur clades.

Yeah! My favorite Triassic dinosaur is Gojirasaurus quayi! For the Jurassic i must say Allosaurus and finally for the Cretaceous period Spinosaurus who's also my favorite dinosaur. I also like Styracosaurus and Brachiosaurs.

Ah Gojirasaurus, a rather large Coelophysoid. Hey its not too distant from my favorite dinosaur, Dilophosaurus.

Yup! I love Gojirasaurus because as a Coelophysoid it is HUGE!! Like Godzilla as you see in my profile pic.

Hey it might of had competition with another large coelophysoid Liliensternus. although my Dilophosaurus is bigger but Dilophosaurus is an Early Jurassic Theropod with the body of a Late Triassic Theropod. Dilophosaurus a while back was considered to be a Coelophysoid before being placed in its own clade Dilophosauridae.

Yeah.

Gojirasaurus is my favourite Triassic dinosaur

cool.

No updates Xeno?

Sorry, I will update soon. I'm trying to think which Dinosaur linage/clade to do next.

Ok

Any Suggestions?

Maybe the Pterosaurs?

Well that's outside of Dinosauria Evolution but they are both Avemetatarsalia

Mmmhhm

Hey I know I will discuss Spinosaurid evolution

Spinosaurids: My opinion on them is this, as an animal and part of dinosaur evolution I do find them fascinating since they seem to of been gradually evolving in to aquatic animals and had not the early late cretaceous waters been Anoxic (de-oxygeniated) during the Cenomanian-Turonian boundary event, we possibly would of seen fully aquatic dinosaurs. However as far as popular portrayal of the Spinosaurus goes, I despise the Jurassic Park III and Planet Dinosaur's depictions of the Spinosaurus.

Just to clarify: I have nothing against the real animal that is Spinosaurus aegyptiacus, Now on to Spinosauridae evolution.

Okay well Spinosaurids belong to the superfamily Megalosauroidea which were a group of stiffed tailed Theropods or tetanuran that reached to medium to large porportions before the Avetheropods (Bird-aligned tetanurans) such as Allosaurus, Tyrannosaurus, and the Haast's Eagle. But before we get in to the them ( i would like to get in to a more detailed with T. rex evolution later, I feel that my explanation was too brief), lets refocus on the Spinosaurids.

Most basal spinosaurids weren't that impressive, such as Ostafrikasaurus, It had a slight elongated snout and a slightly high spines but it closely resembled its megalosaurian cousins. however it is believed to be closer to the baryonyx-line of the Spinosaurids and then there is Siamosaurus who is another basal spinosaur but it had a longer snout than its cousin Ostafrikasaurus and its teeth resembled that of Spinosaurus. Sinopliosaurus, a Chinese basal Spinosaurus that was originally thought to be a pliosaurus that is only known for its collection of teeth which resembles Thailand's Siamosaurus, which quite possibly could be a synonyms. There is another possible basal spinosaurid that has yet to be named that's remains were found in Australia.

Okay now were don with the basal members time to move on to their more advanced relatives the subfamilies Baryonychinae and Spinosaurinae. Starting with the Baryonychinae:

Ichthyovenator, a basal baryonchina spinosaurid that's remains were discovered in Laos.

Baryonyx, one of the two most famous members of its subfamily. Discovered in England this Spinosaurid, it may have hunted near lakes or river deltas.

Suchomimus, the second of the two most famous member of its subfamily. Discovered in Niger Africa, this spinosaurid is larger than baryonyx and had a short pronounced spinal ridge.

Cristatusaurus, a baryonchinae spinosaurid that maybe be a Suchomimus or its own genus.

Suchosaurus, it maybe a Baryonyx.

Okay now for the Spinosaurinae:

Irritator, despite being a close relative to Spinosaurus, it lacks the signature spine of its cousin and it was a lot smaller. Its remains were discovered in Brazil.

Sigilmassasaurus (formerly Spinosaurus maroccanus) it unlike its larger cousin, Sigilmassasaurus lived primarily on land. Its remains were discovered in Morocco, Africa.

Spinosaurus, discovered in Egpyt, Africa. One of the most bizarre theropods, with its crocodilian head combined with its rather large sail-like protrusion of its spine and now as of 2014, a quadruped. It quite possibly lived a semi-aquatic lifestyle along side crocodilians who they may of competed for fish, on the land the Spinosaurus was rivaled by the allosauroid Carchardontosaurus. 

Oxalaia, little can be said of this spinosaurid as its fossils have yet to be completed and it was discovered in Brazil.

I love Spinosauridae! The Baryonichinae evolution is very interesting. Also i agree with you as much as i love Jurassic Park 3 and Planet Dinosaur, their description of our Spinosaurus is wrong. If you see the photos of Stromer (i spelled his name right?) the fossils were OVERSIZED!! I have the National Geographic journal of the 2014 Spinosaurus with me and Ibrahim's decription is quite good and respects the laws of physics as for the size and posture. Also if we should have more animals than dinosaurs! Like the marine reptiles and the flying reptiles. Thanks Xeno for posting the Spinosaurid evolution :D!

Your welcome, I'm sure I could expand the Topic soon.

Also this post is expanding my knowledge on Dinosaurs as i can only recognise them and state their traits.

I think I will discuss Dilophosaurus evolution next.

ok......*is sad and depressed*.......

alright I will also talk about Pterosauromorph evolution as well

I'm going to make a separate post for Pterosaurs and Marine Reptiles

cool!

Nice!  I love the Spinosaurids.

Spinosaurus, the internet's most overrated dinosaur