All About Dinosaurs its Friday

[Troodon]

Hands are very important to everyone including Dinosaurs .. here are some photos of your not so ordinary ones ........both herbivore and theropod.  Some pretty cool configurations..

 

Paper on the evolution of Theropod dinosaur Hands

https://onlinelibrary.wiley.com/doi/full/10.1111/joa.12719

 

The evolution of the manus of early theropod dinosaurs is characterized by high inter‐ and intraspecific variation

Daniel E. Barta, Sterling J. Nesbitt, Mark A. Norell

First published: 08 November 2017

https://doi.org/10.1111/joa.12719

 

 

Have to thank Joao Vasco Leite for a bunch of these photos and info.from Twitter

 

From the Triassic dawn of Dinosaurs here is the left hand of Herrerasaurus from Argentina

 

 

 

Also from the late Triassic a sauropodomorph Plateosaurus,  a beautiful specimen

 

 

 

 

From the Early Jurassic of Argentina the ariticulated hands of the sauropodomorph Adeopapposaurus , wow 

 

 

The Jurassic brought us Dilophosaurus and sorry Jurassic Park fans there is no conclusive scientific evidence that it could spit poison 

 

 

 

Staying in the Jurassic here is Allosaurus and the different growth stages of its hand claws

 

 

 

Also from the Morisson the tiny hand of the herbivore Camptosaurus

 

 

 

The Jurassic also brought us the exquisite left forelimb of the stegosaur Gigantspinosaurus, from the Zigong Dinosaur Museum

 

 

 

Stegosaurus hand material is quite rare, especially fairly complete ones.  Morisson Formation

 

 

One of the classics, first described by O.C. Marsh back in 1884. The left hand of Ceratosaurus. The bone to the right is metacarpal I, the first bone of the "thumb" .   Have to wonder what it was used for.

 

 

 

The Late Jurassic theropod Tanycolagreus  ..cast

 

 

 

 

From the early Cretaceous the hand of the recently described alvarezsaurid, Bannykus from China

 

 

 

Also from the Early Cretaceous of Utah the left hand of Cedrorestes an iguanodontian

 

 

 

Everyones favorite the hands of Deinonychus

 

 

 

[Troodon]

Again from the Triassic the very small hand of Coelophysis

 

 

 

From the Early Cretaceous the fantastic Left hand of Nothronykus, a therizinosaur from North America, Utah

 

 

 

Moving into the Late Cretaceous from Asia Velociraptor

 

 

 

 

Also in Asia Protoceratops skull and right hand

 

 

 

Not a great view but also from Mongolia here is the tyrannosaurid Tarbosaurus

 

 

 

The Late Cretaceous from North America saw the Hadrosaur Edmontosaurus but here is one with with pathological left metacarpals III and IV...thats got to hurt!

 

 

 

The beautiful hands of the Hadrosaur Hypacrosaurus from the Two Medicine Fm

 

 

 

The very plain hand of the Titanosaurus Alamosaurus. hands would only be composed by metacarpals, no phalanges! Kind of like a column version of knuckle walking.

 

 

 

Finally from the Late Cretaceous of Madagascar the tiny left hand and forearm of the abelisaurid Majungasaurus, 

image by Tom Raven

 

 

[Runner64]

All are very neat but to see all those Allosaurus claws laid out according to growth stage is interesting to see how it forms  thanks for sharing

[fossilsonwheels]

The Camptosaurus hands is actually kind of cute lol Great work putting this together. What a fun trip around the world of dinosaur hands ! Thank you

[Al Tahan]

Thanks for sharing!

[Troodon]

1 hour ago, fossilsonwheels said:

The Camptosaurus hands is actually kind of cute lol Great work putting this together. What a fun trip around the world of dinosaur hands ! Thank you

Thanks, Might want to consider a short slide show for your program

 

4 hours ago, Runner64 said:

All are very neat but to see all those Allosaurus claws laid out according to growth stage is interesting to see how it forms  thanks for sharing

Thats is a cool photo, one never gets to see them like that 

[ynot]

Wonderful selection and subject this week!

Thanks Frank!

[Nimravis]

Wow Frank, those are some cool pictures.