Dinosaurs - Iguanodon

 

Dinosaurs are a diverse group of reptiles that lived from the late Triassic to the end of the Cretaceous Period (220 to 65.5 million years ago). Apart from the avian dinosaurs, they died out during the Cretaceous-Palaeogene extinction event. The avian dinosaurs evolved to become our modern birds, which in modern classification schemes are still considered to be a type of dinosaur.


The example here is Iguanodon, an 18 metre long herbivorous dinosaur that was one of the first dinosaurs ever to be described in the scientific literature. Because at that time only incomplete skeletons had been discovered early reconstructions showed Iguanodon with a horn on its nose. Later discoveries confirmed the horn was actually a modified thumb!


Credits: Sedgwick Museum, Cambridge (well worth a visit)

and Geo-Ed (a company specializing in fossil replicas).

View thin section

Iguanodon bone
plane polarised lighthttp://www.open.ac.uk/earth-research/tindle/AGT/mosaics/zgoogle_iguanodon_ppl/index.html

Object movie

Specimen
rotationRMS-Object-Dinosaur1.html

Serrated Iguanodon tooth from the Sedgwick Museum collection.

Width 1.5 cm across.

Above: Bronze sculpture of Iguanodon

Below: Reconstruction of Iguanodon with modified thumbs.

Both are on display in the Sedgwick Museum.

More Dinosaurs

Click hereRMS-Info-Dinosaur2.html

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SEM view

IguanodonRMS-SEM1-Dinosaur1.html
http://www.virtualmicroscope.co.uk/home

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