Re: Dino Notes

[Dinogeorge@aol.com]

In a message dated 96-01-08 02:35:24 EST, steve.cole@genie.com writes:

<< While most of the Stegosaurs were mid-Jurassic (160-140mya)
a couple of them lasted later....
Wuerhosaurus 125-110mya
Craterosaurus 115-105mya
and one of them hung in there to the VERY end of all dinos....
Dravidosaurus, a pygmy species, lived on in India (then a
free-floating island with no nodo/ankylosaurs) until the rock >>

Sankar Chatterjee tells me that _Dravidosaurus_ is not stegosaur after all
but is based on fragmentary plesiosaur bones. This makes much more sense.

Also, _Regnosaurus northamptoni_ is a Wealden stegosaur (Early Cretaceous),
perhaps a senior synonym of _Craterosaurus pottonensis_. I outed it as such
in my article on stegosaur evolution for Gakken (_Dino-Frontline_ #4, 1993),
and a paper by Barrett & Upchurch (1995) confirms this. Details will be in
_Historical Dinosaurology_ #1: the Origin and Evolution of the Stegosaurs.