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Jaime Headden wrote:
< ... Most abelisaurs are classic
Gondwanans, and it is
Laurasian abelisaurs like *Tarascosaurus* that make the group unusual.> Mickey Mortimer wrote:
<Quite a few dinosaurs have been found recently in various
Gondwanan continents that were not supposed to exist there previously.
These include ornithomimids and dromaeosaurids in Australia and nodosaurs,
stegosaurs and troodontids in South America. Of course, as Majungatholus
shows us, more complete finds may completely change our
theories.>
My notes:
1) European Abelisaurs were not unusual if they came from Africa.
European Late Cretaceous has many groups of Gondwanan origin
(abelisaurs, titanosaurs, odd iguanodonts/hadrosaurs,etc)
2) I've read about nodosaurs in Australia, South America, ANtarctica, New
Zealand. So there must be at least a Gondwanan nodosaurian group.
3) The bridge between South and North America in Campanian/Maastrichtian is
a explication for many groups. Titanosaurs to North; marsupials and
ungulates to South, maybe dromeosaurs, troodonts and hadrosaurs too. Did
Ceratopsian originate in Asia, and spread to North America, reaching South
America? Or they came from Gondwana and passed to North?
4) Stegosaurs were surely worldwide.
Joao SL
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