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Lots'a questions after a ref.-tiding-up!
I've just search through all my Dinosaur refs, and other info, and found out a
questions and comments:
As far as I know, not much of the back of Carcharodontosaurus is ever found, so
Sinraptorines, like Sinraptor and Mamenchisaurus has quite tall neural
compared to other Allosauroides. Sinraptorinae may then be a group of
taller backs,- maybe a evolutionary base for a back-sail. Acrocanthosaurus has
a lot of
features whith Acrocanthosaurus and Giganotosaurus, which again has a lot of
similarities whith Yangchuanosaurus changyouensis (mostly skull). Therefore
I've built a
cladogram like this one:
|-Sinraptor (whith base for a back-sail)
|-Yangchuanosaurus (Whith base for a back-sail, or a very low sail)
|-Carcharodontosaurus (?Tall back-sail)
|-Acrocanthosaurus (Tall back-sail)
|-Giganotosaurus (?Tall back-sail)
Other species that may belong to these groups are Szechuanosaurus,
2) Look up D. Normans "The Illustrated Dinosaur Encyclopedia", at pp. 78. What
happened to that Massospondylus' skull? IS is Massospondylus at all?
3) What is known about the cladistic position of Nyasasaurus?
4) What are the similarities/differences between Gasosaurus/Kaijiangosaurus?
Hope some of you can answer any of theses questions, or comment number 1.
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