Sauropodomorpha character questions

[Steven Mahon <floridamahon@yahoo.com>]

Hello All,

I've been doing some research about characters of
sauropodomorph clades & found these characters listed
below, among others. Are these accurate characters? or
not? The clade the charcter is suppose to be for is in
the parentheses.

1.(Macronaria) arched internarial bar formed by a
narrow premaxilla.
2.(Sauropodomorpha) skull less than half the length of
femur.
3.(Sauropodomorpha) teeth w/ spatulate or lanceolate
crowns.
4.(Sauropodomorpha) anterior end of premaxilla &
dentary deflected down.
5.(Prosauropoda) marked ascending process of maxilla.
6.(Prosauropoda) twisted pollex w/ a large, inwardly
pointing claw.
7.(Sauropoda) limbs solidly ossified.
8.(Neosauropoda) elevation of the metacarpus from a
plantigrade to digitigrade posture.
9.(Sauropodomorpha) 10+ cervical vertebrae.
10.(Sauropodomorpha) mid & posterior cervical
vertebrae longer than dorsals.
11.(Sauropodomorpha) 3+ sacral vertebrae.
12.(Sauropoda) dorsal vertebrae converted to
cervicals.
13.(Eusauropoda) collapse of the pes into a
graviportal stance from a digitigrade stance.
14.(Sauropodomorpha) humerus w/ deltopectoral crest
extending 50+% of bone length.
15.(Sauropodomorpha) tibia greater than femur.
16.(Sauropodomorpha) ascending process of astragulus
fits into slot formed by descending process of tibia.
17.(Sauropodomorpha) distal tarsals absent.
18.(Prosauropoda) pes V vestigial.
19.(Prosauropoda) distal ischial process triangular.

   Thanks in Advance,
      Steven Mahon

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