1.Albertosaurus
2.Allosaurus
3.Ankylosaurus
4.Brachiosaurus
5.Camarasaurus
6.Carnotaurus
7.Centrosaurus / Styracosaurus
8.Coelophysis
9.Deinonychus
10.Diplodocus
11.Edmontosaurus
12.Hypsilophodon
13.Iguanodon
14.Kentrosaurus
15.Lambeosaurus
16.Nothronychus / Therizinosaurus
17.Ornithomimus
18.Oviraptor / Citipati
19.Pachyrhinosaurus
20.Parasaurolophus
21.Plateosaurus
22.Polacanthus
23.Protoceratops
24.Spinosaurus / Baryonyx
25.Stegosaurus
26.Stygimoloch
27.Tenontosaurus
28.Triceratops
29.Tyrannosaurus
30.Velociraptor
31.(Amargasaurus)
32.(Argentinosaurus)
33.(Centrosaurus / Styracosaurus)
34.(Dacentrurus)
35.(Scelidosaurus)
36.(Troodon)

Research Trees:

Not in evolutionary or chronological order, but more on presumed popularity and “uniqueness” (i.e. sail-necked Amargasaurus would be more unique than drab, box-headed Camarasaurus, and thus should probably cost more).

Theropods

6 large
5 (6) small
Carnotaurus > Allosaurus > Albertosaurus > Spinosaurus > Therizinosaurus > Tyrannosaurus
Coelophysis > Ornithomimus > (Troodon) > Oviraptor > Velociraptor > Deinonychus

Sauropodomorphs

4 (6)
Plateosaurus > Camarasaurus > (Amargasaurus) > Diplodocus > Brachiosaurus > (Argentinosaurus)

Ornithopods

6
Hypsilophodon > Tenontosaurus > Iguanodon > Parasaurolophus > Edmontosaurus > Lambeosaurus

Thyreophors

4 (6)
(Scelidosaurus) > Kentrosaurus > Polacanthus > (Dacentrurus) > Stegosaurus > Ankylosaurus

Marginocephalians

5 (6)
Protoceratops > Centrosaurus > Stygimoloch > (Styracosaurus) > Pachyrhinosaurus > Triceratops