1 Dinosauria The MRCA of Saurischia and Ornithischia, and its descendants
2 *** Eoraptor The most basal known dinosaur
3 Saurischia Everything closer to Megalosaurus than to Iguanodon
4 Sauropodomorpha Sauropods and their ancestors and close relatives
10 Sauropoda Huge, long-necked herbivores
12 *** Jobaria A surprisingly primitive Early Cretaceous form
14 Diplodocimorpha Diplodocus, Apatosaurus, Seismosaurus and kin
17 *** Rebbachisaurus Had a sail on its back
22 *** Sauroposeidon The tallest known dinosaur (18m)
25 *** Argentinosaurus The heaviest known dinosaur (100 tonnes)
26 Theropoda Bipedal carnivores
28 Ceratosauria May be polyphyletic if neoceratosaurs are tenanuran
32 *** Dilophosaurus Had a pair of long crests on its nose
36 Spinosauria Large carnivores with sails on their backs
41 Avetheropoda aka. Neotetanurae
42 Carnosauria Previously used just to mean "large theropods"
46 Carcharodontosaurinae Some consider these animals derived abelisaurs
47 *** Giganotosaurus Probably the heaviest known theropod
48 Coelurosauria Previously used just to mean "small theropods"
50 [unnamed] Unnamed clade {Ornithomimosauria+Tyrannosauria}
54 Tyrannosauroidea Includes early form Eotyrannus
57 Tyrannosaurini Could be defined as {Tyrannosaurs+Tarbosaurus}
60 Oviraptorosauria Includes Caenagnathidae
62 *** Oviraptor Some specimens found brooding their nests
63 Therizinosauria Truly freaky long-necked, huge-clawed fatsos
70 Troodontidae Highest encephalisation quotient on known dinos
74 *** Velociraptor Much smaller in real life than in Jurassic Park
76 Aves Birds, including modern birds
78 Alvarezsauria Short, stong args; long, gracile legs. Weird
80 Mononykinae Hands had only a single, spike-like finger
82 Ornithischia Everything closer to Iguanodon than to Megalosaurus
84 Thyreophora The armoured dinosaurs, ankylosaurs and stegosaurs
87 Stegosauria Single or double row of plates down the back
89 *** Kentrosaurus Had spikes on its back instead of plates
90 Ankylosauria Heavily armoured, above and below
92 Cerapoda Defined as {Triceratops+Iguanodon}
93 Marginocephalia Defined as {Triceratops+Pachycephalosaurus}
95 Neoceratopsia Everything closer to Triceratops than to Psittacosaurus
100 Ceratopsidae {Chasmosaurinae+Centrosaurinae}
102 Pachycephalosauria Thick-headed, wide-bodied herbivorous bipeds
104 Ornithopoda The least interesting of all the dinosaur groups
105 *** Qantassaurus A profoundly dull basal ornithopod
112 *** Lurdosaurus Looks a lot like a fat Iguanodon
116 Euhadrosauria Lambeosaurs (crested) + Hadrosaurs (not)
117 Lambeosaurinae The least dull of all the ornithopods