This phylogeny is the author's opinion based on his interpretation of the literature. It is however, broadly congruent with recent works (e.g. Wilson, 2002; Upchurch et al., 2004; Upchurch et al., 2007; Yates, 2007; Carbillado et al., 2011; Whitlock, 2011).
Format
Alpha
|--Beta
`--Gamma
|--Delta
|*-Epsilon
`--Zeta
|?-Eta
`--Theta
Based roughly on Mike Keesey's old Dinosauricon site. Beta and Gamma are sister taxa within the clade Alpha Delta is within Gamma, but not a member of Zeta. Epsilon, however, is Gamma incertae sedis. Eta is only tentatively placed within Zeta. Nomina nuda are non-italicized and placed in quotation marks, while unpublished taxa (as recognized by the ICZN) are designated the same way, but followed by an asterisk. Nomina dubia are not distinguished from valid taxa, as which taxa are indeterminate is a subjective question. Taxa in parentheses are technically valid according to the ICZN but not used by most theropod workers.
Cladogram
Sauropodomorpha |*-Aetonyx palustris
|*-Agrosaurus macgillivrayi
|*-Aristosaurus erectus |*-Asylosaurus yalensis
|*-Dimodosaurus poligniensis
|*-Dromicosaurus gracilis |*-Euskelosaurus? africanus |*-Fulengia youngi
|*-Gigantoscelis molengraaffi
|*-Gresslyosaurus? plieningeri
|*-Gresslyosaurus? robustus
|*-Gryponyx? taylori
|*-Gryponyx? transvaalensis
|*-Gyposaurus capensis
|*-Hortalotarsus skirtopodus
|*-Leptospondylus capensis
|*-Orosaurus capensis
|*-Pachysauriscus ajax
|*-Pachysauriscus? giganteus
|*-Pachysauriscus? magnus
|*-Pachysauriscus? wetzelianus
|*-Pachyspondylus orpenii
|*-Plateosaurus? erlenbergiensis
|*-Plateosaurus? reiningeri
|*-Plateosaurus? quenstedti
|*-"Teratosaurus" trossingensis
|*-Thecodontosaurus? hermannianus |?-Agnosphitys cromhallensis |?-Guaibasauridae | `--Guaibasaurus candelariensis
|--Panphagia protos
|--Saturnaliinae
| |--Chromogisaurus novasi
| `--Saturnalia tupiniquim
`--+--Thecodontosauridae
| |--Thecodontosaurus antiquus
| `?-Pantydraco caducus
`--+?-Lamplughsaura dharmaramensis
|?-Pradhania gracilis
`--+--Efraasia minor `--+--Ignavusaurus rachelis
`--+--Sarahsaurus aurifontanalis
`--+--Plateosauravus cullingworthi
|--Ruehleia bedheimensis |--Riojasauridae
| |--Riojasaurus incertus
| `--Eucnemesaurus fortis
`--Plateosauria
|*-Euskelosaurus browni |--Unaysaurus tolentinoi
|--Prosauropoda
| Plateosauridae
| |--Sellosaurus gracilis
| `--+--Gresslyosaurus ingens
| `--Plateosaurus engelhardti `--Massopoda
`--Sauropodiformes |--Gryponyx africanus |*-"Gyposaurus" sinensis
|--Massospondylidae
| |--+--+--Massospondylus carinatus
| | | `--Massospondylus kaalae
| | `--+--Adeopapposaurus mognai
| | `--Seitaad ruessi
| `?-+--+--Coloradisaurus brevis
| | `?-+--Mussaurus patagonicus
| | `--Xixiposaurus suni
| `--+--Lufengosaurus huenei | |?-Lufengosaurus? "changduensis" | |?-Lufengosaurus? magnus
| `--Glacialisaurus hammeri
`-----+--Chuxiongosaurus lufengensis |--Jingshanosaurus xinwaensis
|--Yunnanosaurus huangi |?-Yunnanosaurus? robustus
`--Anchisauria
|--Anchisauridae
| `--Anchisaurus polyzelus
`--+--Aardonyx celestae `--+--Leonerasaurus taquetrensis
`--+*-Blikanasaurus cromptoni
|*-Camelotia borealis |--Melanorosauridae
| `--Melanorosaurus readi
`--Sauropoda |*-"Damalosaurus laticostalis"
|--+--Antetonitrus ingenipes
| `--Lessemsaurus sauropoides `--+--Chinshakiangosaurus chunghoensis
`--+*-Amygdalodon patagonicus |*-Archaeodontosaurus descouensi |*-Cardiodon rugulosus |*-Isanosaurus attavipachi |*-"Rutellum impicatum" |--Gongxianosaurus shibeiensis |?-Kunmingosaurus wudingensis
`--Gravisauria |*-Rhoetosaurus brownei |*-Tienshanosaurus chitaiensis |*-+--Zizhongosaurus chuanchengensis | `?-Zizhongosaurus? "huangshibanensis" |--Kotasaurus yamanpalliensis |--Spinophorosaurus nigerensis |--Tazoudasaurus naimi
|--Vulcanodontidae | `--Vulcanodon karibaensis |?-"Yibinosaurus zhoui"
`--Eusauropoda
|--Shunosaurus lii `--+*-Bellusaurus sui |*-Ferganasaurus verzilini |*-Klamelisaurus gobiensis |*?"Lancangosaurus cachuensis" |*-Lapparentosaurus madagascariensis |*-Liubangosaurus hei |*-Tendaguria tanzaniensis |--Barapasaurus tagorei |--Cetiosauridae | `--Cetiosaurus oxoniensis |--Cetiosaurus? mogrebiensis |--Chebsaurus algeriensis |--Patagosaurus fariasi |--Mamenchisauridae | |--Omeisaurus junghsiensis | |--Mamenchisaurus constructus | `?-Tonganosaurus hei `--+--Losillasaurus giganteus |--Turiasauria | `--Turiasaurus riodevensis
`--Neosauropoda |*?Atlantosaurus montanus |*-Bothriospondylus suffossus |*-"Ischyrosaurus" manseli |*-Ultrasaurus tabriensis |*-Xenoposeidon proneneukos |--Haplocanthosaurus priscus |--Jobaria tiguidensis
|--Diplodocoidea | |--Amazonsaurus maranhensis | `--+--Amphicoelias altus | `--Diplodocimorpha | |--Rebbachisauridae | | |--Histriasaurus boscarollii | | `--+*-Nopcsaspondylus alarconensis | | |--Rebbachisaurus garasbae | | `--+--Limaysaurinae | | | |--Limaysaurus tessonei | | | `--+--Cathartesaura anaerobica | | | `--Rayososaurus agrioensis | | `--Nigersaurinae | | |--Zapalasaurus bonapartei | | `--+--Demandasaurus darwini | | `--Nigersaurus taqueti | `--Flagellicaudata | |--Dicraeosauridae | | |--Suuwassea emilieae | | `--+--Amargasaurus cazaui | | `--+--Brachytrachelopan mesai | | `--Dicraeosaurus hansemanni | `--Diplodocidae | |--Apatosaurinae | | |--Apatosaurus louisae | | `--+--Apatosaurus ajax | | |--Apatosaurus excelsus | | `--Apatosaurus parvus | `--Diplodocinae | |--Supersaurus vivianae | `--+--Dinhierosaurus lourinhanensis | |--Tornieria africana | `--+--Barosaurus lentus | `--Diplodocus longus
`--Macronaria Camarasauromorpha |--Camarasauridae | `--Camarasaurus supremus `--+*-Australodocus bohetii |*-Brontomerus mcintoshi |*-Duriatitan humerocristatus |*-Fukuititan nipponensis |*?"Microdontosaurus dayensis" |*-Ornithopsis hulkei |--Astrodon johnsoni |--Europasaurus holgeri `--Titanosauriformes |--Brachiosauridae | |--Abydosaurus mcintoshi | |--Brachiosaurus altithorax | |?-Cedarosaurus weiskopfae | |--Giraffatitan brancai | `--Paluxysaurus jonesi |--+--Aragosaurus ischiaticus | |--Galveosaurus herreroi | |--Tehuelchesaurus benitezii | `--+--Tastavinsaurus sanzi | `--Venenosaurus dicrocei
`--Somphospondyli |*?"Megacervixosaurus tibetensis" |*?"Yunxiansaurus hubei" |--Angolatitan adamastor |--Huanghetitan liujiaxiaensis |--Phuwiangosaurus sirindhornae `--+--Euhelopodidae | `--Euhelopus zdanskyi `--+*-Malarguesaurus florenciae |--Chubutisaurus insignis |--Erketu ellisoni |--Ligabuesaurus leanzai |--Quiaowanlong kangxii |--Tangvayosaurus hoffeti |--Wintontitan wattsi `--Titanosauria |*?Argyrosaurus superbus |--Argentinosaurus huinculensis |--Andesauroidea | `--Andesaurus delgadoi `--Titanosauroidea |*-Antarctosaurus wichmannianus |--Sonidosaurus saihangaobiensis |*-+--Bonitasaura salgadoi | `--Lognkosauria | |--Futalognkosaurus dukei | `--Mendozasaurus neguyelap `--Lithostrotia |*-Agustinia ligabuei |*?"Sauropodus" |--Malawisaurus dixeyi `--+*-Aegyptosaurus baharijensis |*-Isisaurus colberti |*-Lirainosaurus astibiae |*-Pakisaurus balochistani |*-Paralititan stromeri |*-Titanosaurus indicus |--Epachthosaurinae | `--Epachthosaurus sciuttoi |--Narambuenatitan palomoi |--Nemegtosauridae | |--Nemegtosaurus mongoliensis | `--+--Rapetosaurus krausei | `--Tapuiasaurus macedoi `--Eutitanosauria |*-Alamosaurus sanjuanensis |*-Balochisaurus malkani |*-Diamantinasaurus matildae |--Aeolosaurini | |--+--Aeolosaurus rionegrinus | | |--Gondwanatitan faustoi | | `--Panamericansaurus schroederi | `--Rinconsauria | |--Muyelensaurus pecheni | `--Rinconsaurus caudamirus `--Saltasauridae |--Opisthocoelicaudiinae | |?-Huabeisaurus allocotus | `--Opisthocoelicaudia skarzynskii `--Saltasaurinae |--Neuquensaurus australus `--+--Rocasaurus muniozi `--Saltasaurus loricatus