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Classification of the Dinosaurs II



[One note - all the sauropodomorph listings in the last posting should be
bumped up 1 indentation]

-Ornithischia
--Pisanosaurus
--?Lesothosaurus [may be Fabrosaurus and an ornithopod]
--Genasauria
---Thyreophora
----Scutellosaurus
----unnamed clade
------Emausaurus
------Thyreophoridea
-------Scelidosaurus
-------Euryopoda
--------Stegosauria
---------Huyangosaurus
---------unnamed clade
----------"Dacentruridae" (incl. Dacentrurus, Regnosaurus, etc.)
----------Stegosauridae (incl. Stegosaurus, Kentrosaurus, Tuojiangosaurus, etc.)
--------Ankylosauria
---------Ankylosauridae (incl. Ankylosaurus, Euoplocephalus, Saichania,
Talaurus, Pinacosaurus, etc.)
---------Nodosauridae (incl. Nodosaurus, Hylaeosaurus, Panoplosaurus,
Edmontonia, etc.)
---------"Polacanthidae" (incl. Polacanthus, Mymoorapelta, etc.)
---Cerapoda
----Ornithopoda
-----?Fabrosauridae [if Lesothosaurus is really Fabrosaurus and is really
an ornithopod]
-----Heterodontosauridae
------Euornithopoda
-------Hypsilophodontia
--------Thescelosaurus
--------Hypsilophodontidae (incl. Hypsilophodon, Parksosaurus,
Zephyrosaurus, etc.)
--------Iguanodontia
---------Tenontosaurus
---------Dryomorpha
----------Dryosauridae (incl. Dryosaurus, Valdosaurus, etc.)
----------Ankylopollexia
-----------Camptosaurus
-----------Styracosterna
------------Iguanodon
------------Ouranosaurus
------------Probactrosaurus
------------Hadrosauridae
-------------new Albian hadrosaurid from Utah
-------------unnamed group
--------------Telmatosaurus & other primitive hadrosaurs (Claosaurus,
Tanius, Secernosaurus, etc.)
--------------Euhadrosauria
---------------Hadrosaurinae
----------------"Maiasaurini" (incl. Maiasaura, Brachylophosaurus, etc.)
----------------"Hadrosaurini" ("gryposaurs") (incl. Hadrosaurus,
Gryposaurus, etc.)
----------------unnamed group
-----------------"Saurolophini" (incl. Saurolophus, Prosaurolophus, etc.)
-----------------"Edmontosaurini" (incl. Edmontosaurus, Anatotitan,
Shangtungosaurus, etc.)
----Marginocephalia
-----Stenopelix
-----Pachycephalosauria
------Homalocephalidae (incl. Homalocephale, Goyocephale) [may be paraphyletic]
------Pachycephalosauridae (incl. Pachycephalosaurus, Stegoceras,
Prenocepale, etc.)
-----Ceratopsia
------Psittacosaurus
------Neoceratopsia
-------Protoceratopsidae (incl. Protoceratops, Leptoceratops,
Udanoceratops, Bagaceratops, etc.)
-------Ceratopsidae
--------"Ceratopsinae" (Chasmosaurinae) (incl. Chasmosaurus, Pentaceratops,
Torosaurus, Triceratops, etc.)
--------Centrosaurinae (incl. Centrosaurus, Styracosaurus,
Pachyrhinosaurus, etc.)

Note: most of the above is based on the works of others.

                                
Thomas R. Holtz, Jr.                                   
tholtz@geochange.er.usgs.gov
Vertebrate Paleontologist in Exile                  Phone:      703-648-5280
U.S. Geological Survey                                FAX:      703-648-5420
Branch of Paleontology & Stratigraphy
MS 970 National Center
Reston, VA  22092
U.S.A.