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#REDIRECT ]
{{Taxobox

| color = pink
{{Redirect category shell|
| name = Ornithodirans
{{R animal with possibilities}}
| fossil_range = ] - ] (non-avian)
{{R from subtopic}}
| regnum = ]ia
{{R with history}}
| phylum = ]
| classis = ]
| subclassis = ]
| infraclassis = ]
| unranked_ordo = ]
| unranked_familia = '''Ornithodira'''
| unranked_familia_authority = ], 1986
| subdivision_ranks = Superorders
| subdivision =
*]
*]
}} }}


⚫ ]
'''Ornithodira''' is a division of the ] (and perhaps ]ia) ]. Members of this clade were characterized by an upright ] and an S-curved neck, hence the name "Ornithodira" ("bird neck"). It contains two ]s, ] and ].

Dinosauromorpha contains the ]s, and their famous descendants, the ]s, some of which are considered by most modern scientists to be ancestors of modern ]s.

Pterosauromorpha contains ]ia, which are the famous flying reptiles, and perhaps the first ]s capable of ]. Most researchers think pterosaurians had neither an S-curved neck, nor an upright ]. However, the Ornithodira clade is still valid because it is defined as the last common ancestor of the dinosaurs and the pterosaurs, and all its descendants. Exactly which ] are included in this definition is still not very clear.

==Classification==
''']'''
* '''ORNITHODIRA'''
** ?'''Pterosauromorpha'''
*** '']''
*** ?'']''
*** '''Order ]
** '''Dinosauromorpha'''
*** '']''
*** '''Dinosauriformes'''
**** '']''
**** '']''
**** '']''
**** '']''
**** '']''
**** ?'']''
**** '']''
**** '']''
**** '']''
**** '''Superorder ]'''
***** '''Order ]'''
***** '''Order ]'''
****** '''Class ]'''

⚫ ]
]
]

Latest revision as of 22:06, 19 April 2024

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