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Re: Tyrannosaurus imperialis?
> This brings up another question I've been meaning to ask. _Deinodon_ was
> named half a century before _Tyrannosaurus_, and it was given its own
> family. Thus, technically shouldn't the taxa Tyrannosauroidea,
> Tyrannosauridae, etc. be called Deinodontoidea, Deinodontidae, etc.?
> _Deinodon_ may be dubious, but no one disputes that it belongs in the same
> family as _Tyrannosaurus_.
No one disputes that _Deinodon_ is a tyrannosaurid, but it's still an
invalid genus because it is based on indeterminate material. As a _nomen
dubium_, _Deinodon_ cannot be the nominative genus for any subfamily,
family, or superfamily. ICZN rules.
> There are other cases where families are named
> after invalid/dubious genera: Ceratopsidae, Caenagnathidae, etc.
You may soon be adding Hadrosauridae, Titanosauridae, and perhaps
Troodontidae to the list of families named after invalid genera
(which would therefore makes the families invalid).
_Ceratops montanus_ may prove to be a valid species if (?topotypic)
material from the vicinity of Milk River turns out to be diagnostic.
I'm not sure if this new material is topotypic - does anyone out
Caenagnathidae remains valid; the fact that _Caenagnathus_ was sunk as a
junior synonym of _Chirostenotes_ (was it by Hans-Dieter Sues?) doesn't
change a thing. _Caenagnathus_ is still in the family (as a
subjective junior synonym of _Chirostenotes), and it is not a nomen
dubium. Caenagnathidae stays.