Re: ICZN or NOT!!!

["T. Michael Keesey" <mightyodinn@yahoo.com>]

--- Steven Mahon <floridamahon@yahoo.com> wrote:
> Hello Again,
> 
> I have another question. (Which probably has an easy
> answer). I know alot of people, in accordance to ICZN,
> use the first-named genus to name the family etc..

That is not the rule.
The rule is that the first taxon of familial rank (including superfamilies,
subfamilies, tribes, and subtribes) gets priority.

> Well, I've that some families do not follow this.
> (With the exception of Nomen Dubia).
> For example:
> 
> Stegoceras 1902 > Pachycephalosaurus 1943
> Lycorhinus 1924 > Heterodontosaurus 1962
> Hypacrosaurus 1913 > Lambeosaurus 1923
> Yangchuanosaurus 1978 > Sinraptor 1994
> 
> Those are only a handful out all the families I've
> noticed. Could anyone tell me why the second names are
> used over the first?

Neither "Stegoceratidae", "Lycorhinidae", "Yangchuanosauridae", nor any other
family-level rank based on these genera has been named, to my knowledge.

I believe Hypacrosaurinae was named, but (CMIIW) Lambeosaurinae has predence by
ICZN rules, as it was named earlier. (Even if _Hypacrosaurus_ was named before
_Lambeosaurus_.)


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=====> T. Michael Keesey <keesey@bigfoot.com>
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