Thomas Richard Holtz <firstname.lastname@example.org> wrote:
> In a related point, if Pisanosaurus does prove to belong in a clade with
> Silesaurus, Asilisaurus, and co., but not dinosaurs, a strict reading of the
> rules means this family should be Pisanosauridae (which has a 30-some year
> priority over Silesauridae).
According to ICZN Article 13.1.1., for a new taxon to be valid, "it
must be accompanied by a description or definition that states in
words characters that are purported to differentiate the taxon".
(This is why Lewisuchidae can be quashed in favor of Silesauridae;
even though Lewisuchidae [as Lewisuchinae] was named 22 years before
Silesauridae, it never received a formal description or diagnosis.)
Even after reading the description of _Pisanosaurus_ (a translated
com/v2/url?u=http-3A__) I'm not paleoglot.org_files_ Casamiquela-5F67.pdf&d=DwIBaQ& c= clK7kQUTWtAVEOVIgvi0NU5BOUHhpN 0H8p7CSfnc_gI&r=Ry_ mO4IFaUmGof_ Yl9MyZgecRCKHn5g4z1CYJgFW9SI& m= LCpntSTt4htEL66zJOrqN28rCan013 zkP6PLjRCfmTk&s=yvc_ ZQIoQCudttaaNjrXR5drI- PHteKQYsR5l7K8dV4&e=
certain Pisanosauridae conforms to Article 13.1.1. _Pisanosaurus_
received a description, and Pisanosauridae is erected as part of this
description... so the unique anatomical characters that distinguished
_Pisanosaurus_ from the remaining ornithischians also distinguished
Pisanosauridae at the same time.. so I guess it's okay. As you know,
Agnolin and Rozadilla note that their referral of _Pisanosaurus_ to
Silesauridae is not particularly secure (though superior to regarding
it as a basal ornithischian), which is a good reason for retaining
Silesauridae over Pisanosauridae. (The authors also invoke ICZN
Article 220.127.116.11, but I don't think that applies, given that
Silesauridae was named less than 10 years ago).
David Marjanovic <email@example.com> wrote:
> > Tyrannosauridae should certainly have preference over Deinodontidae.
> Of course. If you'll write a petition to the Commission, I'll join it.
We shouldn't need to. ICZN Article 18.104.22.168 should mean
Tyrannosauridae can still be used in preference to Deinodontidae.
Thomas R. Holtz, Jr.
Email: firstname.lastname@example.org Phone: 301-405-4084
Principal Lecturer, Vertebrate Paleontology
Office: Geology 4106, 8000 Regents Dr., College Park MD 20742
Dept. of Geology, University of Maryland
Faculty Director, Science & Global Change Program, College Park Scholars
Office: Centreville 1216, 4243 Valley Dr., College Park MD 20742
Mailing Address: Thomas R. Holtz, Jr.
Department of Geology
Building 237, Room 1117
8000 Regents Drive
University of Maryland
College Park, MD 20742-4211 USA