Clade | |
Subclade |
Taxon | |
Taxon |
Pachycephalosaurini
|
Nominal Author | Sternberg 1945 |
2nd Nominal Author | Sullivan 2003 |
Taxon Status | ACTIVE |
Comments | Pachycephalosaurini is a family-group name first used by Sullivan (2000:198). Sullivan attempted to constuct an “apomorphy-based” definition but failed to include an internal specifier (“pachycephalosaurids with nodes in large clusters on squamosals (hypernoded forms) and nasals”). This is potentially a useful clade, including the largest species of pachycephalosurians in western North America, a group that may well become more diversified over time. A node-based definition is proposed here based on the two best known species. |
Potential Synonomy |
Active Phylogenetic Definition | |
Active Definition |
The least inclusive clade containing Pachycephalosaurus wyomingensis (Gilmore 1931) and Stygimoloch spinifer Galton and Sues 1983.
|
Shorthand |
< Pachycephalosaurus wyomingensis and Stygimoloch spinifer. |
Definitional Author |
Sereno 2005 |
Definition Status | ORIGINAL |
Definition Type | NODE |
Node-Stem Triplet | NO |
Other Triplet Taxa | |
Specifiers | |
Specifier(s) A |
Pachycephalosaurus wyomingensis |
Specifier(s) B |
Stygimoloch spinifer |
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Qualifiers | |
+Taxon | |
-Taxon | |
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Publication Year |
Unknown Unknown Unknown 2005 |
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