View Details:  Prev Record    Next Record
Clade
Subclade

Taxon
Taxon
Ankylosaurinae
Nominal Author
Brown 1908
2nd Nominal Author
Nopcsa 1918
Taxon Status ACTIVE
Comments
Ankylosaurinae was initially defined by Sereno (1998) using Ankylosaurus as an internal specifier and the basal ankylosaurids Minmi and Shamosaurus as external specifiers. Recently, Vickaryous et al. (2004) adopted this definition but dropped Minmi as one of the external specifiers. Their phylogenetic work suggested that Shamosaurus was the more derived of the two, although the characters supporting this arrangement are not extensive. An even more basal ankylosaurid from the Upper Jurassic was described recently, Gargoyleosaurus parkpinorum (Carpenter et al. 1998), and there seems little reason not to include all three as external specifiers in the interest of long-term stability of the taxonomic content of Ankylosaurinae. This parallels the definition of Nodosaurinae with respect to Nodosauridae. The active definition for Ankylosaurinae thus is a first-order revision of previous definitions that includes three basal taxa as external specifiers.
Potential Synonomy

Active Phylogenetic Definition
Active Definition
The most inclusive clade containing Ankylosaurus magniventris Brown 1908 but not Gargoyleosaurus parkpinorum Carpenter et al. 1998, Minmi paravertebra Molnar 1980, Shamosaurus scutatus Tumanova 1983.
Shorthand
> Ankylosaurus magniventris but not Gargoyleosaurus parkpinorum, Minmi paravertebra, Shamosaurus scutatus.
Definitional Author
Sereno 2005
Definition Status checked
Definition Type STEM
Node-Stem Triplet NO
Other Triplet Taxa
Specifiers
Specifier(s) A
Ankylosaurus magniventris
Specifier(s) B
Specifier(s) C
Shamosaurus scutatus, Minmi paravertebra
Qualifiers
+Taxon
-Taxon
Datum
Taxonomic Content
Publication Year Unknown
Unknown
Unknown
1998

Inactive Taxon Status
Rejection Criteria
Critique
 

Definitional History #1
Earliest Record
All ankylosaurids closer to Ankylosaurus than to either Shamosaurus or Minmi.
Latest Record
Sereno 1998:61
Range (My)
Range (My)
Ankylosaurus, Shamosaurus, Minmi
Range (My)

Definitional History #2
Earliest Record
All ankylosaurs closer to Ankylosaurus than to Shamosaurus.
Latest Record
Vickaryous et al. 2004:389
Range (My)
Range (My)
Ankylosaurus, Shamosaurus
Range (My)

Definitional History #3
Earliest Record
Latest Record
Range (My)
Range (My)
Range (My)

Definitional History #4
Earliest Record
Latest Record
Range (My)
Range (My)
Range (My)

Definitional History #5
Earliest Record
Latest Record
Range (My)
Range (My)
Range (My)

Definitional History #6
Earliest Record
Latest Record
Range (My)
Range (My)
Range (My)

Definitional History #7
Earliest Record
Latest Record
Range (My)
Range (My)
Range (My)

Definitional History #8
Earliest Record
Latest Record
Range (My)
Range (My)
Range (My)

Definitional History #9
Earliest Record
Latest Record
Range (My)
Range (My)
Range (My)

Definitional History #10
Earliest Record
Latest Record
Range (My)
Range (My)
Range (My)