Clade | |
Subclade |
Taxon | |
Taxon |
Abelisauridae
|
Nominal Author | Bonaparte and Novas 1985 |
2nd Nominal Author | |
Taxon Status | ACTIVE |
Comments | Abelisauridae was first defined by Novas (1997) and Sereno (1998) as a node-based taxon. Wilson et al. (2003) presented a second-order revision of Abelisauridae as a stem-based taxon in opposition to the stem-based taxon Noasauridae, which came to be recognized as its sister taxon. The advantage of a stem-based definition of Abeliauridae is that it forms a stable node-stem triplet, identifying a major dichotomy in the history of the Abelisauroidea. As a node-based taxon, in contrast, Abelisauridae would have excluded the recently described basal member Rugops (Sereno et al. 2004). Taxonomists appear to have followed this arrangement, regarding Rugops as an abelisaurid. The active definition, thus, is a first-order revision of that stem-based definition, which uses species. The revised definition also cites for exclusion two additional species (Coelophysis bauri, Passer domesticus) that ensure stabiliy of the taxonomic content of Abelisauridae, should abelisaurids be placed elsewhere among basal theropods. Padian (1999) and Tykoski and Rowe (2004) have followed the initial definitions of Novas (1997) and Sereno (1998). Tykoski and Rowe (2004), nonetheless, were unaware of the earlier second-order revision by Wilson et al. (2003). |
Potential Synonomy | Abelisauria |
Active Phylogenetic Definition | |
Active Definition |
The most inclusive clade containing Carnotaurus sastrei Bonaparte 1985 but not Noasaurus leali Bonaparte and Powell 1980, Coelophysis bauri (Cope 1889), Passer domesticus (Linnaeus 1758).
|
Shorthand |
> Carnotaurus sastrei but not Noasaurus leali, Coelophysis bauri, Passer domesticus. |
Definitional Author |
Sereno 2005 |
Definition Status | checked |
Definition Type | STEM |
Node-Stem Triplet | STEM |
Other Triplet Taxa |
Abelisauroidea, Noasauridae |
Specifiers | |
Specifier(s) A |
Carnotaurus sastrei |
Specifier(s) B | |
Specifier(s) C |
Noasaurus leali, Coelophysis bauri, Passer domesticus
|
Qualifiers | |
+Taxon | |
-Taxon | |
Datum | |
Taxonomic Content | |
Publication Year |
Unknown Unknown Unknown 2003 |
Inactive Taxon Status | |
Rejection Criteria | |
Critique | |
Definitional History #1 | |
Earliest Record | Previously listed taxa [Abelisaurus comahuensis, Carnotaurus sastrei, Xenotarsosaurus bonapartei, Indosaurus matleyi, Indosuchus raptorius, Majungasaurus crenatissimus] and all descendants of their common ancestor. |
Latest Record | Novas 1997:1 |
Range (My) | |
Range (My) |
Abelisaurus comahuensis, Carnotaurus sastrei, Xenotarsosaurus bonapartei, Indosaurus matleyi, Indosuchus raptorius, Majungasaurus crenatissimus |
Range (My) |
Definitional History #2 | |
Earliest Record | Abelisaurus, Carnotaurus, their most recent common ancestor and all descendants. |
Latest Record | Sereno 1998:64 |
Range (My) | |
Range (My) |
Abelisaurus, Carnotaurus |
Range (My) |
Definitional History #3 | |
Earliest Record | Carnotaurus, Abelisaurus, and all descendants of their most recent common ancestor. |
Latest Record | Padian et al. 1999:70 |
Range (My) | |
Range (My) |
Carnotaurus, Abelisaurus |
Range (My) |
Definitional History #4 | |
Earliest Record | The most inclusive clade containing Carnotaurus sastrei but not Noasaurus leali. |
Latest Record | Wilson et al. 2003:30 |
Range (My) | |
Range (My) |
Carnotaurus sastrei, Noasaurus leali |
Range (My) |
Definitional History #5 | |
Earliest Record | Abelisaurus comahuensis and Carnotaurus sastrei and all descendants of their most recent common ancestor. |
Latest Record | Tykoski and Rowe 2004:64 |
Range (My) | |
Range (My) |
Abelisaurus comahuensis, Carnotaurus sastrei |
Range (My) |
Definitional History #6 | |
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Latest Record | |
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Definitional History #7 | |
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Latest Record | |
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Definitional History #8 | |
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Latest Record | |
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Definitional History #9 | |
Earliest Record | |
Latest Record | |
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Definitional History #10 | |
Earliest Record | |
Latest Record | |
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