Project 5105: R. R. Scoch. 2008. The Capitosauria (Amphibia): characters, phylogeny, and stratigraphy. Palaeodiversity. 1:189-226.
Abstract
The phylogeny of the largest amphibians, the Triassic capitosaurs, is still much debated. One key taxon for the understanding of their relationships, Odenwaldia heidelbergensis from the Buntsandstein of Waldkatzenbach, is restudied here. A phylogenetic analysis performed on the basis of 66 characters and 25 taxa gives a new hypothesis of relationships. It rests to a large degree on previous data matrices, but many character codings have been changed with respect to new observations as well as the discovery of new taxa. The present data indicate that all classic capitosaur taxa do form a clade.The Capitosauria (all taxa more closely related to Parotosuchus than to Trematosaurus) excludes Benthosuchus and Edingerella but includes Wetlugasaurus, Sclerothorax, Watsonisuchus, Parotosuchus, and all other capitosaurs. All capitosaurs above Watsonisuchus are referred to as the Capitosauroidea, which includes Parotosuchus, Cherninia + Odenwaldia, Eryosuchus, Xenotosuchus, and a vast capitosaur crown clade. The crown includes two main branches: (1) the “Eucyclotosauria” (Cyclotosaurus, Kupferzellia, Procyclotosaurus, Stanocephalosaurus pronus) and (2) the “Paracyclotosauria” (Stanocephalosaurus birdi, Paracyclotosaurus, Mastodonsaurus, and the heylerosaurids Eocyclotosaurus and Quasicyclotosaurus). Stratigraphically, capitosaur phylogeny still reveals a rather poor match. However, the present phylogenetic hypothesis matches the stratigraphic ranges more precisely than the previous ones. The early branching between the “Eucyclotosauria” and “Paracyclotosauria” is more consistent with the fossil record than an alternative concept, in which Cyclotosaurus and the heylerosaurids form sister taxa (“Pancyclotosauria”). In any case, the otic fenestra and
several other probably correlated features in the palate must have evolved two times independently within the crown
capitosauroids
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Project DOI: 10.7934/P5105, http://dx.doi.org/10.7934/P5105
This project contains | Matrices |
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Download Project SDD File | Total scored cells: 1647 Total media associated with cells: 0 Total labels associated with cell media: 0 |
Characters | |
Total characters: 66 Total characters with associated media: 0 Total characters with media with labels: 0 Total character states: 144 Total character states with associated media: 0 Total character states with media with labels:0 Total unordered/ordered characters:66/0 |
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MorphoBank Project 5105
MorphoBank Project 5105
- Creation Date:
23 February 2024 - Publication Date:
13 March 2024 - Project views: 855
Authors' Institutions
- State Museum of Natural History Stuttgart
Members
member name | taxa | specimens | media | chars | character
| cell scorings (scored, NPA, "-") | cell
| rules | ||||||
Shreya Jariwala Project Administrator | 27 | 1 | 1 | 66 | 0 | 0 | 1647 (1647, 0, 0) | 0 | 0 | 0 |
Taxonomic Overview for Matrix 'M29685' (27 Taxa)
taxon | unscored cells |
scored cells |
no cell support |
NPA cells |
"-" cells | cell images | labels on cell images |
member access |
[1] † Rhinesuchidae Last Modified in 02/23/24 | 0 | 67 | 66 | 0 | 0 | 0 | 0 | 1 |
[2] † Benthosuchus Last Modified in 02/23/24 | 0 | 67 | 66 | 0 | 0 | 0 | 0 | 1 |
[3] † Edingerella Last Modified in 02/23/24 | 2 | 65 | 64 | 0 | 0 | 0 | 0 | 1 |
[4] † Thoosuchus Last Modified in 02/23/24 | 0 | 66 | 66 | 0 | 0 | 0 | 0 | 1 |
[5] † Lydekkerina Last Modified in 02/23/24 | 0 | 66 | 66 | 0 | 0 | 0 | 0 | 1 |
[6] † Cherninia Last Modified in 02/23/24 | 8 | 58 | 58 | 0 | 0 | 0 | 0 | 1 |
[7] † Cyclotosaurus Last Modified in 02/23/24 | 3 | 65 | 63 | 0 | 0 | 0 | 0 | 1 |
[8] † Eocyclotosaurus Last Modified in 02/23/24 | 4 | 62 | 62 | 0 | 0 | 0 | 0 | 1 |
[9] † Eryosuchus Last Modified in 02/23/24 | 0 | 68 | 66 | 0 | 0 | 0 | 0 | 1 |
[10] † Kupferzellia Last Modified in 02/23/24 | 1 | 65 | 65 | 0 | 0 | 0 | 0 | 1 |
[11] † Mastodonsaurus cappelensis Last Modified in 02/23/24 | 0 | 66 | 66 | 0 | 0 | 0 | 0 | 1 |
[12] † Mastodonsaurus giganteus Last Modified in 02/23/24 | 0 | 66 | 66 | 0 | 0 | 0 | 0 | 1 |
[13] † Odenwaldia Last Modified in 02/23/24 | 32 | 34 | 34 | 0 | 0 | 0 | 0 | 1 |
[14] † Parotosuchus haughtoni Last Modified in 02/23/24 | 3 | 63 | 63 | 0 | 0 | 0 | 0 | 1 |
[15] † Parotosuchus nasutus Last Modified in 02/23/24 | 1 | 65 | 65 | 0 | 0 | 0 | 0 | 1 |
[16] † Parotosuchus orenburgensis Last Modified in 02/23/24 | 0 | 66 | 66 | 0 | 0 | 0 | 0 | 1 |
[17] † Paracyclotosaurus crookshanki Last Modified in 02/23/24 | 4 | 62 | 62 | 0 | 0 | 0 | 0 | 1 |
[18] † Procyclotosaurus Last Modified in 02/23/24 | 11 | 56 | 55 | 0 | 0 | 0 | 0 | 1 |
[19] † Quasicyclotosaurus Last Modified in 02/23/24 | 4 | 62 | 62 | 0 | 0 | 0 | 0 | 1 |
[20] † Sclerothorax Last Modified in 02/23/24 | 13 | 53 | 53 | 0 | 0 | 0 | 0 | 1 |
[21] † Stanocephalosaurus birdi Last Modified in 02/23/24 | 0 | 66 | 66 | 0 | 0 | 0 | 0 | 1 |
[22] † Stanocephalosaurus pronus Last Modified in 02/23/24 | 3 | 63 | 63 | 0 | 0 | 0 | 0 | 1 |
[23] † Watsonisuchus Last Modified in 02/23/24 | 1 | 65 | 65 | 0 | 0 | 0 | 0 | 1 |
[24] † Wetlugasaurus Last Modified in 02/23/24 | 0 | 67 | 66 | 0 | 0 | 0 | 0 | 1 |
[25] † Xenotosuchus Last Modified in 02/23/24 | 3 | 63 | 63 | 0 | 0 | 0 | 0 | 1 |
[26] † Yuanansuchus Last Modified in 02/23/24 | 11 | 55 | 55 | 0 | 0 | 0 | 0 | 1 |
[27] † Stenotosaurus Last Modified in 02/23/24 | 40 | 26 | 26 | 0 | 0 | 0 | 0 | 1 |
Project views
type | number of views | Individual items viewed (where applicable) |
Total project views | 855 | |
Matrix views | 55 | Matrix landing page (55 views); |
Bibliography | 36 | |
Project overview | 66 | |
Taxon list | 383 | |
Media views | 177 | Media search (154 views); M902195 (23 views); |
Views for media list | 56 | |
Specimen list | 82 |