Project 1135: L. A. Tsuji, C. A. Sidor, J. S. Steyer, R. M. Smith, N. J. Tabor, O. Ide. 2013. The vertebrate fauna of the Upper Permian of Niger—VII. Cranial anatomy and relationships of Bunostegos akokanensis(Pareiasauria). Journal of Vertebrate Paleontology. 33 (4):747-763.
Abstract
We describe newly recovered cranial material of Bunostegos akokanensis, a pareiasaurian reptile known from the Upper Permian Moradi Formation of northern Niger. Bunostegos is highly autapomorphic, with diagnostic cranial features including two or three hemispherical bosses located above and between the external nares; laterally projecting supraorbital ‘horn’ formed by an enlarged postfrontal; large foramen present on ventral surface of postfrontal; and hemispherical supratemporal boss located at posterolateral corner of skull roof. We addressed the phylogenetic position of Bunostegos by incorporating it into a cladistic analysis of 29 parareptilian taxa (including all 21 currently valid pareiasaurs) and 127 cranial and postcranial characters. The results of this analysis place Bunostegos as more derived than middle Permian forms such as Bradysaurus and as the sister taxon to the clade including Deltavjatia plus Velosauria. Certain characters, such as the pattern of cranial ornamentation and the size and placement of the tabulars, appear to be more similar to more derived pareiasaurs such as Elginia from Scotland and Arganaceras from Morocco, but the most parsimonious tree topology indicates that these features were evolved independently in the Nigerien form. The lack of both dicynodont herbivores and Glossopteris, combined with the presence of a giant herbivorous captorhinid, indicates a markedly different community structure in the Permian of Niger compared with those for contemporaneous southern Pangean basins (i.e., Karoo, Luangwa, Ruhuhu). The endemic tetrapod fauna of Niger supports the theory that central Pangea was biogeographically isolated from the rest of the supercontinent by desert-like conditions during Late Permian times.Read the article »
Article DOI: 10.1080/02724634.2013.739537
Project DOI: 10.7934/P1135, http://dx.doi.org/10.7934/P1135
This project contains | Matrices |
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Download Project SDD File | Total scored cells: 2219 Total media associated with cells: 0 Total labels associated with cell media: 0 |
Characters | |
Total characters: 127 Total characters with associated media: 0 Total characters with media with labels: 0 Total character states: 287 Total character states with associated media: 0 Total character states with media with labels:0 Total unordered/ordered characters:127/0 |
Currently Viewing:
MorphoBank Project 1135
MorphoBank Project 1135
- Creation Date:
05 February 2014 - Publication Date:
23 May 2014 - Project views: 35321
- Media downloads: 1
- Matrix downloads: 7
This research
supported by
Authors' Institutions
- Iziko South African Museum, Cape Town
- Muséum national d'Histoire naturelle, Paris (Natural History Museum, Paris)
- University of Washington
- Southern Methodist University
- Université Abdou Moumouni (formerly University of Niamey)
Members
member name | taxa | specimens | media | chars | character
| cell scorings (scored, NPA, "-") | cell
| rules | ||||||
MorphoBank Curator Project Administrator | 29 | 1 | 1 | 127 | 0 | 0 | 2219 (2219, 0, 0) | 0 | 0 | 0 | ||||
Maureen Admin Full membership | 0 | 0 | 0 | 0 | 0 | 0 | 0 (0, 0, 0) | 0 | 0 | 0 | ||||
Linda Tsuji Full membership | 0 | 0 | 0 | 0 | 0 | 0 | 0 (0, 0, 0) | 0 | 0 | 0 |
Taxonomic Overview for Matrix 'M2496' (29 Taxa)
taxon | unscored cells |
scored cells |
no cell support |
NPA cells |
"-" cells | cell images | labels on cell images |
member access |
[1] † Millerettidae Last Modified in 05/23/14 | 15 | 116 | 112 | 0 | 0 | 0 | 0 | 3 |
[2] † Owenetta Last Modified in 05/23/14 | 24 | 103 | 103 | 0 | 0 | 0 | 0 | 3 |
[3] † Bashkyroleter bashkyricus Last Modified in 05/23/14 | 77 | 50 | 50 | 0 | 0 | 0 | 0 | 3 |
[4] † Bashkyroleter mesensis Last Modified in 05/23/14 | 73 | 55 | 54 | 0 | 0 | 0 | 0 | 3 |
[5] † Rhipaeosaurus Last Modified in 05/23/14 | 85 | 42 | 42 | 0 | 0 | 0 | 0 | 3 |
[6] † Nycteroleter Last Modified in 05/23/14 | 67 | 60 | 60 | 0 | 0 | 0 | 0 | 3 |
[7] † Emeroleter Last Modified in 05/23/14 | 47 | 80 | 80 | 0 | 0 | 0 | 0 | 3 |
[8] † Macroleter poezicus Last Modified in 05/23/14 | 26 | 101 | 101 | 0 | 0 | 0 | 0 | 3 |
[9] † Bradysaurus baini Last Modified in 05/23/14 | 9 | 118 | 118 | 0 | 0 | 0 | 0 | 3 |
[10] † Bradysaurus seeleyi Last Modified in 05/23/14 | 3 | 124 | 124 | 0 | 0 | 0 | 0 | 3 |
[11] † Nochelesaurus Last Modified in 05/23/14 | 37 | 90 | 90 | 0 | 0 | 0 | 0 | 3 |
[12] † Embrithosaurus Last Modified in 05/23/14 | 5 | 122 | 122 | 0 | 0 | 0 | 0 | 3 |
[13] † Deltavjatia Last Modified in 05/23/14 | 10 | 117 | 117 | 0 | 0 | 0 | 0 | 3 |
[14] † Shansisaurus Last Modified in 05/23/14 | 109 | 18 | 18 | 0 | 0 | 0 | 0 | 3 |
[15] † Shihtienfenia Last Modified in 05/23/14 | 105 | 22 | 22 | 0 | 0 | 0 | 0 | 3 |
[16] † Pareiasuchus peringueyi Last Modified in 05/23/14 | 11 | 116 | 116 | 0 | 0 | 0 | 0 | 3 |
[17] † Pareiasuchus nasicornis Last Modified in 05/23/14 | 20 | 107 | 107 | 0 | 0 | 0 | 0 | 3 |
[18] † Pareiasaurus Last Modified in 05/23/14 | 19 | 108 | 108 | 0 | 0 | 0 | 0 | 3 |
[19] † Scutosaurus Last Modified in 05/23/14 | 4 | 123 | 123 | 0 | 0 | 0 | 0 | 3 |
[20] † Sanchuansaurus Last Modified in 05/23/14 | 116 | 11 | 11 | 0 | 0 | 0 | 0 | 3 |
[21] † Parasaurus Last Modified in 05/23/14 | 88 | 39 | 39 | 0 | 0 | 0 | 0 | 3 |
[22] † Elginia Last Modified in 05/23/14 | 48 | 79 | 79 | 0 | 0 | 0 | 0 | 3 |
[23] † Provelosaurus Last Modified in 05/23/14 | 60 | 67 | 67 | 0 | 0 | 0 | 0 | 3 |
[24] † Anthodon Last Modified in 05/23/14 | 23 | 104 | 104 | 0 | 0 | 0 | 0 | 3 |
[25] † Pumiliopareia Last Modified in 05/23/14 | 63 | 64 | 64 | 0 | 0 | 0 | 0 | 3 |
[26] † Nanoparia Last Modified in 05/23/14 | 72 | 55 | 55 | 0 | 0 | 0 | 0 | 3 |
[27] † Arganaceras Last Modified in 05/23/14 | 72 | 55 | 55 | 0 | 0 | 0 | 0 | 3 |
[28] † Obirkovia Last Modified in 05/23/14 | 123 | 4 | 4 | 0 | 0 | 0 | 0 | 3 |
[29] † Bunostegos Last Modified in 05/23/14 | 58 | 69 | 65 | 0 | 0 | 0 | 0 | 3 |
Project views
type | number of views | Individual items viewed (where applicable) |
Total project views | 35321 | |
Project overview | 4079 | |
Matrix views | 2979 | Matrix landing page (2676 views); Tsuji et al Matrix (303 views); |
Media views | 6769 | Media search (5919 views); M326046 (850 views); |
Taxon list | 13504 | |
Documents list | 2296 | |
Specimen list | 3291 | |
Views for media list | 1904 | |
Bibliography | 499 |
Project downloads
type | number of downloads | Individual items downloaded (where applicable) |
Total downloads from project | 298 | |
Media downloads | 1 | M326046 (1 download); |
Project downloads | 289 | |
Matrix downloads | 7 | Tsuji et al Matrix (7 downloads); |
Document downloads | 1 | Copyright Permission (1 download); |