Project 2579: T. P. Melo, A. G. Martinelli, M. B. Soares, K. Angielczyk. 2017. A new gomphodont cynodont (Traversodontidae) from the Middle-Late TriassicDinodontosaurusAssemblage Zone of the Santa Maria Supersequence, Brazil. Palaeontology. 60 (4):571-582.
Abstract
The tetrapod faunas from the terrestrial Middle–Late Triassic basins of Africa and South America are among the richest in the world, especially in non-mammalian cynodonts. Despite the great abundance of cynodont specimens found in these basins, there are few known taxa that exhibit interbasinal distributions. Here we describe a new species of traversodontid cynodont of the genus Scalenodon from the Triassic Dinodontosaurus Assemblage Zone of the Santa Maria Supersequence, from the state of Rio Grande do Sul, Brazil. Scalenodon ribeiroae sp. nov. is based on a partial skull that possesses a combination of features not observed in any other South American traversodontid: ellipsoid upper postcanines with the transverse crest formed by three cusps, lacking a mesiobuccal accessory cusp, and with lingual cusp projected lingually creating a concave lingual surface on the upper postcanines; the paracanine fossa is positioned medially to the upper canine, and jugal lacks a suborbital process. A phylogenetic analysis places the new taxon in a basal position within the Family Traversodontidae, with the African Scalenodon angustifrons as sister-taxon. The new specimen of Scalenodon represents the first record of this genus outside of the Manda Beds of Tanzania, and reinforces the biostratigraphical and biogeographical connection between Gondwanan Middle–Late Triassic tetrapod faunas. Although recent advances have been made, our current knowledge of these faunas is limited by the lack of absolute dates for most units and by uncertainties in the taxonomy and stratigraphical provenance of key fossils.Read the article »
Article DOI: 10.1111/pala.12302
Project DOI: 10.7934/P2579, http://dx.doi.org/10.7934/P2579
This project contains | Matrices |
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Download Project SDD File | Total scored cells: 1762 Total media associated with cells: 0 Total labels associated with cell media: 0 |
Characters | |
Total characters: 78 Total characters with associated media: 0 Total characters with media with labels: 0 Total character states: 176 Total character states with associated media: 0 Total character states with media with labels:0 Total unordered/ordered characters:78/0 |
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MorphoBank Project 2579
MorphoBank Project 2579
- Creation Date:
26 December 2016 - Publication Date:
06 June 2017 - Project views: 20562
- Matrix downloads: 32
Authors' Institutions
- Universidade Federal do Rio Grande do Sul
Members
member name | taxa | specimens | media | chars | character
| cell scorings (scored, NPA, "-") | cell
| rules | ||||||
Tomaz Panceri Melo Project Administrator | 32 | 1 | 1 | 78 | 0 | 0 | 1762 (1742, 0, 20) | 0 | 0 | 0 |
Taxonomic Overview for Matrix 'M24373' (31 Taxa)
taxon | unscored cells |
scored cells |
no cell support |
NPA cells |
"-" cells | cell images | labels on cell images |
member access |
[1] † Thrinaxodon Last Modified in 04/25/17 | 21 | 55 | 55 | 0 | 2 | 0 | 0 | 1 |
[2] † Cynognathus Last Modified in 04/25/17 | 21 | 55 | 55 | 0 | 2 | 0 | 0 | 1 |
[3] † Diademodon Last Modified in 04/25/17 | 4 | 74 | 73 | 0 | 1 | 0 | 0 | 1 |
[4] † Beishanodon Last Modified in 04/25/17 | 41 | 37 | 37 | 0 | 0 | 0 | 0 | 1 |
[5] † Cricodon Last Modified in 04/25/17 | 26 | 52 | 52 | 0 | 0 | 0 | 0 | 1 |
[6] † Langbergia Last Modified in 04/25/17 | 15 | 63 | 63 | 0 | 0 | 0 | 0 | 1 |
[7] † Sinognathus Last Modified in 04/25/17 | 24 | 54 | 54 | 0 | 0 | 0 | 0 | 1 |
[8] † Trirachodon Last Modified in 04/25/17 | 5 | 77 | 73 | 0 | 0 | 0 | 0 | 1 |
[9] JSM100 Last Modified in 12/26/16 | 36 | 42 | 42 | 0 | 0 | 0 | 0 | 1 |
[10] † Andescynodon Last Modified in 04/25/17 | 8 | 69 | 69 | 0 | 1 | 0 | 0 | 1 |
[11] † Arctotraversodon Last Modified in 04/25/17 | 46 | 32 | 32 | 0 | 0 | 0 | 0 | 1 |
[12] † Boreogomphodon jeffersoni Last Modified in 04/25/17 | 9 | 73 | 69 | 0 | 0 | 0 | 0 | 1 |
[13] † Dadadon Last Modified in 04/25/17 | 14 | 64 | 64 | 0 | 0 | 0 | 0 | 1 |
[14] † Exaeretodon argentinus Last Modified in 04/25/17 | 4 | 72 | 72 | 0 | 2 | 0 | 0 | 1 |
[15] † Exaeretodon riograndensis Last Modified in 04/25/17 | 11 | 65 | 65 | 0 | 2 | 0 | 0 | 1 |
[16] † Gomphodontosuchus Last Modified in 04/25/17 | 31 | 45 | 45 | 0 | 2 | 0 | 0 | 1 |
[17] † Luangwa drysdalli Last Modified in 04/25/17 | 8 | 71 | 70 | 0 | 0 | 0 | 0 | 1 |
[18] † Luangwa sudamericana Last Modified in 04/25/17 | 23 | 55 | 55 | 0 | 0 | 0 | 0 | 1 |
[19] † Massetognathus ochagaviae Last Modified in 04/25/17 | 15 | 64 | 63 | 0 | 0 | 0 | 0 | 1 |
[20] † Massetognathus pascuali Last Modified in 04/25/17 | 1 | 79 | 77 | 0 | 0 | 0 | 0 | 1 |
[21] † Menadon Last Modified in 04/25/17 | 9 | 65 | 65 | 0 | 4 | 0 | 0 | 1 |
[22] † Pascualgnathus Last Modified in 04/25/17 | 12 | 65 | 65 | 0 | 1 | 0 | 0 | 1 |
[23] † Protuberum Last Modified in 04/25/17 | 30 | 47 | 47 | 0 | 1 | 0 | 0 | 1 |
[24] † Santacruzodon Last Modified in 04/25/17 | 26 | 52 | 52 | 0 | 0 | 0 | 0 | 1 |
[25] † Scalenodon angustifrons Last Modified in 04/25/17 | 19 | 60 | 59 | 0 | 0 | 0 | 0 | 1 |
[26] † Mandagomphodon attridgei Last Modified in 04/25/17 | 40 | 38 | 38 | 0 | 0 | 0 | 0 | 1 |
[27] † Mandagomphodon hirschoni Last Modified in 04/25/17 | 19 | 59 | 59 | 0 | 0 | 0 | 0 | 1 |
[28] † Scalenodontoides Last Modified in 04/25/17 | 25 | 51 | 51 | 0 | 2 | 0 | 0 | 1 |
[29] † Traversodon Last Modified in 04/25/17 | 19 | 59 | 59 | 0 | 0 | 0 | 0 | 1 |
[30] † Nanogomphodon Last Modified in 04/25/17 | 67 | 11 | 11 | 0 | 0 | 0 | 0 | 1 |
[31] UFRGS-PV-0239-T Last Modified in 12/26/16 | 42 | 37 | 36 | 0 | 0 | 0 | 0 | 1 |
Project views
type | number of views | Individual items viewed (where applicable) |
Total project views | 20562 | |
Project overview | 2099 | |
Bibliography | 775 | |
Matrix views | 1502 | Traversodontid and gomphodont cynodonts (211 views); Matrix landing page (1291 views); |
Media views | 3903 | Media search (3347 views); M438343 (556 views); |
Specimen list | 2043 | |
Taxon list | 9025 | |
Views for media list | 1212 | |
Documents list | 3 |
Project downloads
type | number of downloads | Individual items downloaded (where applicable) |
Total downloads from project | 274 | |
Project downloads | 242 | |
Matrix downloads | 32 | Traversodontid and gomphodont cynodonts (32 downloads); |