Project 2194: G. S. Ferreira, A. D. Rincón, A. Solórzano, M. C. Langer. 2015. The last marine pelomedusoids (Testudines: Pleurodira): a new species of Bairdemys and the paleoecology of Stereogenyina. PeerJ. 3 (e1063):1-29.
Abstract
The extinct Stereogenyina turtles form a relatively diverse Podocnemididae lineage, with twelve described and phylogenetically positioned species. They are characterized by a wide geographic and temporal range, from the Eocene of Africa to the Pleistocene of Southeast Asia, and a peculiar palate morphology, with a secondary palate that is unique among side-necked turtles. Here, we describe a new Stereogenyina species, based on an almost complete skull from the middle Miocene Capadare Formation, of Venezuela. A new phylogenetic analysis supports the assignment of the new species to the genus Bairdemys. Based on geometric morphometrics analyses, we related the development of the stereogenyin secondary palate with the acquisition of a durophagous diet. Based on a review of the sedimentary environments where their fossils are found, we also propose that stereogenyins were a marine radiation of podocnemidid turtles, as corroborated by previous studies of fossil eggs and limb morphology. These two inferences allowed us to hypothesize that stereogenyins occupied an ecological niche similar to that of the extant Carettini sea turtles, and that the rise of the latter group may be related to the Stereogenyina diversity fall in the end of the Miocene.Read the article »
Article DOI: 10.7717/peerj.1063
Project DOI: 10.7934/P2194, http://dx.doi.org/10.7934/P2194
This project contains | Matrices |
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Download Project SDD File | Total scored cells: 636 Total media associated with cells: 0 Total labels associated with cell media: 0 |
Characters | |
Total characters: 58 Total characters with associated media: 0 Total characters with media with labels: 0 Total character states: 120 Total character states with associated media: 0 Total character states with media with labels:0 Total unordered/ordered characters:54/4 |
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MorphoBank Project 2194
MorphoBank Project 2194
- Creation Date:
15 June 2015 - Publication Date:
15 June 2015 - Project views: 34422
- Matrix downloads: 13
Authors' Institutions
- Universidade de Sao Paulo (USP, University of Sao Paulo)
- Instituto Venezolano de Investigaciones Científicas (IVIC)
Members
member name | taxa | specimens | media | media notes | chars | character
| cell scorings (scored, NPA, "-") | cell
| rules | ||||||||||||||
Gabriel Ferreira Project Administrator | 0 | 2 | 7 | 1 | 0 | 0 | 0 | 0 | 0 | 0 (0, 0, 0) | 0 | 0 | 0 | 0 | 0 | ||||||||
MorphoBank Curator Full membership | 17 | 0 | 0 | 0 | 58 | 0 | 0 | 0 | 0 | 636 (630, 0, 6) | 0 | 2 | 0 | 0 | 0 |
Taxonomic Overview for Matrix 'M23395' (16 Taxa)
taxon | unscored cells |
scored cells |
no cell support |
NPA cells |
"-" cells | cell images | labels on cell images |
member access |
[1] Podocnemis unifilis Last Modified in 06/23/15 | 0 | 59 | 56 | 0 | 1 | 0 | 0 | 2 |
[2] Peltocephalus dumerilianus Last Modified in 06/23/15 | 2 | 54 | 54 | 0 | 1 | 0 | 0 | 2 |
[3] Erymnochelys madagascariensis Last Modified in 06/23/15 | 1 | 55 | 55 | 0 | 1 | 0 | 0 | 2 |
[4] Mogharemys blackenhorni Last Modified in 06/23/15 | 30 | 26 | 26 | 0 | 1 | 0 | 0 | 2 |
[5] Brontochelys gaffneyi Last Modified in 06/23/15 | 34 | 23 | 23 | 0 | 0 | 0 | 0 | 2 |
[6] Lemurchelys diasphax Last Modified in 06/23/15 | 23 | 34 | 34 | 0 | 0 | 0 | 0 | 2 |
[7] Shweboemys pilgrimi Last Modified in 06/23/15 | 31 | 26 | 26 | 0 | 0 | 0 | 0 | 2 |
[8] Stereogenys cromeri Last Modified in 06/23/15 | 16 | 41 | 41 | 0 | 0 | 0 | 0 | 2 |
[9] Cordichelys antiqua Last Modified in 06/23/15 | 11 | 46 | 46 | 0 | 0 | 0 | 0 | 2 |
[10] Latentemys plowdeni Last Modified in 06/23/15 | 24 | 33 | 33 | 0 | 0 | 0 | 0 | 2 |
[11] IVIC-P-2908 Last Modified in 06/23/15 | 22 | 35 | 35 | 0 | 0 | 0 | 0 | 2 |
[12] "Bairdemys" healeyorum Last Modified in 06/23/15 | 41 | 16 | 16 | 0 | 0 | 0 | 0 | 2 |
[13] Bairdemys venezuelensis Last Modified in 06/23/15 | 2 | 53 | 53 | 0 | 2 | 0 | 0 | 2 |
[14] Bairdemys hartsteini Last Modified in 06/23/15 | 21 | 36 | 36 | 0 | 0 | 0 | 0 | 2 |
[15] Bairdemys sanchezi Last Modified in 06/23/15 | 14 | 43 | 42 | 0 | 0 | 0 | 0 | 2 |
[16] Bairdemys winklerae Last Modified in 06/23/15 | 24 | 33 | 32 | 0 | 0 | 0 | 0 | 2 |
Taxonomic Overview for Matrix 'M23396' (16 Taxa)
taxon | unscored cells |
scored cells |
no cell support |
NPA cells |
"-" cells | cell images | labels on cell images |
member access |
[1] Podocnemis unifilis Last Modified in 06/23/15 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 2 |
[2] Peltocephalus dumerilianus Last Modified in 06/23/15 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 2 |
[3] Erymnochelys madagascariensis Last Modified in 06/23/15 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 2 |
[4] Mogharemys blackenhorni Last Modified in 06/23/15 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 2 |
[5] Brontochelys gaffneyi Last Modified in 06/23/15 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 2 |
[6] Lemurchelys diasphax Last Modified in 06/23/15 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 2 |
[7] Shweboemys pilgrimi Last Modified in 06/23/15 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 2 |
[8] Stereogenys cromeri Last Modified in 06/23/15 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 2 |
[9] Cordichelys antiqua Last Modified in 06/23/15 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 2 |
[10] Latentemys plowdeni Last Modified in 06/23/15 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 2 |
[11] IVIC-P-2908 Last Modified in 06/23/15 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 2 |
[12] "Bairdemys" healeyorum Last Modified in 06/23/15 | 0 | 2 | 1 | 0 | 0 | 0 | 0 | 2 |
[13] Bairdemys venezuelensis Last Modified in 06/23/15 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 2 |
[14] Bairdemys hartsteini Last Modified in 06/23/15 | 0 | 2 | 1 | 0 | 0 | 0 | 0 | 2 |
[15] Bairdemys sanchezi Last Modified in 06/23/15 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 2 |
[16] Bairdemys winklerae Last Modified in 06/23/15 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 2 |
Project views
type | number of views | Individual items viewed (where applicable) |
Total project views | 34422 | |
Project overview | 4576 | |
Media views | 10618 | Media search (5210 views); M379902 (740 views); M379897 (738 views); M379900 (719 views); M379899 (879 views); M379901 (769 views); M379898 (741 views); M379313 (822 views); |
Documents list | 1999 | |
Bibliography | 1167 | |
Specimen list | 3538 | |
Matrix views | 2324 | Matrix landing page (2013 views); Character Matrix (146 views); Inferred Habitat (165 views); |
Taxon list | 10200 |
Project downloads
type | number of downloads | Individual items downloaded (where applicable) |
Total downloads from project | 293 | |
Document downloads | 3 | Phylogenetic data matrix (3 downloads); |
Project downloads | 277 | |
Matrix downloads | 13 | Character Matrix (8 downloads); Inferred Habitat (5 downloads); |