Project 3930: E. Cadena, A. Vanegas, C. Jaramillo, J. M. Cottle, T. A. Johnson. 2019. A new Miocene turtle from Colombia sheds light on the evolutionary history of the extant genus Mesoclemmys Gray, 1873. Journal of Vertebrate Paleontology. 39 (5):e1716777.
Abstract
Mesoclemmys is the most diverse extant genus of South American pleurodires or side-necked turtles, with at least 10 species inhabiting fluvial to littoral environments. Despite this high extant diversity and extensive geographic distribution, the evolutionary history and fossil record of this genus are completely unknown. Here, we describe the first fossil record of this genus, which supports a previous molecular-based hypothesis that indicates a minimum split time of 13.5 Ma between this and other genera of South American chelids. Mesoclemmys vanegasorum, sp. nov., is represented by a nearly complete shell (carapace and plastron) and some postcranial bones found in the middle Miocene (13.6 ± 0.2 Ma), La Victoria Formation, Tatacoa Desert, Colombia, increasing the turtle paleodiversity of La Venta Fauna. It differs from all extant species of Mesoclemmys by vertebral scute 1 reaching the sutural boundary between peripherals 1 and 2; shorter cervical and marginal scutes 1 to 3; pleurals 1 very advanced over the peripherals; pygal bone with a posteromedial shallow notch; vertebral 5 covering half of the pygal bone; small extragulars reaching only half of the epiplastra length; and a fine microvermiculation of the shell. Our phylogenetic results show a close relationship between M. vanegasorum, sp. nov., and the extant M. hogei. The overall morphology and size of Mesoclemmys genus have remained relatively constant for at least the last 13.6 million years. However, its geographic distribution has decreased drastically in northwestern South America, being restricted today to the lower region of the Magdalena River Basin.Read the article »
Article DOI: 10.1080/02724634.2019.1716777
Project DOI: 10.7934/P3930, http://dx.doi.org/10.7934/P3930
This project contains | Matrices |
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Download Project SDD File | Total scored cells: 2368 Total media associated with cells: 0 Total labels associated with cell media: 0 |
Characters | |
Total characters: 84 Total characters with associated media: 0 Total characters with media with labels: 0 Total character states: 216 Total character states with associated media: 0 Total character states with media with labels:0 Total unordered/ordered characters:66/18 |
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MorphoBank Project 3930
MorphoBank Project 3930
- Creation Date:
17 February 2021 - Publication Date:
17 February 2021 - Project views: 9493
- Matrix downloads: 4
Authors' Institutions
- Universite de Montpellier
- University of California Santa Barbara
- Smithsonian Tropical Research Institute
- Universidad del Rosario
- Fundacion Vigias Del Patrimonio Paleontologico La Tatacoa
Members
member name | taxa | specimens | media | chars | character
| cell scorings (scored, NPA, "-") | cell
| rules | ||||||
MorphoBank Curator Project Administrator | 32 | 2 | 2 | 84 | 0 | 0 | 2368 (2207, 0, 161) | 0 | 0 | 0 | ||||
Edwin-Alberto Cadena Full membership | 0 | 0 | 0 | 0 | 0 | 0 | 0 (0, 0, 0) | 0 | 0 | 0 |
Taxonomic Overview for Matrix 'M27234' (32 Taxa)
taxon | unscored cells |
scored cells |
no cell support |
NPA cells |
"-" cells | cell images | labels on cell images |
member access |
[1] Chelydra serpentina Last Modified in 02/17/21 | 0 | 74 | 74 | 0 | 10 | 0 | 0 | 2 |
[2] † Notoemys laticentralis Last Modified in 02/17/21 | 27 | 53 | 53 | 0 | 4 | 0 | 0 | 2 |
[3] † Platychelys obendorferi Last Modified in 02/17/21 | 37 | 44 | 44 | 0 | 3 | 0 | 0 | 2 |
[4] † Araripemys barretoi Last Modified in 02/17/21 | 3 | 75 | 75 | 0 | 6 | 0 | 0 | 2 |
[5] Podocnemis sextuberculata Last Modified in 02/17/21 | 0 | 78 | 78 | 0 | 6 | 0 | 0 | 2 |
[6] Podocnemis expansa Last Modified in 02/17/21 | 0 | 78 | 78 | 0 | 6 | 0 | 0 | 2 |
[7] Elseya dentata Last Modified in 02/17/21 | 0 | 78 | 77 | 0 | 7 | 0 | 0 | 2 |
[8] Emydura macquarii Last Modified in 02/17/21 | 0 | 79 | 79 | 0 | 5 | 0 | 0 | 2 |
[9] Rheodytes leukops Last Modified in 02/17/21 | 0 | 78 | 78 | 0 | 6 | 0 | 0 | 2 |
[10] Myuchelys latisternum Last Modified in 02/17/21 | 0 | 76 | 76 | 0 | 8 | 0 | 0 | 2 |
[11] Pseudemydura umbrina Last Modified in 02/17/21 | 0 | 80 | 79 | 0 | 5 | 0 | 0 | 2 |
[12] Chelodina colliei Last Modified in 02/17/21 | 0 | 77 | 77 | 0 | 7 | 0 | 0 | 2 |
[13] Chelodina expansa Last Modified in 02/17/21 | 0 | 77 | 77 | 0 | 7 | 0 | 0 | 2 |
[14] Platemys platycephala Last Modified in 02/17/21 | 0 | 78 | 78 | 0 | 6 | 0 | 0 | 2 |
[15] Acanthochelys macrocephala Last Modified in 02/17/21 | 0 | 78 | 78 | 0 | 6 | 0 | 0 | 2 |
[16] Acanthochelys radiolata Last Modified in 02/17/21 | 0 | 78 | 78 | 0 | 6 | 0 | 0 | 2 |
[17] Mesoclemmys nasuta Last Modified in 02/17/21 | 0 | 79 | 79 | 0 | 5 | 0 | 0 | 2 |
[18] Mesoclemmys gibba Last Modified in 02/17/21 | 0 | 80 | 80 | 0 | 4 | 0 | 0 | 2 |
[19] Phrynops hilari Last Modified in 02/17/21 | 0 | 80 | 80 | 0 | 4 | 0 | 0 | 2 |
[20] Phrynops geoffroanus Last Modified in 02/17/21 | 0 | 80 | 80 | 0 | 4 | 0 | 0 | 2 |
[21] Chelus fimbriatus Last Modified in 02/17/21 | 0 | 80 | 79 | 0 | 5 | 0 | 0 | 2 |
[22] Hydromedusa maximiliani Last Modified in 02/17/21 | 0 | 80 | 80 | 0 | 4 | 0 | 0 | 2 |
[23] Hydromedusa tectifera Last Modified in 02/17/21 | 0 | 79 | 79 | 0 | 5 | 0 | 0 | 2 |
[24] † Hydromedusa casamayorensis Last Modified in 02/17/21 | 34 | 46 | 46 | 0 | 4 | 0 | 0 | 2 |
[25] † Yaminuechelys gasparinii Last Modified in 02/17/21 | 19 | 65 | 64 | 0 | 1 | 0 | 0 | 2 |
[26] † Yaminuechelys maior Last Modified in 02/17/21 | 18 | 65 | 64 | 0 | 2 | 0 | 0 | 2 |
[27] † Yaminuechelys sulcipeculiaris Last Modified in 02/17/21 | 64 | 18 | 18 | 0 | 2 | 0 | 0 | 2 |
[28] Mesoclemmys dahli Last Modified in 02/17/21 | 0 | 79 | 79 | 0 | 5 | 0 | 0 | 2 |
[29] Mesoclemmys raniceps Last Modified in 02/17/21 | 0 | 79 | 79 | 0 | 5 | 0 | 0 | 2 |
[30] Mesoclemmys vanderhaegei Last Modified in 02/17/21 | 45 | 35 | 35 | 0 | 4 | 0 | 0 | 2 |
[31] † Mesoclemmys vanegasorum Last Modified in 02/17/21 | 38 | 41 | 41 | 0 | 5 | 0 | 0 | 2 |
[32] Mesoclemmys hogei Last Modified in 02/17/21 | 40 | 40 | 40 | 0 | 4 | 0 | 0 | 2 |
Project views
type | number of views | Individual items viewed (where applicable) |
Total project views | 9493 | |
Project overview | 846 | |
Matrix views | 579 | Data matrix (79 views); Matrix landing page (500 views); |
Media views | 2245 | Media search (1655 views); M739115 (287 views); M739116 (303 views); |
Specimen list | 1480 | |
Taxon list | 3261 | |
Views for media list | 612 | |
Bibliography | 464 | |
Documents list | 6 |
Project downloads
type | number of downloads | Individual items downloaded (where applicable) |
Total downloads from project | 85 | |
Project downloads | 81 | |
Matrix downloads | 4 | Data matrix (4 downloads); |