Project 4625: D. Barasoain, D. A. Croft, A. E. Zurita, V. H. Contreras, R. L. Tomassini. 2023. The last horned armadillos: phylogeny and decline of Peltephilidae (Xenarthra, Cingulata). Papers in Palaeontology. 9 (4):e1514.
Abstract
Peltephilidae (Xenarthra, Cingulata) is an ancient lineage of medium–large‐sized ‘armadillos’ from South America, characterized by chisel‐shaped molariforms, a U‐shaped dental arcade, and cephalic osteoderms modified into hornlike structures. Although the biochron of the group extends from the early Eocene to the Late Miocene, the most abundant and complete records come from the Early Miocene of Patagonia. Remains from the Late Miocene are very scarce, and the last records of the group are from the Chasicoan Stage (Tortonian). The only taxon known from this latest interval is Epipeltephilus kanti from the Arroyo Chasicó Formation (9.23 ± 0.09 Ma; Buenos Aires Province, Argentina), a species previously represented only by a few isolated osteoderms. Here we report new remains assigned to E. kanti from the Late Miocene of Loma de Las Tapias Formation (c. 9.0–7.8 Ma; San Juan Province, Argentina), including a hemimandible and several fixed and mobile osteoderms. These new specimens constitute the youngest record of Peltephilidae. The inclusion of E. kanti within Epipeltephilus and the monophyly of the genera Peltephilus and Epipeltephilus are corroborated for the first time through a cladistic analysis. The decline and eventual disappearance of this ‘armadillo’ group in the Late Miocene is chronologically coincident with the replacement of subtropical/tropical environments by more open and arid ones and with the proliferation of other large armadillos such as Vetelia, Macrochorobates and Macroeuphractus.Read the article »
Article DOI: 10.1002/spp2.1514
Project DOI: 10.7934/P4625, http://dx.doi.org/10.7934/P4625
This project contains | Matrices |
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Download Project SDD File | Total scored cells: 189 Total media associated with cells: 0 Total labels associated with cell media: 0 |
Characters | |
Total characters: 26 Total characters with associated media: 0 Total characters with media with labels: 0 Total character states: 56 Total character states with associated media: 0 Total character states with media with labels:0 Total unordered/ordered characters:0/26 |
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MorphoBank Project 4625
MorphoBank Project 4625
- Creation Date:
09 April 2023 - Publication Date:
27 June 2023 - Matrix downloads: 10
Authors' Institutions
- Case Western Reserve University
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
- Universidad Nacional de San Juan
- Universidad Nacional del Sur
- Universidad Nacional del Nordeste
Members
member name | taxa | specimens | media | media notes | chars | character
| cell scorings (scored, NPA, "-") | cell
| rules | ||||||||
Daniel Barasoain Project Administrator | 9 | 1 | 1 | 0 | 26 | 0 | 0 | 0 | 189 (174, 0, 15) | 0 | 0 | 0 |
Taxonomic Overview for Matrix 'M29235' (9 Taxa)
taxon | unscored cells |
scored cells |
no cell support |
NPA cells |
"-" cells | cell images | labels on cell images |
member access |
[1] zaedyus Taxon name last Modified on 04/09/23 | 0 | 17 | 17 | 0 | 9 | 0 | 0 | 1 |
[2] † Ronwolffia pacifica Taxon name last Modified on 06/28/23 | 1 | 22 | 22 | 0 | 3 | 0 | 0 | 1 |
[3] † Peltecoelus praelucens Taxon name last Modified on 06/28/23 | 14 | 9 | 9 | 0 | 3 | 0 | 0 | 1 |
[4] † Peltephilus strepens Taxon name last Modified on 06/28/23 | 0 | 26 | 26 | 0 | 0 | 0 | 0 | 1 |
[5] † Peltephilus pumilus Taxon name last Modified on 06/28/23 | 0 | 26 | 26 | 0 | 0 | 0 | 0 | 1 |
[6] † Peltephilus giganteus Taxon name last Modified on 06/28/23 | 10 | 16 | 16 | 0 | 0 | 0 | 0 | 1 |
[7] † Epipeltephilus recurvus Taxon name last Modified on 06/28/23 | 6 | 20 | 20 | 0 | 0 | 0 | 0 | 1 |
[8] † Epipeltephilus caraguensis Taxon name last Modified on 06/28/23 | 10 | 17 | 16 | 0 | 0 | 0 | 0 | 1 |
[9] † Epipeltephilus kanti Taxon name last Modified on 06/28/23 | 5 | 21 | 21 | 0 | 0 | 0 | 0 | 1 |
Project downloads
type | number of downloads | Individual items downloaded (where applicable) |
Total downloads from project | 10 | |
Matrix downloads | 10 | Peltephilidae Phylogeny (10 downloads); |