Distinguishing Quaternary glyptodontine cingulates in 
South America: How informative are juvenile specimens?

Luna, Carlos A.; Cerda, Ignacio Alejandro; Zurita, Alfredo Eduardo; González, Romina; Prieto, M. R.; Mothé, Dimila; Avilla, Leonardo dos Santos

doi:10.4202/app.00409.2017

Cited by 6 publications

(4 citation statements)

References 33 publications

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“…A movable support (ms) is aligned with the lapidary blade. and fragility of the piece, it has been successfully employed in some instances (e.g., Luna et al, 2018). When the element to be sampled is too large to allow appropriate usage of a Dremel tool, an alternative procedure involves the extraction of a small core using a drill.…”

Section: Methodsmentioning

confidence: 99%

A Basic Guide for Sampling and Preparation of Extant and Fossil Bones for Histological Studies

Cerda

Pereyra

Garrone

et al. 2020

PEAPA

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The study of bone microstructure of fossil vertebrates (i.e., paleohistology) has demonstrated to be a very important source of paleobiological information. Paleohistological studies are based on the standardized analysis of petrographic thin sections. Although the development of new technologies (e.g., microtomography) have provided non-destructive procedures for the study the fossil tissues, thin sections are still the main source of information in paleohistology. In this contribution, we provide a detailed protocol for sampling and thin-sectioning preparation of bone tissue from both fossil and extant vertebrates. We describe the most common procedures for sampling and also some particularities related to variations in equipment and sampling techniques. The main goal of this contribution is to offer an alternative protocol for research teams of recent formation and/or with limited funding.

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Section: Methodsmentioning

confidence: 99%

A Basic Guide for Sampling and Preparation of Extant and Fossil Bones for Histological Studies

Cerda

Pereyra

Garrone

et al. 2020

PEAPA

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“…However, other later occurrences were reported as Glyptodon in Intertropical Region (Dantas et al, 2013a(Dantas et al, , 2013b, showing that both taxa may have coexisted. Indeed, the number of peripheral figures and foramina is variable with some overlap between the taxa (Dantas et al, 2013a;Zurita et al, 2012;Luna et al, 2018). The sulci are also less developed in the osteoderms of Glyptotherium (Zurita et al, 2012).…”

Section: Systematic Paleontologymentioning

confidence: 99%

“…The sulci are also less developed in the osteoderms of Glyptotherium (Zurita et al, 2012). Glyptotherium occurs in Tocantins, Rio Grande do Norte, Paraíba and Pernambuco (Dantas et al, 2013a;Luna et al, 2018).…”

Section: Systematic Paleontologymentioning

confidence: 99%

Diversity and preservation of Pleistocene tetrapods from caves of southwestern Bahia, Brazil

Silva

Berbert-Born²,

Bustamante

et al. 2019

Journal of South American Earth Sciences

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The study of two caves from the Serra do Ramalho region is here presented, this is one of the most important karstic areas in Brazil. A taxonomic analysis revealed 29 taxa including Xenarthra, Cetartiodactyla and Carnivora, ranging from Late Pleistocene to Early Holocene. Taphonomic studies reveal taphocoenosis consisting mainly of complete elements, without significant transportation, but also of transported elements, composing spatial-mixed, predominantly in situ-preserved assemblages. The predominance of Xenarthrans found within the caves is probably biased by a taphonomic pattern since these animals would have life habits related to cave environments, therefore with higher chances of preservation. There is evidence of accidental death of the scelidotheriines in Lapa dos Peixes cave, where entrapment of the animals during one or more events of river flooding is pointed as a hypothesis. Deposition took place within different periods of dry and humid climate incorporating bones in clastic and chemical deposits. Cycles of sedimentary deposition and reworking (erosion) may have acted in generating complex and overlapping depositional patterns with time averaging. During depositional phase, while the cave environment was occupied rather by Xenarthrans, parts of other animals were transported in the scope of fluvial systems and gravity loads, as well as by accidental falling or scavengers. The sedimentary deposits are currently being eroded by rain runoff in both caves, causing the reallocation of finer sediments to deeper conduits but the fossils keep close to their original location. This process is exposing a large amount of fossils, allowing extensive sampling which would be impossible with active excavations, since it would require an excessively longer time and damages to the caves.

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“…Additional information of Pliocene and Pleistocene juvenile glyptodonts appeared in different publications (Burmeister, 1870(Burmeister, -1874Ameghino, 1889;Lydekker, 1895;Castellanos, 1940;Vinacci Thul, 1945;Gillette and Ray, 1981;Oliveira et al, 2010;Carranza-Castañeda and Gillette, 2011;Chimento, 2012;Gillette et al, 2016). Other contributions exclusively referred to the description of juvenile specimens of Pliocene and Pleistocene glyptodonts are mostly based on isolated osteoderms or teeth (Rinderknecht, 2000;Zurita et al, 2009Zurita et al, , 2011Luna and Krapovickas, 2011;Zamorano et al, 2014;Luna et al, 2018), with the remarkable exception of the fetal specimen of Glyptodon Owen, 1839, described by Zurita et al (2009).…”

Section: Introductionmentioning

confidence: 99%

Juvenile Glyptodont (Mammalia, Cingulata) from the Miocene of Patagonia, Argentina: Insights into Mandibular and Dental Characters

Ruiz

Brandoni

Zurita

et al. 2020

Journal of Vertebrate Paleontology

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The earliest complete glyptodonts (Glyptodontidae, Cingulata) found belong to the Propalaehoplophorinae from Santa Cruz Formation (late early Miocene, Burdigalian) in Patagonia, Argentina. Although several skulls and mandibles have been described from this formation, and assigned to five genera (Propalaehoplophorus Ameghino, Cochlops Ameghino, Asterostemma Ameghino, Eucinepeltus Ameghino, and Metopotoxus Ameghino), the fossil record and knowledge of juvenile specimens of glyptodonts are still poor. Here, we provide a detailed morphological description of a mandible of a juvenile propalaehoplophorinae glyptodont from the Santa Cruz Formation, using micro-computed tomography and scanning electron microscopy images. We compare the juvenile mandible with adult specimens and discuss the taxonomic assignment, the juvenile and adult mandibular and dental characters, and dental eruption and tooth wear.

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Distinguishing Quaternary glyptodontine cingulates in South America: How informative are juvenile specimens?

Abstract: The subfamily Glyptodontinae (Xenarthra, Cingulata)

Cited by 6 publications

References 33 publications

A Basic Guide for Sampling and Preparation of Extant and Fossil Bones for Histological Studies

A Basic Guide for Sampling and Preparation of Extant and Fossil Bones for Histological Studies

Diversity and preservation of Pleistocene tetrapods from caves of southwestern Bahia, Brazil

Juvenile Glyptodont (Mammalia, Cingulata) from the Miocene of Patagonia, Argentina: Insights into Mandibular and Dental Characters

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