Structure and composition of tooth enamel in quaternary soricines (Mammalia)

Moya-Costa, Raquel; Cuenca‐Bescós, Gloria; Bauluz, Blanca; Rofes, Juan

doi:10.1016/j.quaint.2017.04.039

Cited by 6 publications

(14 citation statements)

References 34 publications

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“…Using the division of enamel reported by Moya‐Costa et al . (), three layers with their zones in the enamel are visible in the BSE image. Layer 1 (L1) is characterized by the presence of holes that correspond to sections of micron‐sized tubules remaining from the adjacent dentine.…”

Section: Resultsmentioning

confidence: 97%

“…Here, we have used the division of enamel established in Moya‐Costa et al . () on the basis of a transverse section of a fossil incisor of Sorex sp. It is important to take this into account in order to understand the differences between the zones and layers described there and in the present work.…”

Section: Discussionmentioning

confidence: 99%

“…Working with polished sections allows direct analysis of the Fe‐pigmented areas that, as Moya‐Costa et al . () describe, are not on the tooth surface. On the other hand, with this preparation the distance from the analysed points to the EDS detector is constant, and this made it possible to semi‐quantify the signals obtained and to obtain semi‐quantitative results for the elements.…”

Section: Methodsmentioning

confidence: 99%

“…In soricids, the Moya‐Costa et al . () criterion was used; this is based on the structural characteristics (the relation between interprismatic matrix and enamel prisms) and the chemical composition. The availability of more orientations here allows a three‐dimensional description of layers and zones.…”

Section: Methodsmentioning

confidence: 99%

“…Recently, and for the first time, it has been studied by Moya‐Costa et al . () in the incisors of two fossil shrews dating from the Quaternary, Sorex sp. and Dolinasorex glyphodon .…”

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confidence: 99%

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Structure and composition of the incisor enamel of extant and fossil mammals with tooth pigmentation

Moya-Costa

Bauluz

Cuenca‐Bescós

2019

LET

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The inclusion of iron compounds in teeth, which impart a red to orange colour to them, is a phenomenon shown by several groups of vertebrates in different periods of their evolution. Incisors from fossil and extant shrews and from extant rodents were sectioned and studied with the techniques of scanning electron microscopy (SEM), transmission electron microscopy (TEM) and scanning transmission electron microscopy (STEM) to compare their structure and the distribution of Fe. The enamel in white‐ and red‐toothed soricids has three layers; two of them are divided into two zones in the red‐toothed species. However, the most external layer varies among taxa; it is well defined in Sorex but difficult to identify in the Early Pleistocene genera Beremendia or Dolinasorex. In the arvicoline rodent Terricola, only two layers can be defined, the outer of which is divided into two zones depending on the presence or absence of Fe. The Fe proportions in the larger soricids reach up to 45%, but in rodents only up to 10% (weight % with respect to Fe + Ca + P). The STEM study shows that in a fossil soricid the Fe phases form clusters of nanometric particles of very poor crystalline oxides or hydroxides surrounding the apatite crystals that form the enamel.

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Section: Resultsmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…Recently, and for the first time, it has been studied by Moya‐Costa et al . () in the incisors of two fossil shrews dating from the Quaternary, Sorex sp. and Dolinasorex glyphodon .…”

mentioning

confidence: 99%

See 3 more Smart Citations

Structure and composition of the incisor enamel of extant and fossil mammals with tooth pigmentation

Moya-Costa

Bauluz

Cuenca‐Bescós

2019

LET

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Quantum Magnetic Imaging of Iron Biomineralization in Teeth of the Chiton Acanthopleura hirtosa

et al. 2020

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Iron is critical for life. Nature capitalizes on the physical attributes of iron biominerals for functional, structural, and sensory applications. Iron biomineralization is well exemplified by the magnetite‐bearing radula of chitons, the hardest known biomineral of any animal. Although magnetism is an integral property of iron biominerals, limited information exists on the magnetic state, structure, and orientation of these nanoscale materials during mineralization. The advent of quantum‐based magnetic microscopy provides a new avenue to probe these biological systems directly, providing detailed magnetic information of the iron oxide structures. Here two complementary quantum magnetic microscopy methods are applied, based on nitrogen‐vacancy centers in diamond, to spatially map the mineral phases ferrihydrite and magnetite in the developing teeth of the chiton Acanthopleura hirtosa. The images reveal previously undiscovered long‐range magnetic order, established at the onset of magnetite mineralization. This is in contrast to electron microscopy studies that show no strong common crystallographic orientation. The implications of these results are important, not just for the insights gained in biomineralization of the target organism, but also for the study of a broad range of iron minerals in the physical and biological sciences.

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Small mammals (Insectivora, Rodentia, Lagomorpha) from the Early Pleistocene hominin-bearing site of Dmanisi (Georgia)

Agustı́

Chochishvili

Lózano-Fernández

et al. 2022

Journal of Human Evolution

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Structure and composition of tooth enamel in quaternary soricines (Mammalia)

Cited by 6 publications

References 34 publications

Structure and composition of the incisor enamel of extant and fossil mammals with tooth pigmentation

Structure and composition of the incisor enamel of extant and fossil mammals with tooth pigmentation

Quantum Magnetic Imaging of Iron Biomineralization in Teeth of the Chiton Acanthopleura hirtosa

Small mammals (Insectivora, Rodentia, Lagomorpha) from the Early Pleistocene hominin-bearing site of Dmanisi (Georgia)

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