Generalized individual dental age stages for fossil and extant placental mammals

Anders, Ulrike; Koenigswald, Wighart von; Ruf, Irina; Smith, B. Holly

doi:10.1007/s12542-011-0098-9

Cited by 59 publications

(50 citation statements)

References 96 publications

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“…Tooth germs in a more advanced stage of development than another germ preserved in the same specimen are considered likely to erupt before the less developmentally advanced germ. This method of identifying an eruption sequence from multiple individuals follows the efforts of Slaughter et al (1974), Smith (2000, Anders et al (2011), Zack (2012, and Bastl and Nagel (2013).…”

Section: Dental Eruption Assessmentmentioning

confidence: 99%

“…In carnivorans, dentally immature individuals are usually less than a year old, hence it is justifiable to focus on a dentally mature individual as the phenotype that natural selection is primarily acting upon. This is defined by Anders et al (2011) as individual dental age stage (IDAS) 3-adult. But in hyaenodonts, the phenotype interacting with the environment for multiple years was IDAS 2 (juvenile).…”

Section: What Does the Timing Of Tooth Eruption Tell Us About Hyainaimentioning

confidence: 99%

“…In mammals, the reduction of dental replacement to diphyodonty has built a readily preserved ontogenetic calibration point into the mouths of most taxa (Anders et al, 2011). The replacement of deciduous teeth, eruption of adult dentition, and subsequent wear contribute information on the rate of maturation across lineages (e.g., Slaughter et al, 1974, Smith, 2000Asher and Lehmann, 2008;Ciancio et al, 2012;Veitschegger and Sánchez-Villagra, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Deciduous dentition and dental eruption of Hyainailouroidea (Hyaenodonta, “Creodonta,” Placentalia, Mammalia)

Borths

Stevens

2017

Palaeontol electronic

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Section: Dental Eruption Assessmentmentioning

confidence: 99%

Section: What Does the Timing Of Tooth Eruption Tell Us About Hyainaimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Deciduous dentition and dental eruption of Hyainailouroidea (Hyaenodonta, “Creodonta,” Placentalia, Mammalia)

Borths

Stevens

2017

Palaeontol electronic

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“…MCNAM-PV 3958 is recognized as a juvenile specimen (sensu Anders et al 2011) because of the presence of deciduous teeth (DP3 and dp3), the near absence of wear on the occlusal surface of the teeth, and the early erupting condition shown by several molars. Left M1 and m1-m2 have their crown bases slightly below the alveolar plane and open alveoli, indicating an incomplete eruption.…”

Section: Derivation Of Namementioning

confidence: 99%

A unique, Late Oligocene shrew-like marsupial from western Argentina and the evolution of dental morphology

Forasiepi

Goin

Abello

et al. 2013

Journal of Systematic Palaeontology

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(2014). A unique, Late Oligocene shrew-like marsupial from western Argentina and the evolution of dental morphology. Journal of Systematic Palaeontology, 12(5):549-564. DOI: https://doi.org/10. 1080/14772019.2013.799611 This article was downloaded by: [ PLEASE SCROLL DOWN FOR ARTICLETaylor & Francis makes every effort to ensure the accuracy of all the information (the "Content") contained in the publications on our platform. However, Taylor & Francis, our agents, and our licensors make no representations or warranties whatsoever as to the accuracy, completeness, or suitability for any purpose of the Content. Any opinions and views expressed in this publication are the opinions and views of the authors, and are not the views of or endorsed by Taylor & Francis. The accuracy of the Content should not be relied upon and should be independently verified with primary sources of information. Taylor and Francis shall not be liable for any losses, actions, claims, proceedings, demands, costs, expenses, damages, and other liabilities whatsoever or howsoever caused arising directly or indirectly in connection with, in relation to or arising out of the use of the Content. This article may be used for research, teaching, and private study purposes. Any substantial or systematic reproduction, redistribution, reselling, loan, sub-licensing, systematic supply, or distribution in any form to anyone is expressly forbidden. Terms & Conditions of access and use can be found at http:// www.tandfonline.com/page/terms-and-conditions We describe a new metatherian mammal, Fieratherium sorex gen. et sp. nov., found in western Argentina (Quebrada Fiera locality, southern Mendoza Province), in Late Oligocene deposits (Agua de la Piedra Formation, Deseadan age). The only known specimen is a juvenile with fragments of both dentaries, the right maxilla and a fragment of the left premaxilla with dentition. The loci and the number teeth preserved suggest a dental formula of I?3/i3, C1/c1, P3/p3, M?3/m?3. Fieratherium sorex has a convergent shrew-like appearance and a unique combination of features among metatherians and other South American mammals of Palaeogene age, including the well-known faunas of Patagonia. An analysis of its phylogenetic affinities suggests that Fieratherium is the sister-group of the Paucituberculata. As already described by other authors for several mammalian taxa, the mainly Patagonian South American Palaeogene fossil record offers little information to understanding the evolution of northern lineages. Fieratherium may represent a taxon belonging to a lineage that had its origin in Neotropical regions, so far unrecorded in the southern region of South America.http://zoobank.org/urn:lsid:zoobank.org:pub:5F6D3A50-6345-4E66-BE3E-7FEF6CC66A9B

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“…A previously developed classification system, i.e. the IDAS-system (Anders et al 2011), is too generic for the purpose of this study and therefore was not applied since it uses a rough age determination that is only suitable for a general comparison of different taxa and orders. The wear stages proposed here can be used to determine relative individual age and show the general development of dentine exposure over time.…”

Section: Introductionmentioning

confidence: 99%

Wear pattern of the molar dentition of an extant and an Oligocene bat assemblage with implications on functionality

Hielscher

Schultz

Martin

2015

Palaeobio Palaeoenv

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Wear stages have been defined based on dentine exposure at the lower molar surfaces for a population of the extant bat Pipistrellus pipistrellus (6 wear stages) and for a sample of the Oligocene bat Pseudorhinolophus antiquus (4 wear stages). Wear stages 1-2, which occur in juveniles, are characterised by punctual dentine exposure on the cusps and ridges. Wear stages 3-4, found in adult individuals, are characterised by connected areas of band-shaped dentine. The last two wear stages (5-6) reflect the dental condition of old (senile) individuals, with the molar surface showing wide areas of exposed dentine and the occlusal relief drastically reduced. The defined wear stages of the P. antiquus sample are comparable to stages 3-6 of P. pipistrellus. The molars of both species show wear facets with striations that go in two directions, indicating a two-phased, bucco-lingually directed masticatory movement which gains more freedom with progressive wear. This development underlines that shear-cutting dominates in the early stages of the mastication process, whereas in later stages a crushing component becomes increasingly dominant. Based on the average age determination of individuals from the defined wear stages, about 90 % of the studied P. pipistrellus population consists of juveniles (wear stages 1-2). In contrast, wear stages 3-5 (95 %) predominate in the studied sample of P. antiquus, indicating that most of the individuals were of an adult/senile age.

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Generalized individual dental age stages for fossil and extant placental mammals

Cited by 59 publications

References 96 publications

Deciduous dentition and dental eruption of Hyainailouroidea (Hyaenodonta, “Creodonta,” Placentalia, Mammalia)

Deciduous dentition and dental eruption of Hyainailouroidea (Hyaenodonta, “Creodonta,” Placentalia, Mammalia)

A unique, Late Oligocene shrew-like marsupial from western Argentina and the evolution of dental morphology

Wear pattern of the molar dentition of an extant and an Oligocene bat assemblage with implications on functionality

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