Occlusal enamel complexity and its implications for lophodonty, hypsodony, body mass, and diet in extinct and extant ungulates

Famoso, Nicholas A.; Feranec, Robert S.; Davis, Edward B.

doi:10.1016/j.palaeo.2013.07.006

Cited by 31 publications

(60 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The total occlusal surface area (OSA) is highly correlated with body mass, as has been previously reported for upper cheek teeth of notoungulates (Cassini et al 2012a) and also for other herbivorous mammals (Vizcaíno et al 2006Famoso et al 2013). In the present study, this relationship follows a negative allometric trend, opposed to the positive allometry reported by Cassini et al (2012a) for upper cheek teeth.…”

Section: Discussionsupporting

confidence: 84%

“…On the contrary, in Protypotherium and toxodontids, in which premolars are not or are less molarised, the premolars have a lower OTA than the molars. As proposed by Famoso et al (2013), OTA has a strong correlation with the enamel length (OEL) in extant ungulates. Therefore, the analysis of these two variables, OTA (and their sum OSA) and OEL, leads to the same conclusion.…”

Section: Discussionmentioning

confidence: 92%

“…These authors remarked that the relationship of ECC and hypsodonty with factors such as teeth effectiveness, food physical attributes and the ingestion of soil particles, remains elusive. Famoso et al (2013) found that OEL alone was useless for determining feeding strategies.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Teeth complexity, hypsodonty and body mass in Santacrucian (Early Miocene) notoungulates (Mammalia)

Cassini

Pino

Muñoz

et al. 2015

Earth and Environmental Science Transactions of the Royal Socie

View full text Add to dashboard Cite

Notoungulates, native South American fossil mammals, have been recently objective of several palaeoecological studies. Ecomorphology and biomechanics of the masticatory apparatus, together with micro and mesowear analyses on tooth enamel, were applied in order to understand their palaeobiology. In particular, the relationship between some dental traits (hypsodonty, occlusal surface area and complexity) and body mass is still poorly understood. These features were measured by means of the hypsodonty index (HI), occlusal surface area (OSA) and tooth area (OTA), enamel crest complexity (ECC) and length (OEL). The relationships between these indices were evaluated in five pan-contemporaneous Santacrucian Notoungulata genera from Patagonia: Adinotherium and Nesodon (Toxodontia), Interatherium, Protypotherium and Hegetotherium (Typotheria). While OSA, OTA and OEL were size dependent and strongly correlated, HI and ECC were size independent. All notoungulates analysed have very hypsodont teeth, indicating high rates of tooth wear in response to an increase of abrasives consumed with the food; their tooth occlusal area and complexity could be related to chewing efforts associated with the toughness of the plants consumed. HI, OSA and ECC were considered useful for palaeoecological reconstructions, but the results presented here show that these three features are integrated as a complex, so should not be evaluated separately.

show abstract

Section: Discussionsupporting

confidence: 84%

Section: Discussionmentioning

confidence: 92%

See 1 more Smart Citation

Teeth complexity, hypsodonty and body mass in Santacrucian (Early Miocene) notoungulates (Mammalia)

Cassini

Pino

Muñoz

et al. 2015

Earth and Environmental Science Transactions of the Royal Socie

View full text Add to dashboard Cite

show abstract

“…Our investigation into tooth position indicates that we can safely include isolated molariform teeth in our study without taking tooth position into account if we exclude the P2 and M3. These two teeth have already been shown to be different from the other molariform teeth [7]. We also found that our data were normally distributed when the P2 and M3 were excluded.…”

Section: Discussionsupporting

confidence: 70%

“…Famoso et al [7] demonstrated that enamel complexity is expressed significantly differently at each tooth position. Equid P2 and M3 are easily identifiable in isolation: the P2 has a mesially pointed occlusal surface while the M3 is tapered distally.…”

Section: Introductionmentioning

confidence: 99%

Occlusal Enamel Complexity in Middle Miocene to Holocene Equids (Equidae: Perissodactyla) of North America

Famoso

Davis

2014

PLoS ONE

Self Cite

View full text Add to dashboard Cite

Four groups of equids, “Anchitheriinae,” Merychippine-grade Equinae, Hipparionini, and Equini, coexisted in the middle Miocene, but only the Equini remains after 16 Myr of evolution and extinction. Each group is distinct in its occlusal enamel pattern. These patterns have been compared qualitatively but rarely quantitatively. The processes influencing the evolution of these occlusal patterns have not been thoroughly investigated with respect to phylogeny, tooth position, and climate through geologic time. We investigated Occlusal Enamel Index, a quantitative method for the analysis of the complexity of occlusal patterns. We used analyses of variance and an analysis of co-variance to test whether equid teeth increase resistive cutting area for food processing during mastication, as expressed in occlusal enamel complexity, in response to increased abrasion in their diet. Results suggest that occlusal enamel complexity was influenced by climate, phylogeny, and tooth position through time. Occlusal enamel complexity in middle Miocene to Modern horses increased as the animals experienced increased tooth abrasion and a cooling climate.

show abstract

Tissue Mechanical Forces and Evolutionary Developmental Changes Act Through Space and Time to Shape Tooth Morphology and Function

Calamari

Klein

2018

BioEssays

View full text Add to dashboard Cite

Efforts from diverse disciplines, including evolutionary studies and biomechanical experiments, have yielded new insights into the genetic, signaling, and mechanical control of tooth formation and functions. Evidence from fossils and non-model organisms has revealed that a common set of genes underlie tooth-forming potential of epithelia, and changes in signaling environments subsequently result in specialized dentitions, maintenance of dental stem cells, and other phenotypic adaptations. In addition to chemical signaling, tissue forces generated through epithelial contraction, differential growth, and skeletal constraints act in parallel to shape the tooth throughout development. Here we review recent advances in understanding dental development from these studies and discuss important gaps that can be filled through continued application of evolutionary and biomechanical approaches.

show abstract

Occlusal enamel complexity and its implications for lophodonty, hypsodony, body mass, and diet in extinct and extant ungulates

Cited by 31 publications

References 42 publications

Teeth complexity, hypsodonty and body mass in Santacrucian (Early Miocene) notoungulates (Mammalia)

Teeth complexity, hypsodonty and body mass in Santacrucian (Early Miocene) notoungulates (Mammalia)

Occlusal Enamel Complexity in Middle Miocene to Holocene Equids (Equidae: Perissodactyla) of North America

Tissue Mechanical Forces and Evolutionary Developmental Changes Act Through Space and Time to Shape Tooth Morphology and Function

Contact Info

Product

Resources

About