An equivocal nomenclature: What means hypsodonty?

Mones, Álvaro

doi:10.1007/bf02988789

Cited by 79 publications

(53 citation statements)

References 3 publications

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“…Later, as they develop roots (Fig. 4A), functional hypsodonty is achieved by the crown emerging (not growing) from a high mandibular ramus (protohypsodonty sensu Mones 1982). Consequently, HI would vary according to the ontogenetic stage, being higher in a fully formed tooth before emerging than in an emerged one (see Fig.…”

Section: Discussionmentioning

confidence: 99%

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

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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.

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Section: Discussionmentioning

confidence: 99%

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

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“…Explaining this incipient protohypsodonty (Mones, 1982) is not easy, given that Archaeopithecus is ancestral to any other notoungulate group; phylogenetic effects and an adaptive differential use of feeding source (substrate preference) should be considered, particularly during the middle Eocene when a global cooling occurred and open-vegetation habitats expanded in central Patagonia (Bellosi and Krause, 2014, and references therein).…”

Section: Vera-eocene Archeopithecids From Patagoniamentioning

confidence: 99%

Patagonian Eocene Archaeopithecidae Ameghino, 1897 (Notoungulata): systematic revision, phylogeny and biostratigraphy

Vera¹

2017

J. Paleontol.

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Abstract.-The Archaeopithecidae is a very poorly known group of native ungulates from the Eocene of Patagonia (Argentina), whose alpha taxonomy has remained obscure since Ameghino's times. It is traditionally considered as a family representative of the Casamayoran (middle Eocene) South American Land Mammal Age, and is thought to be morphologically close to the notopithecids. After studying >200 specimens from several institutions, including all the type specimens, a taxonomic overestimation is established. Out of the six species considered originally as archaeopithecids, Archaeopithecus rogeri Ameghino, 1897 is here recognized as the only valid name and species; subsequent synonymies are proposed and previous taxonomic hypotheses discarded. This exhaustive revision has permitted improving the knowledge of A. rogeri and, for the first time, it has revealed many craniodental characters, which allow amending its diagnosis and differentiating this taxon from other Eocene notoungulates. Archaeopithecus rogeri is a small-sized taxon characterized by its complete and rooted dentition, which is relatively higher than that of other contemporaneous short-crowned notoungulates and shows ontogenetic variation in size and morphology. The body mass range of A. rogeri (1.4-2.5 kg) is comparable to those of notopithecids and some small hegetotheriids.

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“…Pachyrukhos it is poorly developed) and high HI, from 3.24 to 7.76, including euhypsodont and protohypsodont (sensu Mones, 1982) taxa (Cassini et al, 2011(Cassini et al, , 2012aCassini and Vizcaíno, 2012;Cassini, 2013). Our results suggest a strong …”

Section: Functional Implicationsmentioning

confidence: 55%

Morphological Integration of Native South American Ungulate Mandibles. A Tribute to D’arcy Thompson in the Centennial of “On Growth and Form

Cassini

Muñoz

Vizcaı́no

2017

PEAPA

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An equivocal nomenclature: What means hypsodonty?

Cited by 79 publications

References 3 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)

Patagonian Eocene Archaeopithecidae Ameghino, 1897 (Notoungulata): systematic revision, phylogeny and biostratigraphy

Morphological Integration of Native South American Ungulate Mandibles. A Tribute to D’arcy Thompson in the Centennial of “On Growth and Form

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