M T Silcox
Dados Biográficos
| ID | 28879 |
|---|---|
| NOME | M T Silcox |
| PRENOMES | M T |
| SOBRENOME | Silcox |
| ASSINATURA | SILCOX M T |
| AFILIAÇÕES | University of Toronto |
| ORCID | 0000-0002-4174-9435 |
| VERIFICADO | Sim |
| TOTAL DE OBRAS | 32 |
| TOTAL DE CITAÇÕES | 186 |
| TOTAL COMO AUTOR | 32 |
| TOTAL COMO EDITOR | 0 |
| PRIMEIRO ANO DE PUBLICAÇÃO | 1999 |
| ANO MAIS RECENTE DE PUBLICAÇÃO | 2026 |
| ÍNDICE H | 7 |
Comparative Sulcal Morphology of the Late Miocene Fossil Ape, Rudapithecus hungaricus
The Evolution and Development of Molar Size Among Exudate‐Feeding Lorises and Bushbabies
Dental Topographic Analysis of Living and Fossil Lorisoids
Moving away from 'the Muddle in the Middle' toward solving the Chibanian puzzle
Virtual endocast of late Paleocene Niptomomys (Microsyopidae, Euarchonta) and early primate brain evolution
The effect of high wear diets on the relative pulp volume of the lower molars
OBJECTIVES: One role of dental pulp is in the upkeep and maintenance of dentine. Under wear, odontoblasts in the pulp deposit tertiary dentine to ensure the sensitive internal dental tissues are not exposed and vulnerable to infection. It follows that there may be an adaptive advantage for increasing molar pulp volume in anthropoid primate taxa that are prone to high levels of wear. The relative volume of dental pulp is therefore predicted to cov…
Can bony labyrinth dimensions predict biological sex in archaeological samples
Osipov and colleagues [American Journal of Physical Anthropology, 2(151) 2013] previously posited that the dimensions of the bony labyrinth exhibit sexual dimorphism. Using a recent sample of known sex, they produced an age-independent, multivariate equation to predict biological sex using several of these dimensions. We aim to test the applicability of this equation to archaeological samples, where the method could prove useful with poorly prese…
Skeletal morphology of the early Paleocene plesiadapiform Torrejonia wilsoni (Euarchonta, Palaechthonidae)
The evolutionary radiation of plesiadapiforms
Very shortly after the disappearance of the non‐avian dinosaurs, the first mammals that had features similar to those of primates started appearing. These first primitive forms went on to spawn a rich diversity of plesiadapiforms, often referred to as archaic primates. Like many living primates, plesiadapiforms were small arboreal animals that generally ate fruit, insects, and, occasionally, leaves. However, this group lacked several diagnostic f…
The first major primate extinction
OBJECTIVES: The disappearance of the North American plesiadapoids (stem primates, or plesiadapiforms) in the latest Paleocene has been attributed to competition with rodents over dietary resources. This study compares molar morphology of plesiadapoids and early rodents to assess whether all taxa were adapted to consuming foods of the same structural properties with similar mechanical efficacy. MATERIALS AND METHODS: Micro-CT scans of second mandi…
Cranial anatomy of Paleogene Micromomyidae and implications for early primate evolution
First virtual endocasts of adapiform primates
Internal carotid arterial canal size and scaling in Euarchonta
Primate Origins and Supraordinal Relationships
Quantification of neocortical ratios in stem primates
Extant euprimates (=crown primates) have a characteristically expanded neocortical region of the brain relative to that of other mammals, but the timing of that expansion in their evolutionary history is poorly resolved. Examination of anatomical landmarks on fossil endocasts of Eocene euprimates suggests that significant neocortical expansion relative to contemporaneous mammals was already underway. Here, we provide quantitative estimates of neo…
A pragmatic approach to the species problem from a paleontological perspective
The ideal scenario for paleontologists would be for the species they designate to be equivalent to the species recognized for modern animals, in the sense that they were formed as a result of the same evolutionary processes. This would mean, for example, that we could be confident that in combining extant and extinct taxa in phylogenetic analyses we would be dealing with equivalent operational taxonomic units. Notwithstanding the many thousands o…
Morphological Evidence for Primate Origins and Supraordinal Relationships
New discoveries of early Paleocene (Torrejonian) primates from the Nacimiento Formation, San Juan Basin, New Mexico
Technical note
Previous study of the ear ossicles in Primates has demonstrated that they vary on both functional and phylogenetic bases. Such studies have generally employed two‐dimensional linear measurements rather than three‐dimensional data. The availability of Ultra‐ high‐resolution X‐ray computed tomography (UhrCT) has made it possible to accurately image the ossicles so that broadly accepted methodologies for acquiring and studying morphometric data can …
Endocasts of Microsyops (Microsyopidae, Primates) and the evolution of the brain in primitive primates
Semicircular canal system in early primates
The semicircular canal system and locomotion
Paleontologists reconstruct the locomotor and postural behavior of extinct species by analogy with living forms and biomechanical analyses. In rare cases, behavioral evidence such as footprints can be used to confirm fossil‐based reconstructions for predominantly terrestrial orders of mammals. For instance, the chalicothere prints from Laetoli show that these perissodactyls supported their body weight on the metacarpals, as previously reconstruct…
Primate Origins and Supraordinal Relationships
New Paleocene skeletons and the relationship of plesiadapiforms to crown-clade primates
Plesiadapiforms are central to studies of the origin and evolution of primates and other euarchontan mammals (tree shrews and flying lemurs). We report results from a comprehensive cladistic analysis using cranial, postcranial, and dental evidence including data from recently discovered Paleocene plesiadapiform skeletons ( Ignacius clarkforkensis sp. nov.; Dryomomys szalayi , gen. et sp. nov.), and the most plesiomorphic extant tree shrew, Ptiloc…
Revisiting the adaptive origins of primates (again)
Evolution of pedal grasping in Primates
Semicircular canal system in early primates
Cranial anatomy of the Paleocene plesiadapiform Carpolestes simpsoni (Mammalia, Primates) using ultra high-resolution X-ray computed tomography, and the relationships of plesiadapiforms to Euprimates
New basicrania of Paleocene‐Eocene Ignacius
Plesiadapiformes has long been considered to be an archaic group of Primates. Discovery of a paromomyid plesiadapiform skull and independent analysis of referred postcrania have led investigators to conclude that Plesiadapiformes shares a closer relationship to extant flying lemurs (Dermoptera) than to Primates (= Euprimates of Hoffstetter [1977] Bull Mem Soc Anthropol Paris Ser 13 4:327–346). Despite challenges to this interpretation, the plesia…
Endocasts of Microsyops (Microsyopidae, Primates) and the evolution of the brain in primitive primates
The first major primate extinction
OBJECTIVES: The disappearance of the North American plesiadapoids (stem primates, or plesiadapiforms) in the latest Paleocene has been attributed to competition with rodents over dietary resources. This study compares molar morphology of plesiadapoids and early rodents to assess whether all taxa were adapted to consuming foods of the same structural properties with similar mechanical efficacy. MATERIALS AND METHODS: Micro-CT scans of second mandi…
New discoveries on the middle ear anatomy of Ignacius graybullianus (Paromomyidae, Primates) from ultra high resolution X-ray computed tomography
Cranial anatomy of Paleogene Micromomyidae and implications for early primate evolution
First virtual endocasts of adapiform primates
Revisiting the adaptive origins of primates (again)
Internal carotid arterial canal size and scaling in Euarchonta
Quantification of neocortical ratios in stem primates
Extant euprimates (=crown primates) have a characteristically expanded neocortical region of the brain relative to that of other mammals, but the timing of that expansion in their evolutionary history is poorly resolved. Examination of anatomical landmarks on fossil endocasts of Eocene euprimates suggests that significant neocortical expansion relative to contemporaneous mammals was already underway. Here, we provide quantitative estimates of neo…
Skeletal morphology of the early Paleocene plesiadapiform Torrejonia wilsoni (Euarchonta, Palaechthonidae)
New discoveries of early Paleocene (Torrejonian) primates from the Nacimiento Formation, San Juan Basin, New Mexico
Moving away from 'the Muddle in the Middle' toward solving the Chibanian puzzle
The effect of high wear diets on the relative pulp volume of the lower molars
OBJECTIVES: One role of dental pulp is in the upkeep and maintenance of dentine. Under wear, odontoblasts in the pulp deposit tertiary dentine to ensure the sensitive internal dental tissues are not exposed and vulnerable to infection. It follows that there may be an adaptive advantage for increasing molar pulp volume in anthropoid primate taxa that are prone to high levels of wear. The relative volume of dental pulp is therefore predicted to cov…
Can bony labyrinth dimensions predict biological sex in archaeological samples
Osipov and colleagues [American Journal of Physical Anthropology, 2(151) 2013] previously posited that the dimensions of the bony labyrinth exhibit sexual dimorphism. Using a recent sample of known sex, they produced an age-independent, multivariate equation to predict biological sex using several of these dimensions. We aim to test the applicability of this equation to archaeological samples, where the method could prove useful with poorly prese…
Technical note
Previous study of the ear ossicles in Primates has demonstrated that they vary on both functional and phylogenetic bases. Such studies have generally employed two‐dimensional linear measurements rather than three‐dimensional data. The availability of Ultra‐ high‐resolution X‐ray computed tomography (UhrCT) has made it possible to accurately image the ossicles so that broadly accepted methodologies for acquiring and studying morphometric data can …
Virtual endocast of late Paleocene Niptomomys (Microsyopidae, Euarchonta) and early primate brain evolution
Primate evolution at the society of vertebrate paleontology
New basicrania of Paleocene‐Eocene Ignacius
Plesiadapiformes has long been considered to be an archaic group of Primates. Discovery of a paromomyid plesiadapiform skull and independent analysis of referred postcrania have led investigators to conclude that Plesiadapiformes shares a closer relationship to extant flying lemurs (Dermoptera) than to Primates (= Euprimates of Hoffstetter [1977] Bull Mem Soc Anthropol Paris Ser 13 4:327–346). Despite challenges to this interpretation, the plesia…
Primate origins and adaptations
Paleoprimatology at the Society of Vertebrate Paleontology
New discoveries on the middle ear anatomy of Ignacius graybullianus (Paromomyidae, Primates) from ultra high resolution X-ray computed tomography
Cranial anatomy of the Paleocene plesiadapiform Carpolestes simpsoni (Mammalia, Primates) using ultra high-resolution X-ray computed tomography, and the relationships of plesiadapiforms to Euprimates
Primate Origins and Supraordinal Relationships
New Paleocene skeletons and the relationship of plesiadapiforms to crown-clade primates
Plesiadapiforms are central to studies of the origin and evolution of primates and other euarchontan mammals (tree shrews and flying lemurs). We report results from a comprehensive cladistic analysis using cranial, postcranial, and dental evidence including data from recently discovered Paleocene plesiadapiform skeletons ( Ignacius clarkforkensis sp. nov.; Dryomomys szalayi , gen. et sp. nov.), and the most plesiomorphic extant tree shrew, Ptiloc…
Revisiting the adaptive origins of primates (again)
Evolution of pedal grasping in Primates
The semicircular canal system and locomotion
Paleontologists reconstruct the locomotor and postural behavior of extinct species by analogy with living forms and biomechanical analyses. In rare cases, behavioral evidence such as footprints can be used to confirm fossil‐based reconstructions for predominantly terrestrial orders of mammals. For instance, the chalicothere prints from Laetoli show that these perissodactyls supported their body weight on the metacarpals, as previously reconstruct…
Semicircular canal system in early primates
Endocasts of Microsyops (Microsyopidae, Primates) and the evolution of the brain in primitive primates
Technical note
Previous study of the ear ossicles in Primates has demonstrated that they vary on both functional and phylogenetic bases. Such studies have generally employed two‐dimensional linear measurements rather than three‐dimensional data. The availability of Ultra‐ high‐resolution X‐ray computed tomography (UhrCT) has made it possible to accurately image the ossicles so that broadly accepted methodologies for acquiring and studying morphometric data can …
New discoveries of early Paleocene (Torrejonian) primates from the Nacimiento Formation, San Juan Basin, New Mexico
Morphological Evidence for Primate Origins and Supraordinal Relationships
A pragmatic approach to the species problem from a paleontological perspective
The ideal scenario for paleontologists would be for the species they designate to be equivalent to the species recognized for modern animals, in the sense that they were formed as a result of the same evolutionary processes. This would mean, for example, that we could be confident that in combining extant and extinct taxa in phylogenetic analyses we would be dealing with equivalent operational taxonomic units. Notwithstanding the many thousands o…
Primate Origins and Supraordinal Relationships
Quantification of neocortical ratios in stem primates
Extant euprimates (=crown primates) have a characteristically expanded neocortical region of the brain relative to that of other mammals, but the timing of that expansion in their evolutionary history is poorly resolved. Examination of anatomical landmarks on fossil endocasts of Eocene euprimates suggests that significant neocortical expansion relative to contemporaneous mammals was already underway. Here, we provide quantitative estimates of neo…
The first major primate extinction
OBJECTIVES: The disappearance of the North American plesiadapoids (stem primates, or plesiadapiforms) in the latest Paleocene has been attributed to competition with rodents over dietary resources. This study compares molar morphology of plesiadapoids and early rodents to assess whether all taxa were adapted to consuming foods of the same structural properties with similar mechanical efficacy. MATERIALS AND METHODS: Micro-CT scans of second mandi…
Cranial anatomy of Paleogene Micromomyidae and implications for early primate evolution
First virtual endocasts of adapiform primates
Internal carotid arterial canal size and scaling in Euarchonta
The evolutionary radiation of plesiadapiforms
Very shortly after the disappearance of the non‐avian dinosaurs, the first mammals that had features similar to those of primates started appearing. These first primitive forms went on to spawn a rich diversity of plesiadapiforms, often referred to as archaic primates. Like many living primates, plesiadapiforms were small arboreal animals that generally ate fruit, insects, and, occasionally, leaves. However, this group lacked several diagnostic f…
Skeletal morphology of the early Paleocene plesiadapiform Torrejonia wilsoni (Euarchonta, Palaechthonidae)
Biology (28 obras) · Primate Behavior and Ecology (26 obras) · Evolution and Paleontology Studies (19 obras) · Paleontology (17 obras) · Primate (16 obras) · Evolutionary biology (15 obras) · Paleontology (15 obras) · Amphibian and Reptile Biology (13 obras) · Anatomy (12 obras) · Zoology (12 obras)