A5064375189- Primate Behavior and Ecology
- Evolution and Paleontology Studies
- Bat Biology and Ecology Studies
- Wildlife Ecology and Conservation
- Pleistocene-Era Hominins and Archaeology
- Rabies epidemiology and control
- Marine animal studies overview
- Physiological and biochemical adaptations
- Human-Animal Interaction Studies
- dental development and anomalies
- Cleft Lip and Palate Research
- Temporomandibular Joint Disorders
- Natural product bioactivities and synthesis
- Forensic Anthropology and Bioarchaeology Studies
- Facial Nerve Paralysis Treatment and Research
- Urological Disorders and Treatments
- Craniofacial Disorders and Treatments
- Bone and Dental Protein Studies
- Oral and Craniofacial Lesions
- Muscle Physiology and Disorders
Washington University in St. Louis
2023-2024
University of Missouri
2019-2022
Johns Hopkins Medicine
2016-2020
Johns Hopkins University
2016-2020
The Scarborough Hospital
2016
University of Toronto
2016
ABSTRACT Objectives The disappearance of the North American plesiadapoids (stem primates, or plesiadapiforms) in latest Paleocene has been attributed to competition with rodents over dietary resources. This study compares molar morphology and early assess whether all taxa were adapted consuming foods same structural properties similar mechanical efficacy. Materials Methods Micro‐CT scans second mandibular molars (M 2 s) ( n = 181) ischyromyid (early fossil) 13) evaluated using Dirichlet...
Plesiadapiforms, appearing near the Cretaceous-Paleogene boundary, represent first primate radiation and show a diverse array of tooth morphologies. Dental topographic metrics provide quantitative data on occlusal surface shape. We used three metrics, Dirichlet Normal Energy, Relief Index, 3D Orientation Patch Count Rotated, to assess changes in morphology lower fourth premolars second molars taxonomically broad sample one family plesiadapiforms, Paromomyidae, stretching more than 15 million...
Dental topographic metrics provide quantitative, biologically meaningful data on the three-dimensional (3D) form of teeth. In this study, three dental (Dirichlet normal energy (DNE), relief index (RFI), and orientation patch count rotated (OPCR)) are used to evaluate presence dietary niche overlap between North American plesiadapoid primates (Plesiadapidae, Carpolestidae, Saxonellidae) early rodents. Calculation these requires researchers modify 3D surface models teeth by cropping them a...
Previous descriptive work on deciduous dentition of primates has focused disproportionately great apes and humans. To address this bias in the literature, we studied 131 subadult nonhominoid specimens (including 110 newborns) describing tooth morphology assessing maximum hydroxyapatite density (MHD). All were CT scanned at 70 kVp reconstructed 20.5-39 μm voxels. Grayscale intensity from scans was converted to (HA) (mg HA/cm
Our knowledge of muscle anatomy and physiology in vertebrates has increased dramatically over the last two-hundred years. Today, much is understood about how muscles contract functional meaning muscular variation at multiple scales. Progress profited from availability broad comparative samples, advances microscopy have permitted comparisons increasingly finer scales, progress many carefully designed executed experiments. Several avenues future work are promising. In particular, ontogeny...
Herein, we compared the developmental maturity of cranium, limbs, and feeding apparatus in a perinatal common vampire bat relative to its mother. In addition, introduce method for combining two computed tomographic imaging techniques three-dimensionally reconstruct endocasts poorly ossified crania. The Desmodus specimens were scanned using microcomputed tomography (microCT) diffusible iodine-based contrast-enhanced CT image bone soft tissues. Muscles jaw endocranial cavity segmented...
Diet has been suggested to play an important role in developmental pacing. Somatic growth and dental development are expected be slow frugivorous primates because of seasonal food shortages greater competition for with adults, whereas folivorous grow more rapidly resources less limited and/or folivores need better equipped than weanlings break down fibrous foods. Here, we present the first dataset on mass fiber architecture jaw adductors newborn strepsirrhines assess differences maturity...
Abstract Tusks are ever‐growing teeth present in mammals of the clade Paenungulata. Unlike perpetually growing incisors rodents, tusks not used mastication, and at least some paenungulatans, tusk is composed dentin alone adults. Few studies have provided tissue‐level information on adult paenungulatans with embedding techniques that identify epithelial other soft tissues. In order to examine mineralized tissues as well cells form teeth, we studied a single, subadult rock hyrax ( Procavia...
The mammalian feeding system is made up of multiple components that influence facial variation, including the masticatory muscles, bony jaw apparatus, and teeth. However, it not fully understood how development these are coordinated impacted by life history diet. Bats only mammals continue to nurse until they almost adult size, often after become volant. Common vampire bats (Desmodus rotundus) have a relatively prolonged juvenile period among bats, can nine months, later solely subsist off...
The first known primate fossil from the Atlantic Coastal Plain, a mandibular fragment representing family Omomyidae, is described early Eocene Fisher/Sullivan Site in northeastern Virginia. jaw, containing m1–m2, was found near base of Potapaco Member, Bed B, Nanjemoy Formation, indicating an Ypresian age, ca. 54.5 Ma. As specimen lacks diagnostic antemolar dentition, its precise identity cannot be confidently determined. However, diminutive size and plesiomorphic molar morphology suggest...
The masticatory system is involved in a key period mammalian development – the transition from suckling to independent feeding. A number of biomechanically important anatomical changes occur through ontogeny. Changes morphology cranium and bony jaw apparatus can modify regions where muscles originate insert, therefore alter orientation how forces are directed during biting. ontogeny have been noted several taxa, suggested achieve more vertical occlusal (perpendicular bite plane) for In this...