A5034741825- Evolution and Paleontology Studies
- Morphological variations and asymmetry
- Pleistocene-Era Hominins and Archaeology
- Primate Behavior and Ecology
- Bat Biology and Ecology Studies
- Image Processing and 3D Reconstruction
- Hip disorders and treatments
- Mathematics, Computing, and Information Processing
- Bone and Joint Diseases
- Orthopaedic implants and arthroplasty
- Optics and Image Analysis
- Temporomandibular Joint Disorders
- Gaussian Processes and Bayesian Inference
- Animal Ecology and Behavior Studies
- Geological and Tectonic Studies in Latin America
- Turtle Biology and Conservation
- Ichthyology and Marine Biology
- Paleontology and Evolutionary Biology
- Orthodontics and Dentofacial Orthopedics
- Forensic Anthropology and Bioarchaeology Studies
Grand Valley State University
2012-2023
New York Consortium in Evolutionary Primatology
2012-2019
Morpho (United States)
2015-2019
American Museum of Natural History
2012-2013
City University of New York
2012-2013
The Graduate Center, CUNY
2008
In this study, we assess the precision, accuracy, and repeatability of craniodental landmarks (Types I, II, III, plus curves semilandmarks) on a single macaque cranium digitally reconstructed with three different surface scanners microCT scanner. Nine researchers varying degrees osteological geometric morphometric knowledge landmarked ten iterations each scan (40 total) to test effects quality, researcher experience, landmark type levels intra- interobserver error. Two additionally specimens...
Diagenetic distortion can be a major obstacle to collecting quantitative shape data on paleontological specimens, especially for three-dimensional geometric morphometric analysis. Here we utilize the recently -published algorithmic symmetrization method of fossil reconstruction and compare it more traditional reflection & averaging approach. In order have an objective test this method, five casts female cranium Papio hamadryas kindae were manually deformed while plaster hardened. These...
Nuevos restos de litopternos bunodontes neotropicales y la sistemática Megadolodinae (Mammalia: Litopterna). Litopterna es uno los clados más diversos ungulados nativos sudamericanos. Megadolodus Neodolodus son géneros registrados en fauna tropical La Venta (Mioceno medio, Colombia). Ambos taxones fueron inicialmente identificados como didolodóntidos ‘condilártos’, pero posteriormente reclasificados Proterotheriidae, dentro Litopterna. Estudios anteriores propusieron su inclusión las...
“Suspensory locomotion” is an expression that encompasses a series of specialized forms locomotion mainly orthograde primates use to achieve below‐branch traveling. It implies number features in the entire body associated with forelimb overhead positions. The glenohumeral joint one main joints involved effective suspensory locomotion, being subject delicate balance between high degree mobility and stabilization needed successfully engage behaviors. Here, we present 3D geometric morphometric...
Abstract Researchers often attempt to use limb proportions ascertain the locomotor repertoires of fossil hominins. This can be problematic as there are few skeletons in record that preserve both a full forelimb and hindlimb; therefore, estimates lengths typically associated with substantial error. In this study, two‐block partial least squares analyses were used examine covariation between hindlimb elements extant hominoids has benefit including type functional analysis without necessitating...
Abstract One of the long‐standing arguments about evolution bipedality centers on locomotor pattern used by last common ancestor (LCA) apes and humans. In particular, knuckle‐walking has been suggested as this basis shared morphology in upper limb between African humans phylogenetic parsimony. Using three‐dimensional geometric morphometrics, study tests whether distal radius extant hominoids is sufficient for determining affiliations Plio‐Pleistocene hominins to taxa. Results indicate that...
Abstract The divergence of crown catarrhines—i.e., the split cercopithecoids (Old World monkeys) from hominoids (apes and humans)—is a poorly understood phase in our shared evolutionary history with other primates. two groups differ anatomy hip joint, pattern that has been linked to their locomotor strategies: relatively restricted motion vs. more eclectic movements hominoids. Here we take advantage first well-preserved proximal femur early Oligocene stem catarrhine Aegyptopithecus...
Heterochrony has been invoked to explain differences in the morphology of modern humans as compared other great apes. The distal femur is one area where heterochrony hypothesized morphological differentiation among Plio-Pleistocene hominins. This hypothesis evaluated here using geometric morphometric data describe ontogenetic shape trajectories extant hominine femora and place hominins within that context. Results multivariate statistical analyses showed both Homo Gorilla, changes...
Revisión sistemática de Neoreomys huilensis Fields, 1957 (Rodentia, Hystricognathi) del Mioceno Medio La Venta (Villavieja, Huila, Colombia). Ameghino, 1887 es uno los géneros roedores más representativos Suramérica. Su ha sido confusa, pero actualmente la hipótesis aceptada sitúa al género en Cavioidea, con relaciones ambiguas dentro clado. abundante y bien representado latitudes altas, dos especies Temprano Patagonia: N. australis pinturensis Kramarz, 2006. Una tercera especie, 1957, fue...
The morphology of the distal portion hominoid ulna is poorly studied despite its important functional role at wrist joint. There are five qualitatively well-described fossil hominin ulnae belonging to Australopithecus afarensis and africanus, but there have been few efforts quantify their or relate it abilities. This article presents an effort do so, using three-dimensional geometric morphometrics analyze shape Plio-Pleistocene hominins extant comparative sample great apes humans. For taxa,...
Abstract Objectives Fossils have been linked to Alouatta based on shared cranial morphology and small brain size. However, the relationship between endocranial volume shape is unclear; it possible that any platyrrhine with a may exhibit “ ‐like” features due being “de‐encephalized.” We test two hypotheses: (a) there are aspects of related encephalization common all platyrrhines; (b) these traits unite small‐brained fossils. Materials methods Three‐dimensional (ECV) were measured 350+ extant...
This contribution contains the 3D models described and figured in: New remains of Neotropical bunodont litopterns systematics Megadolodinae (Mammalia: Litopterna).Geodiversitas.