Results 91 to 100 of about 1,074,895 (298)

Previously undocumented regional variability in crab‐eating macaque skull sexual dimorphism and its implications for biological and morphometric studies

The Anatomical Record, EarlyView.
Abstract In a large sample of adult crab‐eating macaques, we quantified sexual dimorphism in size, shape, and covariance across the whole skull and among anatomical regions of the cranium and mandible. All regions showed significant mean sex differences, but the magnitude of size and shape dimorphism varied substantially.
Andrea Cardini, Paul O'Higgins
wiley   +1 more source

Evolutionary processes and its environmental correlates in the cranial morphology of western chipmunks (Tamias). [PDF]

, 2017
The importance of the environment in shaping phenotypic evolution lies at the core of evolutionary biology. Chipmunks of the genus Tamias (subgenus Neotamias) are part of a very recent radiation, occupying a wide range of environments with marked niche ...
Assis, Ana Paula A, Marroig, Gabriel, Patton, James L, Rossoni, Daniela M   +3 more
core  

Dysmorphometrics: the modelling of morphological abnormalities [PDF]

, 2012
BACKGROUND: The study of typical morphological variations using quantitative, morphometric descriptors has always interested biologists in general. However, unusual examples of form, such as abnormalities are often encountered in biomedical sciences ...
Dirk Vandermeulen, John Clement, Katleen Daniels, Mark Walters, Paul Suetens, Peter Claes   +5 more
core   +3 more sources

Pelvic morphology and body size in relation to the preauricular sulcus: Evidence from medieval to modern Iberia

The Anatomical Record, EarlyView.
Abstract The preauricular sulcus has long been debated as a pelvic feature variably attributed to obstetric stress, ligamentous traction, and broader biomechanical processes. To clarify its determinants, we analyzed 409 adult individuals from three archeological and one early modern skeletal collection from the Iberian Peninsula, integrating graded ...
Rebeca García‐González, Julia Muñoz‐Guarinos, Nico Cirotto, Sonia Díaz‐Navarro, Laura Rodríguez, José Miguel Carretero   +5 more
wiley   +1 more source

On the importance of examining the relationship between shape data and biologically meaningful variables. An example studying allometry with geometric morphometrics. [PDF]

, 2013
Geometric morphometrics (GM) is a tool for the statistical analysis of shape on Cartesian landmark coordinates. However, because GM studies commonly focus on the description of morphological trends within shape space (or morphospace), the predictive ...
Blanco-Miranda, David, Chamero Macho, Beatriz, Martín-Abad, Hugo, Marugán-Lobón, Jesús   +3 more
core  

Multivariate morphometric analysis of Eptesicus (Mammalia : Chiroptera) in Australia

Australian Journal of Zoology, 1978
(Uploaded by Plazi for the Bat Literature Project) Multivariate analyses of measurements of different Eptesicus species were carried out. The results sup­ ported a recent taxonomic revision based on type of baculum, and indicated criteria for identification of females, and of males lacking prepared bacula.
Carpenter, Sm, McKean, Jl, Richards, Gc
openaire   +3 more sources

Elliptic Fourier analysis as a tool for the taxonomic identification of isolated theropod pedal phalanges

The Anatomical Record, EarlyView.
Abstract Studies of Upper Cretaceous deposits in North America have provided invaluable insights into the continental ecosystems of this time. Theropod (Saurischia, Dinosauria) pedal phalanges are commonplace in these deposits but can be difficult to identify at a finer taxonomic resolution.
Trystan M. Warnock‐Juteau, Stephanie M. Smith, Thomas M. Cullen   +2 more
wiley   +1 more source

On the identity of broad-shelled mussels (Mollusca, Bivalvia, Mytilus) from the Dutch delta region [PDF]

, 2011
Late Quaternary (Eemian) deposits of the Netherlands contain shells that resemble those of living Mytilus galloprovincialis. Similar broad-shelled mytilids also occur in estuaries of the southwestern Netherlands together with slender individuals typical ...
Bos, M.M., Gittenberger, E., Groenenberg, D.S.J., Hoeksema, B.W., Hummel, H., Jansen, J.M., Raad, H., Rajagopal, S., Velde van der, G., Wesselingh, F.P.   +9 more
core   +3 more sources

Pathologies of Between-Groups Principal Components Analysis in Geometric Morphometrics

Evolutionary biology, 2019
Good empirical applications of geometric morphometrics (GMM) typically involve several times more variables than specimens, a situation the statistician refers to as “high p/n,” where p is the count of variables and n the count of specimens.
F. Bookstein
semanticscholar   +1 more source

Smaller Lateral‐to‐Medial Tibial Plateau Ratios Are Strongly Correlative With Anterior Cruciate Ligament Tears and Reconstruction Failures

Arthroscopy, EarlyView.
Purpose To compare the anterior–posterior distance ratio of the lateral‐to‐medial tibial plateau (LTP/MTP) among 3 patient groups: those with intact anterior cruciate ligaments (ACLi), primary ACL tears (ACLp), and failed ACL reconstructions (ACLf).
Hansel E. Ihn, Collin D. R. Hunter, Alexander J. Mortensen, Benjamin T. Johnson, Devin Eddington, Stephen K. Aoki, Justin J. Ernat   +6 more
wiley   +1 more source