Results 1 to 10 of about 1,074,895 (298)

Species delimitation and recognition in the Pediomelum megalanthum complex (Fabaceae) via multivariate morphometrics [PDF]

PhytoKeys, 2015
Pediomelum is a genus endemic to North America comprising about 26 species, including the megalanthum complex, which consists of P. megalanthum and its varieties retrorsum and megalanthum, P. mephiticum, and the recently described P.
Ashley N. Egan
doaj   +3 more sources

Multivariate and Geometric Morphometrics Reveal Morphological Variation Among Sinibotia Fish [PDF]

Biology
Sinibotia species, investigated for morphology and species divergence owing to comparable body patterns and frequent sympatric occurrences, show high morphological similarity and close phylogenetic relationships, which challenge their accurate ...
Yongming Wang, Yong Xie, Yanping Li, Fei Peng, Jinping Li, Wei Jiang, Biwen Xie, Peng Fu, Zuogang Peng   +8 more
doaj   +2 more sources

Testing the Island Effect in a Highly Mobile Pollinator: Wing Morphological Divergence in Euglossa mixta from Continental and Insular Panama [PDF]

Animals
Islands provide valuable opportunities to study how isolation affects phenotypic variation. Even though orchid bees are highly mobile, their movement can still be restricted by marine barriers. In this study, we assessed whether insular isolation impacts
Yostin Añino, Jordan Hernández-Martelo, Fernando Moya, Alejandro Piñeiro-González, Laura M. Pérez, Dumas Gálvez, Yosiat Vega-Rovira, Julio Trujillo, Anette Garrido, Danilo Arrocha, Franco Cruz-Jofré, Hugo A. Benítez   +11 more
doaj   +2 more sources

Unraveling Wing Shape Variation in Malaria Mosquitoes from the Arctic Edge: A Geometric Morphometric Study in Western Siberia [PDF]

Animals
In Russia, Western Siberia, Anopheles from maculipennis subgroup comprises three vector species: An. messeae, An. daciae, An. beklemishevi, and the hybrid between An. messeae and An.
Ximena Calderon, Gleb Artemov, Vladimir A. Burlak, Svetlana Alexeeva, Raquel Hernández-P, Manuel J. Suazo, Laura M. Pérez, Hugo A. Benítez, Margarita Correa   +8 more
doaj   +2 more sources

Phylogenetic and morphological analysis of Gloydius himalayanus (Serpentes, Viperidae, Crotalinae), with the description of a new species

European Journal of Taxonomy, 2022
Gloydius is a widespread pitviper group occurring from Eastern Europe to Korea and Siberia, with only one known species, G. himalayanus (Günther, 1864), found south of the Himalayas. We provide combined genetic and morphological data for G.
Sourish Kuttalam, Vishal Santra, John Benjamin Owens, Melvin Selvan, Nilanjan Mukherjee, Stuart Graham, Anatoli Togridou, Omesh K. Bharti, Jingsong Shi, Kartik Shanker, Anita Malhotra   +10 more
doaj   +1 more source

Event review: Using multivariate analyses to interpret lithic variability: Contributions and limitations

Journal of Lithic Studies, 2021
A selection of papers presented at the Special Session 8 ‘Using multivariate analyses to interpret lithic variability: Contributions and limitations’ held during the 2018 MetroArchaeo conference (22-24 October 2018, Cassino, Italy) is published in the ...
Alice Leplongeon, Elena A.A. Garcea
doaj   +1 more source

A comparison of traditional and geometric morphometric techniques for the study of basicranial morphology in horses: a case study of the Araucanian horse from Colombia [PDF]

, 2020
Skull size and shape have been widely used to study domestic animal populations and breeds. Although several techniques have been proposed to quantify cranial form, few attempts have been made to compare the results obtained by di erent techniques. While
Bentez-Molano, Jannet, Crosby-Granados, René, Parés Casanova, Pere-Miquel, Salamanca-Carreño, Arcesio   +3 more
core   +2 more sources

A multivariate approach to morphological study of shell form in cowries (Gastropoda, Cypraeidae): a case study with Umbilia armeniaca (Verco, 1912) [PDF]

ZooKeys, 2023
Multivariate approaches to morphological study of shell form have rarely been applied to cowries (Gastropoda: Cypraeidae) with preference, instead, for comparing formulaic notations of shell form that report averages (i.e., means) for key morphometrics ...
Paul C. Southgate, Thane A. Militz
doaj   +3 more sources

Tools for quantitative form description : an evaluation of different software packages for semi-landmark analysis [PDF]

, 2015
The challenging complexity of biological structures has led to the development of several methods for quantitative analyses of form. Bones are shaped by the interaction of historical (phylogenetic), structural, and functional constrains.
Botton-Divet, Léo, Cornette, Raphael, Fabre, Anne-Claire, Herrel, Anthony, Houssaye, Alexandra   +4 more
core   +9 more sources

MorphoTools2: an R package for multivariate morphometric analysis

Bioinformatics, 2022
Abstract Summary The package MorphoTools2 is intended for multivariate analyses of morphological data. Commonly used tools are missing or scattered across several R packages. The new package, in order to make the workflow convenient and fast, wraps available statistical and graphical tools and ...
Marek Slenker, Petr Koutecký, Karol Marhold   +2 more
openaire   +2 more sources