Results 11 to 20 of about 11,600 (153)
Functional Morphology of the Scaphoid in Extant African Apes, Humans and Fossil Hominins. [PDF]
Am J Biol AnthropolABSTRACT Objectives The morphology of the hominoid scaphoid has played a key role in functional and evolutionary hypotheses related to the emergence of hominin bipedalism and tool use. However, the scaphoid's complex morphology is challenging to comparatively analyze via traditional 2D linear measurements.
Steer NG +5 more
europepmc +2 more sources
An outsider on the Antarctic Peninsula: A new record of the non-native moth Plodia interpunctella (Lepidoptera: Pyralidae). [PDF]
Ecol EvolThis text reports the discovery of the microlepidopteran Plodia interpunctella at the Chilean Yelcho scientific station on Doumer Island, near the west coast of the Antarctic Peninsula. Plodia interpunctella is a global pest known for surviving in stored food for extended periods.
Benitez HA +12 more
europepmc +2 more sources
Applications in Plant Sciences, Volume 11, Issue 5, September-October 2023., 2023 Abstract Premise Imaging technologies that capture three‐dimensional (3D) variation in floral morphology at micro‐ and nano‐resolutions are increasingly accessible. In herkogamous flowers, such as those of Theobroma cacao, structural barriers between anthers and stigmas represent bottlenecks that restrict pollinator size and access to reproductive ...
Katherine A. Wolcott +4 more
wiley +1 more source
Trilobites of Thailand's Cambrian–Ordovician Tarutao Group and their geological setting
Papers in Palaeontology, Volume 9, Issue 5, September/October 2023., 2023 Abstract Tuff‐bearing upper Cambrian to lowermost Ordovician strata on Ko Tarutao island, Satun province, southernmost peninsular Thailand, contain a rich trilobite fauna relevant to global biostratigraphy, peri‐Gondwanan palaeogeography and shifting evolutionary mode.
Shelly J. Wernette +3 more
wiley +1 more source
Skeletal age during hurricane impacts fluctuating asymmetry in Cayo Santiago rhesus macaques
Ecology and Evolution, Volume 13, Issue 8, August 2023., 2023 Fluctuating asymmetry (FA), or random deviations from symmetry, can be used as a proxy for developmental instability, and anthropogenic and natural disruptions have been associated with increased levels of FA. In this study, we investigate the effect of demographic variables (age, sex, and decade of birth) and hurricane experience on FA in a model ...
Ashly N. Romero +3 more
wiley +1 more source
Constructing a multiple‐part morphospace using a multiblock method
Methods in Ecology and Evolution, Volume 14, Issue 1, Page 65-76, January 2023., 2023 Abstract Popular current methods for quantifying variation in biological shape are well‐suited to analyses of isolated parts (e.g. the same bone from the skeletons of many individuals). An analytical challenge exists for quantifying variation between the shapes of multiple‐part objects where each part has a different position, rotation or scale (e.g ...
Daniel B. Thomas +5 more
wiley +1 more source
Evolution, Volume 76, Issue 11, Page 2566-2586, November 2022., 2022 Abstract Turtles have a highly modified body plan, including a rigid shell that constrains postcranial anatomy. Skull morphology and neck mobility may therefore be key to ecological specialization in turtles. However, the ecological signal of turtle skull morphologies has not been rigorously evaluated, leaving uncertainties about the roles of ...
Guilherme Hermanson +5 more
wiley +1 more source
Web databases of feather photographs are useful tools for avian morphometry studies
Ecology and Evolution, Volume 11, Issue 12, Page 7677-7684, June 2021., 2021 Wing area and aspect ratio are key variables for studies of avian comparative ecology, despite the complexity of measuring them both in living and in museum specimens. The systematic databases of feather photographs available on the Internet may offer an alternative way of obtaining such morphometric data.
Juan E. Malo, Cristina Mata
wiley +1 more source
Acta Scientiarum: Animal Sciences, 2009 O objetivo deste trabalho foi avaliar a relação entre a morfometria da cabeça do espermatozoide e a compactação da cromatina com as taxas de clivagem e formação de blastocisto em programas de produção de embriões in vitro (PIV).
Ricardo Tomaz da Silva +2 more
doaj +1 more source