Buscar
Mostrando ítems 1-10 de 265
Biases with the generalized euclidean distance measure in disparity analyses with high levels of missing data
(Wiley Blackwell Publishing, Inc, 2019-05)
The Generalized Euclidean Distance (GED) measure has been extensively used to conduct morphological disparity analyses based on palaeontological matrices of discrete characters. This is in part because some implementations ...
Morphological disparity and systematic revision of the eocrinoid genus Rhopalocystis (Echinodermata, Blastozoa) from the Lower Ordovician of the central Anti-Atlas (Morocco)
(Paleontological Society, 2017-05)
The genus Rhopalocystis (Eocrinoidea, Blastozoa) is characterized by both a short stratigraphic range (Fezouata Shale, middle Tremadocian to middle Floian, Lower Ordovician) and a reduced geographic extension (Agdz-Zagora ...
Rapid Initial Morphospace Expansion and Delayed Morphological Disparity Peak in the First 100 Million Years of the Archosauromorph Evolutionary Radiation
(Frontiers Media, 2021-09)
Adaptive radiations have played a major role in generating modern and deep-time biodiversity. The Triassic radiation of the Archosauromorpha was one of the most spectacular vertebrate radiations, giving rise to many highly ...
Differences in mandibular disparity between extant and extinct species of metatherian and placental carnivore clades
(Wiley Blackwell Publishing, Inc, 2015-04)
There are a number of studies relating to skull morphology differences within the carnivoran clades of both placentals and metatherians. It is difficult to compare these studies because of differences in taxonomic sampling, ...
The rise of the ruling reptiles and ecosystem recovery from the Permo-Triassic mass extinction
(The Royal Society, 2018-06)
One of the key faunal transitions in Earth history occurred after the Permo-Triassic mass extinction (ca 252.2 Ma), when the previously obscure archosauromorphs (which include crocodylians, dinosaurs and birds) become the ...
Enigmatic morphological disparity in tarsometatarsi of Antarctic giant penguins
(Polish Academy of Sciences. Committee on Polar Research, 2011-03)
The only record of the Paleogene Antarctic Sphenisciformes comes from the Eocene La Meseta Formation (Seymour Island, Antarctic Peninsula). The analysis of tarsometatarsi attributed to the genus Anthropornis (“giant” ...
Enigmatic morphological disparity in tarsometatarsi of giant penguins from the Eocene of Antarctica
(Polish Acad Sciences Committee Polar Research, 2011-03)
The only record of the Paleogene Antarctic Sphenisciformes comes from the Eocene La Meseta Formation (Seymour Island, Antarctic Peninsula). The analysis of tarso− metatarsi attributed to the genus Anthropornis (“giant” ...
Blastocystis hominis and Entamoeba histolytica/Entamoeba dispar infection in patients attended in a Hospital in Niterói, Rio de Janeiro, BrazilInfecção por Blastocystis hominis e Entamoeba histolytica/Entamoeba dispar em pacientes atendidos em um hospital localizado em Niterói, Rio de Janeiro
(Universidade Federal de Goiás, 2010)
Differential Rates of Male Genital Evolution in Sibling Species of Drosophila
(Springer, 2018-06)
Genital morphology in animals with internal fertilization is considered to be among the fastest evolving traits. Sexual selection is often proposed as the main driver of genital diversification but the exact selection ...
Morphological integration and evolution of the skull roof in temnospondyl amphibians
(Springer, 2018-10)
Morphological integration refers to the phenotypic interdependence of two or more traits and is estimated by the degree of covariation or correlation among traits at different levels, such as at the intraspecific and ...