Buscar
Mostrando ítems 11-20 de 23
The significance of meristic changes in the flowers of Sapotaceae
Sapotaceae belongs to the heterogeneous order Ericales and exhibits extensive diversity in floral morphology. Although pentamery is widespread and probably the ancestral condition, some clades are extremely variable in ...
First complete skull of an octodontoid (Rodentia, Caviomorpha) from the Early Miocene of South America and its bearing in the early evolution of OctodontoideaPremier crâne complet d’un octodontoïde (Rodentia, Caviomorpha) du Miocene inférieur d’Amérique du Sud : apport a l’évolution précoce des Octodontoidea
(Elsevier France-editions Scientifiques Medicales Elsevier, 2011-09)
Octodontoidea is the most diverse group of caviomorph rodents. The systematics of most of the fossil representatives has been essentially based upon dental characters. Described here is an almost complete skull with dentition ...
Comparative karyotype analysis and chromosome evolution in the genus Aplastodiscus (Cophomantini, Hylinae, Hylidae)
(Biomed Central Ltd., 2012-04-20)
Background: The frogs of the Tribe Cophomantini present, in general, 2n = 24 karyotype, but data on Aplastodiscus showed variation in diploid number from 2n = 24 to 2n = 18. Five species were karyotyped, one of them for ...
Floral vasculature and its variation for carpellary supply in Anthurium (Araceae, Alismatales)
(2017-01-01)
Introduction and Aims. Anthurium is the largest genus of Araceae, with 950 species distributed in the neotropics. Despite the great diversity of the genus, the knowledge of its floral vasculature is based on observations ...
Comparative karyotype analysis and chromosome evolution in the genus Aplastodiscus (Cophomantini, Hylinae, Hylidae)
(Biomed Central Ltd., 2012-04-20)
Background: The frogs of the Tribe Cophomantini present, in general, 2n = 24 karyotype, but data on Aplastodiscus showed variation in diploid number from 2n = 24 to 2n = 18. Five species were karyotyped, one of them for ...
Phylogenetic comparative methods improve the selection of characters for generic delimitations in a hyperdiverse Neotropical orchid clade
(2019)
Taxonomic delimitations are challenging because of the convergent and variable nature of phenotypic
traits. This is evident in species-rich lineages, where the ancestral and derived states and their gains
and losses are ...
Desenvolvimento pós-embrionário de Nothocrax urumutum (Spix, 1825) em cativeiro (Aves, Cracidae)
(Universidade Federal do Rio de JaneiroBrasilMuseu NacionalPrograma de Pós-Graduação em Ciências Biológicas (Zoologia)UFRJ, 2018)
Embriologia de Nymphaea L. (Nymphaeales - Nymphaeaceae): implicações para a evolução inicial das angiospermas
(Universidade Estadual Paulista (Unesp), 2016-02-16)
Compreender a diversidade das Nymphaeales, considerado como o segundo ramo da filogenia das angiospermas, é de considerável interesse como modelo da evolução inicial das angiospermas. Este trabalho objetivou investigar a ...