Pollen morphology of the Swertiinae (Gentianaceae): phylogenetic implications

Pollen Morphology of the Fouquieriaceae

Pollen Morphology of Rapateaceae

A Revised Morphology of Cloudina with Ecological and Phylogenetic Implications

The conventional view of the Ediacaran index fossil Cloudina, as proposed by Grant (1990), depicts the shell structure as a series of nested test tubes. A digital serial-reconstruction of Cloudina and examination of thin sections indicates that only the bottom-most tube has a bottom and that the shell wall structure is not as well defined as previously thought. The conventional ecological recon...

Evolution of pollen morphology.

Over evolutionary time, the morphology of angiosperm pollen has evolved toward an increasing number of apertures, among other things. From a neo-Darwinian point of view, this means that (i) some polymorphism for aperture number must exist and (ii) there must be some fitness increase associated with increasing the aperture number. Pollen types with different aperture numbers often occur in the s...

The importance of palynology in the taxonomy of genus Silene, based on pollen morphology

 In this study, the palynology of 33 species of Silene belonging to 15 sections was investigated to examine the correspondence between palynology, morphological sections and phylogenetic trees. The pollen grains were prepared using the acetolysis method. Quantitative and qualitative micromorphological features of pollens were investigated using light microscopy and scanning electron microscopy....