Intraspecific variabilities in 25 IITA accessions of African yam bean (AYB) (Sphenostylis stenocarpa Ex. A. Rich.) Harms were assessed through characterization of 36 morphological characters. The intraspecific variabilities among the accessions were evaluated by the following statistical analysis tools: Analysis of Variance (ANOVA), principal component and cluster analysis (Semi partial Rsquare...

The rise of molecular techniques in the study of evolutionary histories has resulted in a gradual abandonment of morphological characters as the only sources of phylogenetic inference. However, morphological characters may be valuable for phylogenetic reconstruction, especially for tracking adaptive changes across phylogeographic groups defined by genetic markers. We examined the discriminative...

Animal life in caves has fascinated researchers and the public alike because of the unusual and sometimes bizarre morphological adaptations observed in numerous troglobitic species. Despite their worldwide diversity, the adaptations of cave millipedes (Diplopoda) to a troglobitic lifestyle have rarely been examined. In this study, morphological characters were analyzed in species belonging to f...

Ranunculus L. with about 600 species is the largest genus in the Ranunculaceae. Problems in the taxonomy of the genus are due to high variability and polymorphism among different individuals and populations of certain species. Morphological characters of nectar scale have been considered as valuable taxonomical characters in some perennial species in some groups (Praemorsa, Grumosa, Rhizomatosa...

Morphological, numerical and chemical taxonomy of the genus Crataegus was studied in the East and northeast of Iran. More than 80 fresh specimens as well as 50 herbarium specimens from different localities were examind. Using vegetative and reproductive morphological characters an identification key is provided for all taxa. For numerical taxonomy 85 morphological characters were measured and t...

The pseudoscorpions Chthonius (Chthonius) carinthiacus Beier, 1951 and Chthonius (Ephippiochthonius) tuberculatus Hadži, 1937, are recorded for the first time from Slovakia. An illustrated description of these species is provided based on their morphological and morphometric characters. The descriptions of the species offer an update on the variability of their morphological and morphometric ch...

While the monophyly of most insect orders is well supported by morphological data, relationships among orders are still largely undecided. Postulated interordinal relationships are often based on relatively few morphological characters or characters of questionable phylogenetic signifi cance. In studies based on molecular evidence interordinal relationships are usually not signifi cantly suppor...

The investigation of natural variability of metric morphological characters in frog gastrulation revealed that in genetically and environmentally homogeneous samples of embryos their variability is of a higher order of magnitude than that known for quantitative metric characters in adult organisms. Matching the coefficients of variation of characters under consideration to the specific rates of...

Intraspecific variabilities in 25 IITA accessions of African yam bean (AYB) (Sphenostylis stenocarpa Ex. A. Rich.) Harms were assessed through characterization of 36 morphological characters. The intraspecific variabilities among the accessions were evaluated by the following statistical analysis tools: Analysis of Variance (ANOVA), principal component and cluster analysis (Semi partial Rsquare...