The importance of hybridization in plant speciation and evolution has been debated for
decades, with opposing views of hybridization as either a creative evolutionary force or …

▪ Abstract Species are routinely used as fundamental units of analysis in biogeography,
ecology, macroevolution, and conservation biology. A large literature focuses on defining …

The species problem has triggered the publication of an almost infinite number of theoretical
and practical studies, including quite a number of books. I should, therefore, perhaps briefly …

The long-awaited revision of the industry standard on phylogenetics Since the publication of
the first edition of this landmark volume more than twenty-five years ago, phylogenetic …

We define a genetic species as a group of genetically compatible interbreeding natural
populations that is genetically isolated from other such groups. This focus on genetic …

The literature about species concepts might be larger than that about any other subject in
evolutionary biology, but the issue of empirically testing species boundaries has been given …

Many species comprise multiple cytotypes that represent autopolyploids, or presumed
autopolyploids, of the basic diploid cytotype. However, rarely has an autopolyploid been …

Understanding the history and philosophy of biological systematics (phylogenetics,
taxonomy and classification of living things) is key to successful practice of the discipline. In …

The nature and definition of species continue to be matters of debate. Current views of
species often focus on their nature as lineages—maximal reproductive communities through …

A total of 27 strains of Oculatella were isolated, characterized and sequenced, and analysed
phylogenetically with an additional environmental clone from the Atacama Desert and 10 …