The US Endangered Species Act (ESA) allows listing of subspecies and other groupings
below the rank of species. This provides the US Fish and Wildlife Service and the National …

At least three different issues are commonly referred to by the term “the species problem”:
one concerns the necessary properties of species, a second the processes responsible for …

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 issue of species delimitation has long been confused with that of species
conceptualization, leading to a half century of controversy concerning both the definition of …

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 …

Contemporary species concepts are diverse. Nonetheless, all share the fundamental idea
that species are segments of Uneages at the population level of biological organization …

Botrytis cinerea is a major crop pathogen infesting> 220 hosts worldwide. A cryptic species
has been identified in some French populations but the new species, B. pseudocinerea, has …

In Plato's Phaedrus, Socrates is concerned with how things are grouped together and how
they are divided. He makes an analogy with carving up an animal. Just as cuts of meat …

Premise of research. Salvia is one of the most species-rich genera in the world. Its
outstanding diversity and subcosmopolitan distribution have prevented the preparation of a …

Background Speciation begins when populations become genetically separated through a
substantial reduction in gene flow, and it is at this point that a genetically cohesive set of …