Species‐level taxonomy derives from empirical sources (data and techniques) that assess
the existence of spatiotemporal evolutionary lineages via various species “concepts.” These …

The time is past when a research program in systematics should be based on only a few
genes, extant taxa, and ultrametric trees. Cheap genome sequencing, powerful statistical …

Species are fundamental units in biological research and can be defined on the basis of
various operational criteria. There has been growing use of molecular approaches for …

A method was developed for simultaneous Bayesian inference of species delimitation and
species phylogeny using the multispecies coalescent model. The method eliminates the …

The discovery and delimitation of species has changed dramatically over time. Species
delimitation practices became more thorough and formal in the 1900s with the introduction …

Many recent species delimitation studies rely exclusively on limited analyses of genetic data
analyzed under the multispecies coalescent (MSC) model, and results from these studies …

Most new cryptic species are described using conventional tree‐and distance‐based
species delimitation methods (SDMs), which rely on phylogenetic arrangements and …

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 …

The herpetofauna of the state of Veracruz, Mexico, currently consists of 359 species,
including 76 anurans, 45 caudates, one caecilian, one crocodylian, 217 squamates, and 19 …

With limited sampling, geographic variation within a single species can be difficult to
distinguish from interspecific variation, confounding our ability to draw accurate species …