The taxonomic challenge posed by cryptic species (two or more distinct species classified as
a single species) has been recognized for nearly 300 years, but the advent of relatively …

Electroreception, the capacity to detect external underwater electric fields with specialised
receptors, is a phylogenetically widespread sensory modality in fishes and amphibians. In …

The fish faunas of continental South and Central America constitute one of the greatest
concentrations of aquatic diversity on Earth, consisting of about 10 percent of all living …

Natural selection arising from resource competition and environmental heterogeneity can
drive adaptive radiation. Ecological opportunity facilitates this process, resulting in rapid …

Nuclear sequence data, often from multiple loci, are increasingly being employed in
analyses of population structure and history, yet there has been relatively little evaluation of …

Background Molecular taxonomy studies and barcoding projects can provide rapid means of
detecting cryptic diversity. Nevertheless, the use of molecular data for species delimitation …

(Received 14 June 2019; accepted 23 September 2020) We examine notions of taxonomic
'impediment','gap','inflation'and 'anarchy', all of which are increasingly prevalent in …

Evolution creates and sustains biodiversity via adaptive changes in ecologically relevant
traits. Ecologically mediated selection contributes to genetic divergence both in the …

Discovering cryptic species in well‐studied areas and taxonomic groups can have profound
implications in understanding eco‐evolutionary processes and in nature conservation …

Competition theory states that multiple species should not be able to occupy the same niche
indefinitely. Morphologically, similar species are expected to be ecologically alike and …