Results 21 to 30 of about 4,157,285 (290)

Delimiting Species in Recent Radiations [PDF]

open access: yesSystematic Biology, 2007
Despite considerable effort from the systematics community, delimiting species boundaries in recent radiations remains a daunting challenge. We argue that genealogical approaches, although sometimes useful, may not solve this important problem, because recently derived species often have not had sufficient time to achieve monophyly. Instead, we suggest
H Bradley, Shaffer, Robert C, Thomson
openaire   +2 more sources

Excluding spatial sampling bias does not eliminate oversplitting in DNA‐based species delimitation analyses

open access: yesEcology and Evolution, 2021
DNA barcoding and DNA‐based species delimitation are major tools in DNA taxonomy. Sampling has been a central debate in this context, because the geographical composition of samples affects the accuracy and performance of DNA barcoding.
Daniel Lukic   +4 more
doaj   +1 more source

Integrative species delimitation helps to find the hidden diversity of the leaf-litter frog Ischnocnema manezinho (Garcia, 1996) (Anura, Brachycephalidae), endemic to the southern Atlantic Forest [PDF]

open access: yesPeerJ, 2023
Background The delimitation of cryptic species is a challenge for biodiversity conservation. Anurans show high cryptic diversity levels, and molecular species delimitation methods could help identify putative new species.
Caroline Batistim Oswald   +4 more
doaj   +2 more sources

Genome-wide species delimitation analyses of a silverside fish species complex in central Mexico indicate taxonomic over-splitting

open access: yesBMC Ecology and Evolution, 2022
Background Delimiting species across a speciation continuum is a complex task, as the process of species origin is not generally instantaneous. The use of genome-wide data provides unprecedented resolution to address convoluted species delimitation cases,
Victor Julio Piñeros   +5 more
doaj   +1 more source

Fast genome-based delimitation of Enterobacterales species.

open access: yesPLoS ONE, 2023
Average Nucleotide Identity (ANI) is becoming a standard measure for bacterial species delimitation. However, its calculation can take orders of magnitude longer than similarity estimates based on sampling of short nucleotides, compiled into so-called ...
Julie E Hernández-Salmerón   +2 more
doaj   +2 more sources

Disentangling the identity of Lebertia porosa Thor, 1900 using integrative taxonomy (Acari: Hydrachnidia)

open access: yesEuropean Journal of Taxonomy, 2022
Initial analyses of DNA barcode data from Norwegian populations attributed to the water mite Lebertia porosa Thor, 1900 revealed large genetic divergence and potentially cryptic species-level diversity.
Valentina Tyukosova   +3 more
doaj   +1 more source

Species Delimitation with Gene Flow [PDF]

open access: yesSystematic Biology, 2016
Species are commonly thought to be evolutionarily independent in a way that populations within a species are not. In recent years, studies that seek to identify evolutionarily independent lineages (i.e., to delimit species) using genetic data have typically adopted multispecies coalescent approaches that assume that evolutionary independence is formed ...
Nathan D, Jackson   +3 more
openaire   +2 more sources

Using phylogenetic and coalescent methods to understand the species diversity in the Cladia aggregata complex (Ascomycota, Lecanorales). [PDF]

open access: yesPLoS ONE, 2012
The Cladia aggregata complex is one of the phenotypically most variable groups in lichenized fungi, making species determination difficult and resulting in different classifications accepting between one to eight species.
Sittiporn Parnmen   +5 more
doaj   +1 more source

A species delimitation approach in the Trochulus sericeus/hispidus complex reveals two cryptic species with a sharp contact zone [PDF]

open access: yes, 2009
Background: Mitochondrial DNA sequencing increasingly results in the recognition of genetically divergent, but morphologically cryptic lineages. Species delimitation approaches that rely on multiple lines of evidence in areas of co-occurrence are ...
Dépraz, Aline   +11 more
core   +1 more source

Exploring the Leaf Beetle Fauna (Coleoptera: Chrysomelidae) of an Ecuadorian Mountain Forest Using DNA Barcoding.

open access: yesPLoS ONE, 2016
BackgroundTropical mountain forests are hotspots of biodiversity hosting a huge but little known diversity of insects that is endangered by habitat destruction and climate change.
Birthe Thormann   +5 more
doaj   +1 more source

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