Tomochika Fujisawa

TL;DR: These findings support the robustness of GMYC as a tool for delimiting species when only single-locus information is available and argue that this might represent a fundamental limit due to the nature of evidence used to delimit species in this approach.

TL;DR: A modified GMYC model is developed that allows for a variable transition from coalescent to speciation among lineages and provides a method of species discovery and biodiversity assessment using single-locus data from mixed or environmental samples while building a globally available taxonomic database for future identifications.

TL;DR: A CO1 data set of aquatic predaceous diving beetles of the tribe Agabini is presented and it is shown that even if samples are collected to maximize the geographical coverage, up to 70 individuals are required to sample 95% of intraspecific variation, showing that the geographical scale of sampling has a critical impact on the global application of DNA barcoding.

TL;DR: DNA-based species delimitation may be compromised by limited sampling effort and species rarity, including "singleton" representatives of species, which hampers estimates of intra- versus interspecies evolutionary processes, and low sampling may be compensated for by "clade addition" of lineages outside of the focal group.

TL;DR: Lineages from presumed stable habitats, and therefore displaying lower dispersal ability and migration rates, showed greater levels of mtDNA clustering and geographical subdivision than their close relatives inhabiting ephemeral habitats.