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Category Archives: species delimitation
The crows have eyes — but not only for members of their own species
If you are a moderately bird-interested person who’s spent much time in Seattle or Vancouver, you’ve probably had a version of the following conversation with a less bird-interested friend or family member from out of town, after one of you … Continue reading
What’s in a name? A review of cryptic species and species concepts
It is a contentious can of worms. Species concepts are both essential to understand and at the same time incredibly difficult to define. Species names allow us to discuss fundamental units of biodiversity in any ecosystem and study genome evolution, … Continue reading
Posted in evolution, Molecular Ecology, the journal, speciation, species delimitation
Tagged amphipods, biodiversity, cryptic species
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DNA sequence data shows that this "living fossil" isn't so fossilized after all
Living fossils are a tricky concept for evolutionary biology. In principle it seems simple: living organisms that closely resemble creatures seen in the fossil record going back millions of years. Usually they’re a single representative of a fossil record containing … Continue reading
Posted in adaptation, evolution, species delimitation
Tagged Allonautilus, cryptic species, ddRADseq, Nautilus
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Highlights from the Standalone Society of Systematic Biologists meeting – part 1
The 2017 standalone meeting of the Society of Systematic Biologists included expert-led debates on major issues in molecular systematics. Didn’t make it to Baton Rouge? Don’t worry – Bryan McLean and I report on the main points below, and highlight some of our … Continue reading
Posted in phylogenetics, species delimitation, Uncategorized
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The Hidden History of Kiwi Diversification
Of the millions of Earth’s species that likely remain to be described, a majority is thought to be invertebrates, plants, fungi, or microbes. Nevertheless, the pace of species description in some vertebrate groups has not slackened over the past few … Continue reading
On Integrative Species Delimitation…
Accurate delimitation of species is a fundamental first step that underlies much of what we do in biology. But this can prove challenging in many situations. Why? Let me count the ways. Incomplete lineage sorting, hybridization, morphological conservatism, and niche … Continue reading
Introgression history in sticklebacks and oaks
Speciation theory has many monikers for differential gene flow – migration, introgression, admixture, hybridization, secondary contact. As a homogenizing process, gene flow at large acts to reduce differentiation between populations post-divergence. However, selection and demography affect the rates of gene … Continue reading
The diversity hiding in lizard blood
Pathogens have got this reproduction thing figured out. Clone yourself and grow populations quickly? Sure. Occasionally reproduce sexually? Absolutely. The have-your-cake-and-eat-it-too reproductive modes among biological lineages that are capable of both sexual and asexual reproduction throw a mighty wrench … Continue reading
Posted in evolution, speciation, species delimitation
Tagged BPP, cryptic diversity, pathogens, species concepts
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