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‘Species’ without species

Studies in History and Philosophy of Science Part A, 2021
Biological science uses multiple species concepts. Order can be brought to this diversity if we recognize two key features. First, any given species concept is likely to have a patchwork structure, generated by repeated application of the concept to new domains.
Aaron Novick, W. Ford Doolittle
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Hordeum Species ☆

2013
The genus Hordeum, the barleys, with a basic chromosome number of 2. n=. 14, comprises about 30 grass species, with cultivated barley, Hordeum vulgare, being the world's fourth most important cereal. The grain of cultivated barley has two major uses: first, for malting to produce beer and spirits and, second, for animal feed and, occasionally, human ...
Snape, J. W., Powell, W., Waugh, R.
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One species, two species, red species, lead species? Phylogenetics and species concepts with Plethodon salamanders

2017
This lab introduces students to species concepts and basic computer-based tree-building methods using published nuclear and mitochondrial sequence data for Plethodon salamanders.
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