MinuteEarth
You Are A Fish
With our current understanding of evolutionary history and our strategy of cladistic naming, if we wanted to have both goldfish and sharks under a single group called "fish", then mammals must also be called fish....
Bozeman Science
Cladograms
Paul Andersen shows you how to construct a cladogram from a group of organisms using shared characteristics. He also discusses the process of parsimony in cladogram construction. He then explains how modern cladograms are constructed and...
Professor Dave Explains
Cladistics Part 2: Monophyly, Paraphyly, and Polyphyly
Now that we know how to construct cladograms, we have to learn some new terminology. These are the terms monophyly, paraphyly, and polyphyly, and they help us distinguish between any old taxon and true clades. Let's learn more about...
Professor Dave Explains
Cladistics Part 1: Constructing Cladograms
Before we dive into learning about all the different kinds of animals, we have a little bit of work to do. How do we describe the relationships between animals? How does phylogeny work? We have to learn about cladistics, which means we...
msvgo
Taxonomy and Nomenclature
It define taxonomy and systematics. It explain the application of taxonomy. It list the universal rules of nomenclature.