Lecture 7

Lecture 7 - Taxonomy and Systematics Taxonomy and...

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Taxonomy and Systematics
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1) Some terminology 2) Taxonomy: concepts and history 3) Systematics and phylogenetic trees 4) Methods of inferring phylogenies Taxonomy and Systematics
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Some terminology: Taxonomy – the science of describing, naming, and classifying organisms. Taxon (plural = taxa) – a unit of taxonomic classification Systematics – the study of biological diversity and the evolutionary relationships among organisms. Testing hypotheses about which groups have descended from a common ancestor Extinct – no longer present Extant – taxa that exist today Taxonomy and Systematics
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Terminology (continued): Phylogeny – the history of descent of a group of taxa from their common ancestors. (phylogenetics = study of phylogenies). The diagrams that depict phylogenies are phylogenetic trees. A phylogenetic tree is a systematic hypothesis.
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1) Some terminology 2) Taxonomy: concepts and history 3) Systematics and phylogenetic trees 4) Methods of inferring phylogenies Taxonomy and Systematics
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Taxonomy Used to organize groups of species into progressively smaller hierarchical groups. Originally Kingdom was the most inclusive taxonomic group
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Taxonomy (continued) “Five kingdom ” system was used for many years (even when I was a kid!) Monera Protista Fungi Plantae Animalia
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Taxonomy (continued) “Five kingdom ” system was used for many years (even when I was a kid!) Three domain system: Eukarya Archaea Bacteria
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Taxonomy (continued) One purpose of taxonomy is to name species Modern species taxonomy started with Carl Linnaeus. First introduced binomial nomenclature in his 1753 Species Plantarum ” and 1758 “ Systema Naturae editions.
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One purpose of taxonomy is to name species Modern species taxonomy started with Carl Linnaeus. First introduced binomial nomenclature in his 1753 Species Plantarum ” and 1758 “ Systema Naturae editions. Each species name has two parts:
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This note was uploaded on 02/13/2011 for the course BIO 124 taught by Professor Dr.duran during the Winter '11 term at Drexel.

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Lecture 7 - Taxonomy and Systematics Taxonomy and...

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