Evolution and Biodiversity Laboratory Systematics and Taxonomy I ...
Evolution and Biodiversity Laboratory Systematics and Taxonomy I ... Evolution and Biodiversity Laboratory Systematics and Taxonomy I ...
A TAXONOMIC KEY TO THEPASTA OF SOUTHERN FLORIDA1a. Body tubular in shape ……...…...………………….......................……...….....….… 21b. Body not tubular …………….……………………….......................……........…....… 42a. Skin lined with small, symmetrical ridges ……....................…………...…......…… 32b. Skin smooth …………………………….........….....................................… Ziti edulis3a. Anterior and posterior ends of organism slanted …............................. Penna rigata3b. Anterior and posterior ends of organismperpendicular to body axis …………………......................…. Rigatonii deliciosus4a. Skin lined with small, symmetrical ridges ……….......................… Conchus crispus4b. Skin not lined with ridges ………………………..…….......................……………… 55a. Body cylindrical in overall shape ……………..............................…… Rotinii spiralis5b. Body dorsoventrally flattened in shape ……...................................... Farfalla aureaExercise II. Creating a Taxonomic KeyThere's no single correct way to create a taxonomic key, and there are several otherways one could have been arranged for your pasta species. Though it's not requiredthat a key reflect phylogenetic relationships, the most informative keys tend to do so.Work in pairs for this exercise. Now that you have seen how simple it is to use ataxonomic key, you should be able to create one yourself. In another container at yourstation you will find several "species" of hardware. At this point, it's not important thatyou can tell their evolutionary relationships to one another. You are merely trying tocreate a tool that a field hardwareologist could use to identify them.Create a dichotomous key to your hardware species, using the pasta key on theprevious page as a guide for its construction. Use your paperback copy of "A Guide toGreek and Latin Word Roots" by Donald J. Borror to create a Latinized scientific name(consisting of genus and species) for each of your species, and try to be as descriptiveas possible with the name. (Some of your individuals might be in the same genus. It'sup to you to decide!) Use proper Systema naturae rules in writing the scientific name ofyour hardware species: Genus is capitalized, species is lower case, and the entirename is italicized.systematics-4
A Key to the Hardware of Southern Florida1a.1b.2a.2b.3a.3b.4a.4b.5a.5b.6a.6b.…………..…………..…………..…………..…………..…………..…………..…………..…………..…………..…………..…………..Once you have finished your key, including all species of hardware, trade keys withthe partners across the table from you. Using each other's keys, try to identify allhardware species correctly, and check with your swap partners to see how well you didwhen you finish.II. SystematicsBecause new data constantly change our understanding of evolutionaryrelationships, classifications are constantly updated and changed. The goal of mostmodern systematists is to construct monophyletic taxa, which reflect true evolutionaryrelationships by including all descendants of a single common ancestor. Severaldifferent lines of evidence can be used to determine the degree of common ancestrybetween two taxa, includingsystematics-5
- Page 1 and 2: Evolution and Biodiversity Laborato
- Page 3: Organisms are not randomly classifi
- Page 7 and 8: To classify an unknown organism mor
- Page 9 and 10: List five homologous characters you
- Page 11 and 12: determined by identification of syn
- Page 13 and 14: Rule #3: There is no such thing as
- Page 15 and 16: The hypothetical animals used in th
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- Page 19 and 20: Exercise: Constructing a Cladogram
A Key to the Hardware of Southern Florida1a.1b.2a.2b.3a.3b.4a.4b.5a.5b.6a.6b.…………..…………..…………..…………..…………..…………..…………..…………..…………..…………..…………..…………..Once you have finished your key, including all species of hardware, trade keys withthe partners across the table from you. Using each other's keys, try to identify allhardware species correctly, <strong>and</strong> check with your swap partners to see how well you didwhen you finish.II. <strong>Systematics</strong>Because new data constantly change our underst<strong>and</strong>ing of evolutionaryrelationships, classifications are constantly updated <strong>and</strong> changed. The goal of mostmodern systematists is to construct monophyletic taxa, which reflect true evolutionaryrelationships by including all descendants of a single common ancestor. Severaldifferent lines of evidence can be used to determine the degree of common ancestrybetween two taxa, includingsystematics-5
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