112lect13 - GY 112 Lecture Notes D. Haywick (2006) 1 GY 112...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
GY 112 Lecture Notes D. Haywick (2006) 1 GY 112 Lecture Notes Fossil Taxonomy Lecture Goals : A) Linne (the Linnaean System) B) Taxonomy ordering C) Some examples (important beasties you will see in GY 112) Textbook reference: Levin 7 th edition (2003), Chapter 4 and Appendix A; Levin 8 th edition (2006), Chapter 8 and Appendix A A) Linne (Carl von Linne) Linne (1707-1778) was a Swedish naturalist who lived at a time when people were starting to really try to understand the world around them. Biology was of particular interest as there seemed to be so much of it out there (the same could be said of the biologists themselves; there are too many out there!). Anyway, to the scientists of the time, there were lots of different beasties out there, too many in fact to just haphazardly name them. It is tempting to name a particular insect after your ex-best friend (e.g., the Constantly-whining butterfly or the Looks-just-like-her! Cockroach), but without a standardized nomenclature, things would have really gotten out of control. Clearly some sort of standardized procedure was necessary and Linne was just the person to find it. Linne divided all life forms into 5 major divisions called Kingdoms . They were Animalia (animals), Plantae (plants), Fungi (mushrooms etc), Protista (originally called Protoctista; single-celled beasties like foraminifera) and Monera (bacteria). Later, the kingdoms were grouped into 2 domains ; prokaryote and eukaryote based upon the structure of the cell. As you should already know, eukaryotes possess a nucleus whereas prokaryotes do not. The following table summarizes Linne’s initial phylogeny breakdown: Domain Kingdom Animalia (animals) Plantae (plants) Fungi Eukaryota Protista (single-celled) Prokaryota Monera (bacteria etc) In the years since Linne’s work, biologists have held many discussions about his taxonomy. In the late 1980’s, Carl Woese, a biologists who studied bacterial, introduced a modification to the scheme based upon evolutionary relationships. He proposed a division of the prokaryotes into two domains; Archaea and Bacteria. Just to be annoying, he also suggested renaming the Eukaryote domain Eukarya . The latter still consists of 4 kingdoms (animals, plants, fungi, protista), but there are new kingdoms added to the Bacteria ( Protobacteria, Cyanobacteria ) and the Archaea ( Euryarchaeota , Crenarchaeota). So I guess the table needs to be modified to the following:
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
GY 112 Lecture Notes D. Haywick (2006)
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/04/2012 for the course GLY 112 taught by Professor Haywick during the Spring '12 term at S. Alabama.

Page1 / 5

112lect13 - GY 112 Lecture Notes D. Haywick (2006) 1 GY 112...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online