Deuterostome Evolution Lab

NOTE: Enrollment in the Deuterostome Evolution Lab will be completed on the bulletin board in the Study Center, beginning at 12PM on October 31.

NOTE: Lab practicals will be offered on Monday, November 21, and Tuesday, November 22. When signing up for your lab session and practical, keep in mind that the Thanksgiving holiday does not begin until 1 pm on Wednesday, November 23. Plan your travel accordingly. There will be NO MAKE-UP EXAMS offered.

ALSO NOTE: You will dissect a specific organism in the lab but are responsible for learning the material for all the animals discussed. This will require study outside of lab.

To prepare for your scheduled lab section you must :

1. Attend the Deuterostome Evolution lecture on November 8 in Uris Hall G01 at 9:05 AM.
2. Review pages 536-543, 654-661, 693-695, and 697-720 in your textbook.
3. Read the lab guide in the Survival Manual (pp. L55-L97) before lab, and the dissection instructions for the specimen that you signed up to dissect in lab.
4. Complete the deuterostome lab objectives on pp. L57-L62.
5. Be prepared for a short quiz on pages 536-543 and 654-661 in your text and objectives 1-8.
6. Bring the lab guide (pp. L54-L140) to lab.

After Lab:

1. Be certain to clean up after yourself in lab. Students who fail to clean up after themselves will lose points!
2. Come to the Study Center early and often to learn the anatomy of the animals you did not dissect in lab. Specimens will be available and TAs will be around to help.
3. Take the practical exam. The exam will have both written and practical portions. The practical portion will consist of ~22 stations with 4 questions at each station. You will have 90 seconds at each station. Note: NO MAKE-UP PRACTICAL will be offered.

Deuterostomes Demo:

Protostomes vs. Deuterostomes

• Embryological distinction

Phylogenetic Trees

• Intro to Phylogenetic Trees
• Homology and Analogy

Deuterostome Diversity and Evolution

Phylum Echinodermata

• Important features of the group
• Examples

Phylum Hemichordata

• Important features of the group
• Examples

Phylum Chordata

• Important features of the group
• Examples

Evolutionary relationships: Echinoderms - Hemichordates - Chordates

• Evidence for shared ancestry
• Chordate Origins via Paedomorphosis

Chordate Groups

Subphylum Urochordata

• Important features of the group
• Paedomorphosis - An evolutionary connection between larval urochordates and other chordates
• Anti-cancer drugs under development derived from sea squirts!

Subphylum Cephalochordata (Amphioxus / Branchiostoma)

• Important features of the group

Subphylum Vertebrata (Craniata)

• Important features of the group
• The movement to land - Tetrapod evolution (required reading)

• Vertebrate Groups:
  • Jawless fish
    • Pacific Lamprey
      
  • Cartilagenous fish
    • Spiny Dogfish (Shark
  • Bony fish
  • Perch
  • Amphibians
    • Salamander (Necturus)
    • Frog
  • Reptiles (including Birds)
    • Turtle
    • Pigeon
  • Mammals
    • Rat

Comparative Anatomy - Deuterostome Systems

• Circulatory and Urogenital System Diagrams from Lab Overheads
  • Lamprey, shark and Necturus circulation
  • Necturus and frog circulation
  • Turtle and pigeon circulation
  • Lamprey and Necturus urogenital
  • Shark and turtle urogenital
  • Pigeon and rat urogenital

Images of dissections with labeled anatomy (new!)

• Lamprey
• Sea Star
• Shark
• Necturus
• Turtle
• Pigeon

Other Resources

• Deuterostome FAQ - Under Construction!

In The News

• DiscoveryNews.com
  • Oldest Vertebrate Fossil Discovere
• Science Magazine
  • Does hair really make mammals special?
  • Sand dollars "split" when predators are around
  • Inching onto Land - Ichthyostega origins
  • Fish that talk?? 
  • Where did Jaws come from?
• Others
• Birds get high on dinosaur breathing - Reptiles/Birds
• Meet Tiktaalik roseae - the "fishapod"
• Indiscriminate exploitation of sea cucumber in Cuba threatens its survival -Echinoderms
• Virgin Shark Birth!
  
• Leading Lampreys by the Nose - Lamprey pheromones
  
• Nature
  • Archaeopteryx stripped of its bird title
  • Zoology: Larva flow - Properties of sea lily larvae provide support for Garstang's proposal that the chordate central nervous system derives from the ciliated bands of an ancestral chordate tadpole larva.
• Biological bodice-ripper - Coevolution of a lizard and a flower in the Tasmanian highlands.
• Sea Creature Confused for its Lunch -Echinoderms
• Getting a head - Can the vertebrate head develop without neural crest tissue?
• In the foothills of the headlands - Amphioxus gives clues about the origins of the vertebrate head