Sunrise, Wizard Islet, British Columbia
Spring 2008
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Dr. Brian K. Penney
Goulet 2320
603 641-7149
bpenney@anselm.edu
Sunrise, Wizard Islet, British Columbia |
Spring 2008
|
Dr. Brian K. Penney |
LECTURE STATUS
Students will get a brief introduction to animal diversity on Tuesday week 5, but will otherwise be unfamiliar with the material. The lecture exam is on Thursday week 5.
You can find the relevant lecture notes for these major characters here: The evolution of animal diversity
You can find the lecture notes on the phyla covered in this lecture here Basal invertebrates
1) Major concepts: Body plan characters:
a) Tissue layers
b) Coelom, pseudocoelom, acoelomate conditions. Text Fig 18.3b-d.
c) Completeness of digestive system (blind gut, complete unspecialized, complete specialized)
d) Symmetry (bilateral, radial, asymmetrical) Text Fig 18.3a
e) Protostome versus deuterostome characters. Note acoelomate animals are outside these categories, so it can be less confusing to students if you add an "NA" character state.
2) Specifics for each phylum listed are under that subsection. In general, the students are trying to see the structures presented in the diagrammatic views in the lab manual. This is not that easy!
3) For each phylum, students must also examine/sketch organisms from the side table with diversity specimens
4) A glaring error in our lab manual is that there are no figures of what the slides actually look like. A nice guide with labeled pictures of the slides can be found at University of Alberta Invertebrate Zoology Labs. I have added diagrams from Brusca and Brusca's Invertebrates textbook, second edition, below as appropriate. They have way more detail than students need to know: just keep students looking for the general animal features discussed above.
I know the pictures are a little small on this page. Just "right click" on them and choose to open the picture in a new window and you can see it full sized.
LAB SCHEDULE
Introduction (10 min)
1. PORIFERA (15 min)
2. CNIDARIA (15 min)
3 PLATYHELMINTHES (20 min)
4. NEMATODA (10 min)
5. ANNELIDA (20 min)
QUIZ (10 min)
Students learn how sponges are constructed, learn to see choanocytes (collar cells)
Required Equipment: Sponges (Porifera)| Type | # | Per | Item | Section | Notes |
|---|---|---|---|---|---|
| S | 1 | Pair | Grantia XS | Sponges (Porifera) | 155A |
| E | 1 | Pair | Compound microscope | Sponges (Porifera) | |
| Sp | 2 | Class | preserved sponges | Sponges (Porifera) |
Students learn how cnidarians are constructed: learn to see 2 tissue layer body plan, , radial symmetry, incomplete digestive system and cnidocytes (stinging cells)
Hydra longitudinal section
| Type | # | Per | Item | Section | Notes |
|---|---|---|---|---|---|
| L | 1 | Class | Hydra | Anemones, Jellyfish, etc. (Cnidaria) | should come with Daphnia for students to feed to them! |
| S | 1 | Pair | Hydra XS | Anemones, Jellyfish, etc. (Cnidaria) | 165 |
| Sp | 1 | Class | Obelia sp. | Anemones, Jellyfish, etc. (Cnidaria) | 166 |
| Sp | 1 | Class | Anemone | Anemones, Jellyfish, etc. (Cnidaria) | |
| Sp | 1 | Class | Gonionemus | Anemones, Jellyfish, etc. (Cnidaria) | |
| Sp | 1 | Class | Aurelia | Anemones, Jellyfish, etc. (Cnidaria) |
Students learn how flatworms are constructed, learn to see acoelomate body plan (no internal space except lumen of gut), incomplete digestive system, bilateral symmetry, 3 tissue layers
Flatworm cross section and organs. 
| Type | # | Per | Item | Section | Notes |
|---|---|---|---|---|---|
| Sp | 1 | Class | Preserved tapeworm | Flatworms (Platyhelminthes) | |
| L | 1 | Class | Planaria sp. | Flatworms (Platyhelminthes) | |
| E | 1 | Class | pinch of raw hamburger to feed to planaria | Flatworms (Platyhelminthes) | |
| S | 1 | Pair | Planaria XS | Flatworms (Platyhelminthes) | 176 |
Students learn how nematodes are constructed, learn to see pseudocoelomate body plan (no mesoderm/muscle around gut), muscle layers, complete digestive system but unspecialized
Nematode cross section. 
| Type | # | Per | Item | Section | Notes |
|---|---|---|---|---|---|
| S | 1 | Pair | Ascaris XS | Roundworms (Nematoda) | 206 |
| Sp | 2 | Class | preserved Ascaris | Roundworms (Nematoda) | get one male and one female per class, dissect as demo? |
Students learn how segmented worms are constructed, learn to see coelomate body plan (muscle and mesenteries around gut) with a full coelom often used for burrowing, segmentation, chaetae, complete digestive system with specialized regions
Earthworm cross section
| Type | # | Per | Item | Section | Notes |
|---|---|---|---|---|---|
| S | 1 | Pair | Lumbricus XS | Segmented worms (Annelida) | 220 |
| Sp | 1 | Class | preserved earthworm (Lumbricus) | Segmented worms (Annelida) | dissect one per class as demo? |
| Sp | 1 | Class | preserved clamworm (Nereis) | Segmented worms (Annelida) | |
| Sp | 1 | Class | preserved leeches (Hirudo) | Segmented worms (Annelida) |
A printable syllabus, with course dates, required materials, grading and other policies can be found here.
A one page printable version of the schedule can be found here.
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