GEOL 247 Lab 5 (2024)

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University of Saskatchewan *

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247

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Anthropology

Date

Apr 3, 2024

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docx

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/2 Exercise 1. (Fill-in-the-blank) Use your lab and lecture resources to compare and contrast brachiopods and bivalves. Phylum Brachiopoda Class Bivalvia (Mollusca) Symmetry Feeding Structure How they open and close their shells Most Common Composition /3 Exercise 2. (Written answer) Compare the mode of life of clams, mussels, oysters, and scallops. What change in mode of life and feeding style occurred in bivalve evolutionary history? When did most siphonate forms evolve and how did that impact marine sediments? /6 Exercise 3. (Drawing, x2) Draw both the exterior and interior of a heterodont bivalve displayed in the lab. For the exterior view, label the growth lines, the lunule, and the umbo. For the interior view, label the hinge, the ligament groove, the pallial line, and the pallial sinus. {{Drawing boxes found below, for ease of printing}} /6 Exercise 4. (Drawing, x2, Written answer) Draw both the exterior and interior of an isodont bivalve displayed in the lab. Label the anterior, posterior, dorsal and ventral sides, as well as the hinge line and the auricles. Is this a left or right valve, and how do you know? What do you think might be the function of the auricles?

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