Overview of the classes of marine mollusks.

1. Mollusca Marine Science Module 4 ~ Unit 4

4. Which ones are mollusks?

5. They all look so different! How can they all be mollusks?

10. Any questions so far?

14. Mollusca Marine Science Module 4 ~ Unit 4 ..Continued..

15. Pelecypoda

18. Pop Quiz How many siphons does a bivalve have?

19. Clam buries itself: http://www.youtube.com/watch?v=mWs-zAd1avM&feature=related

22. Which of the following mollusks are not part of the gastropoda class? Snails Squids Abalones Slugs

23. Conch

26. Octopuses or Octopi? Many people get confused about the proper plural for the word octopus. Octopus is frequently given a Latin plural, yet the word derives its second root from Greek, not Latin (the english "foot" root from Latin is "pod" or "ped", while from Greek it is "pus"). What is the proper plural, anyway? Many say "octopi." The singular looks like a Latin masculine singular, ending in "us," but it really isn't, so pluralizing it to "octopi" is not correct. Most people also mispronounce it as well. If it were "octopi," it would be pronounced "octo-pee" not "octo-pie," and that sounds silly! So, the correct plural is "octopuses," believe it or not. I prefer not to use either of them. Every time you say "octopuses" someone will correct you, and you end up in an argument. So I like to use "octopods," which is the proper plural of the taxonomic order Octopoda, containing the eight-armed cephalopods.

27. Pelecypoda

28. Polyplacophora ( chitons )- 8-plated shell Monoplacophora Scaphopoda- A.K.A. tusk shells

29. Any questions?

31. See Characteristics Overview Slide in the beginning for 7 characteristics