Study Handout Sheet

Jack Miars

Zeev Foster

Michael Mann

Mollusk Study Handout

What does Mollusk mean?_______________________________

Major Classes

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Nervous System - ________________________________________________________________________________________________________________________________________________

Reproduction –

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Digestion –

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Circulation –

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Gas Exchange –

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Excretion of Waste –

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Symmetry –

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Coelom Type –

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Major Structures –

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Dissection (What is labeled and what does it so?)

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Major Species (Name it and write one fact about it)

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On our Cart...

• Sea Slug (Dendronotus)
• Land Snail (Helix)
• Zebra Mussels (Dreissena)
• Clam (Anodota)
• Chiton (Katherina)
• Limpet (Patellogastropoda)
• Squid (Loligo)

Major Mollusk Classes

1. GASTROPODA - Snails and Slugs

2. BIVALVES - Clams

3. CEPHALOPODS - Octopus and Squids

Presentation File

http://prezi.com/gqhwk1_kl1dp/mollusks/

VIDEOS!!!

Disection

 The First picture is a far distance shot at how big our squid was to the human hand.

 This picture shows the mantle which is the large spotted structure and also the eye which is the small black dot to the right of the arms.
 This show the clear picture of the suckers which are on the arms but also the bade of the tentacles.

This is a close of picture of the removed beak.

3 Mollusk Species

Giant Squid (Architeuthis dux)

Maximum size at 13 meters (43 ft) for females and 10 meters (33 ft) for males

Giant squid are very widespread, occurring in all of the world's oceans

The inside surfaces of the arms and tentacles are lined with hundreds of sub-spherical suction cups, 2 to 5 centimeters (0.79 to 2.0 in) in diameter, each mounted on a stalk

They contain dark ink used to deter predators

Giant squid feed on deep-sea fish and other squid species. They catch prey using the two tentacles, gripping it with serrated sucker rings on the ends

http://images.nationalgeographic.com/wpf/media-live/photos/000/005/cache/giant-squid_544_600x450.jpg

Dumbo Octopus (Grimpoteuthis umbellata)

Living at extreme depths of 3,000 to 4,000 meters (9,800 to 13,000 ft), with some living up to 7,000 meters (23,000 ft) below sea level, which is the deepest of any known octopus.

They can flush the transparent layer of their skin at will, and are pelagic animals, as with all other cirrate octopuses

The largest Dumbo octopus ever recorded was 6 feet (1.8 m) in length and weighed 13 pounds (5.9 kg), although the normal size for the various species is thought to be smaller.

It is the only octopus that swallows its prey whole

They move by pulsing their arms, shooting water through their funnel, by waving their ear-like fins, or any combination thereof

http://en.wikipedia.org/wiki/File:Grimpoteuthis_discoveryi.jpg

Bigfin reef squid (Sepioteuthis lessoniana)

They are small to medium-sized squids, averaging 3.8 to 33 centimeters (1.5 to 13 in) in length

They are usually found 0 to 100 m (0 to 330 ft) below the water's surface

Bigfin reef squids exhibit strong positive phototactic behavior (attraction to light) and will move readily within a certain distance of a light source

Bigfin reef squids are one of the most commercially important squid species

Bigfin reef squids serve as hosts to the copepod ectoparasite Doridicola similis and the worm-like dicyemid endoparasites Dicyema koshidai and Dicyema orientale

http://upload.wikimedia.org/wikipedia/commons/d/d4/Squid_komodo.jpg

Mollusk Article

There are over 50,000 different types of mollusks. Mollusks are invertebrates, which means that they have no backbone. Some of the animals in the mollusk class include: snails, clams, muscles, squid, and octopuses. Mollusks have three different regions of the body the head, the visceral mass, and the foot. The Head contains the sensory organs, the visceral mass consists mainly of the internal organs, and the foot is the lower part of the body that comes into contact with the substrate.

There are seven different classes of mollusks. However, of the seven classes the four most common are the: Polyplacophora, Gastropoda, Bivalvia, and Cephalopoda. The Gastropoda class means stomach foot and consists of animals such as snails, slugs, and limpets. Another class is the Polyplacophora class the members of this class are often thought to resemble pill bugs. Bivalves are another class meaning “two shells” some of the creatures in this are: oysters, clams, muscles, and scallops. Finally, there is the Cephalopoda class, which means “head foot” this class contains animals such as octopus, squid, and cuttlefish.

http://www.oceanicresearch.org/education/wonders/mollusk.html