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18 Cards in this Set
- Front
- Back
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What subphylum are Hagfish in?
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Hyperotreti
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Describe the Hagfish...
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Head supported by cartilaginous bars. Brain is enclosed in fibrous sheaths. Notochord and lack vertebrae. 4 pairs of sensory tentacles surrounding their mouths. Slime glands (ventrolateral).
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The class cephalaspidomorphi falls under which subphylum?
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Vertebrata.
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Describe lampreys...
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They are agnathans. Live in both marine and freshwater. Larva filter feeders. Adults prey on fish with sucker like lips for attachment functions, the tongue gets rid of scales. Well developed eyes. Fins--2 dorsal fins and 1 caudal fin. Salivary glands have an anticoagulant.
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What is a gnathostome?
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Vertebrate with a jaw that is evolved from pharyngeal arches.
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Why are the jaws important?
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More efficient gill ventilation. To capture and ingest a variety of food sources.
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why are paired appendages important?
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Decrease rolling during locomotion. controls tilt or pitch, and lateral steering.
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Fish in class chondrichthyes are what type of fish?
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Cartilaginous fish.
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what animals are in the class chondrichthyes?
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sharks, skates, rays, and ratfish.
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Describe the class chondrichthyes...
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Carnivorous or scavengers, marine, biting mouthparts, paired appendages, placoid scales with a tough sand paper texture. Rows of teeth.
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Describe whale sharks...
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Filter feeders, pharyngeal arch modifications that strain plankton.
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Describe skates and rays...
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Live on ocean floor and in shallow waters, they have wing like appendages, camouflage.
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Describe ratfish...
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lack scales and their gills are covered by operculum.
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What are some examples of Lobe finned fish?
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Lungfish and Coelacanths.
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What is special about chondrosteans?
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They are ray finned, but they have a cartilaginous skeleton. Ex: sturgeons and paddlefish.
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What do the majority of fish fall under?
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Ray finned--Teleosts. EX: Perch
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Why are fishes so successful?
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Easily adapt to environment. Extract oxygen from small amount of oxygen per unit volume. Efficient locomotor structures. High sensory system. Efficient reproduction.
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How can fish maintain their vertical position?
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Fishes are surrounded by buoyant oils especially in the liver use their fins to provide lift, Reduction of heavy tissue, swim bladder. ]
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