| Introduction to Chordates | Subphylm Vertebrata | Subphylum Cephalochordata | Subphylum Urochordata |
|---|---|---|---|
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Presence of a notochord
Pharyngeal gill slits Post anal tail Hollow nerve cord
What is the four main characteristics of an organism that falls into the phylum of chordata?
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Presence of hair and mammary glands.
What are two characteristics of organisms in the subphylum vertebrata, class mammalia?
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The lancelet.
What is the name of one of the organisms classified as cephalochordata?
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The tunica.
What is the outer covering of the tunicates called?
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Urochordata
Cephalochordata Vertebrata
What is the three supphlym of chordata?
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Feathers and flight skeleton.
What are two traits of organisms in subphylum vertebrata, class aves?
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The tail and notochord.
What are two parts of the lancelet that will stay with it through all stages of its life?
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The tail and the notochord.
What are two body structures that are usually lost by an adult in urochordata?
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The notochord.
Which main characteristic of a chordate is known as the longitudinal stiffening rod?
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Amniotic eggs, dry Skin, and thoracic breathing.
In class reptilia from the subphylum vertebrata, what are the three main features that these organisms exhibit?
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They live in marine sediments.
Where can the lancelet be found?
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The notochord, dorsal nerve chord, and the tail.
What three structures does the tunicate have in the larval stage?
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The ectodermal tissue.
Which type of tissue forms the spinal cord of a chordate?
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Subphylum vertebrata, class myxini.
What subphylum and class do the eel-like jawless fish and hagfish belong to?
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The caudal fin.
What is the name of the fin on the lancelet?
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The urochordata and cephalochordata.
Which two subphylums are known as the nonvertebrates?
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Ray finned fishes from class Actinopterygii and lobe finned fishes from classes Actinistia & Dipnoi.
What is the two major groups of bony fishes?
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The rostrum.
What is the anterior section of the lancelet?
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