Questions and Answers
What is the phylum for chordates?
What are organisms in the subphylum Urochordata commonly called?
Tunicates
What are organisms in the subphylum Cephalochordata commonly called?
Lancelets
What is the subphylum for vertebrates?
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What is the common name for organisms in the class Myxini?
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What are the organisms in the class Cephalaspidomorphi commonly known as?
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What do we call the class of organisms that include sharks, skates, and rays?
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What are organisms in the class Actinopterygii known as?
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What do we call the class of organisms that include lobed-finned fish?
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Which class does Amphibians belong to?
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What is the order that includes frogs and toads?
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What are the organisms in Order Caudata?
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What is the common name for organisms in Order Gymnophiona?
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Which class includes reptiles?
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What do we call Order Squamata?
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What is the order that includes crocodiles and alligators?
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What do we call Order Chelonia?
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What is the common name for organisms in Order Rhyncocephalia?
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What class do birds belong to?
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What is the class for mammals?
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What superclass includes both Actinopterygii and Sarcopterygii?
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What is another name for bony fish?
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What does the term Agnatha refer to?
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What are the two classes included in Agnatha?
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Study Notes
Phylum Chordata
- Chordates include all animals within this phylum, characterized by the presence of a notochord at some stage of development.
Subphylum Urochordata
- Also known as tunicates, these marine organisms exhibit a notochord only in their larval stage.
Subphylum Cephalochordata
- Lancelets belong to this group, retaining a notochord throughout their life and showcasing a filter-feeding method.
Subphylum Vertebrata
- Vertebrates are distinguished by a vertebral column (backbone), encompassing a vast array of animals.
Class Myxini
- Hagfish are classified under this class, which includes jawless fish known for their slime production and scavenging behavior.
Class Cephalaspidomorphi
- Lampreys, another group of jawless fish, are found here, notable for their parasitic habits on fish.
Class Chondrichthyes
- This class comprises sharks, skates, and rays, characterized by their cartilaginous skeletons and unique body shapes.
Class Actinopterygii
- Ray-finned fish fall under this classification, representing the most diverse group of fish with bony fins.
Class Sarcopterygii
- Lobed-finned fish are included in this class, recognized for having fleshy, lobed fins that could be precursors to limb structures in tetrapods.
Class Amphibia
- Amphibians include animals that typically undergo metamorphosis from a larval stage to an adult form, thriving both in water and on land.
Order Anura
- This order contains frogs and toads, characterized by their jumping abilities and distinct life cycles involving both aquatic and terrestrial phases.
Order Caudata
- Salamanders and newts are grouped in this order, known for their elongated bodies and ability to regenerate limbs.
Order Gymnophiona
- Caecilians, characterized by their limbless, elongated bodies and burrowing lifestyle, are classified here.
Class Reptilia
- Reptiles are ectothermic vertebrates that typically have scaly skin and lay eggs on land.
Order Squamata
- This order includes snakes and lizards, distinguished by their flexible bodies and diverse range of adaptations.
Order Crocodilia
- Comprising crocodiles and alligators, this order features semi-aquatic reptiles known for their powerful jaws and parental care.
Order Chelonia
- Turtles and tortoises are members of this order, which is defined by their protective shells and adaptations to aquatic or terrestrial life.
Order Rhyncoecephalia
- Tuataras are unique to this order, which consists of a single extant species that resembles lizards but has distinct anatomical features.
Class Aves
- Birds are warm-blooded vertebrates characterized by feathers, beaks, and typically the ability to fly.
Class Mammalia
- Mammals are endothermic vertebrates known for hair or fur and the presence of mammary glands for feeding their young.
Superclass Osteichthyes
- This group encompasses both actinopterygii (ray-finned fish) and sarcopterygii (lobed-finned fish) indicating bony fish.
Superclass Osteichthyes (alternative definition)
- Defines bony fish overall, highlighting the prominence of bone structures compared to cartilage in other fish classes.
Agnatha
- Myxini (hagfish) and cephalaspidomorphi (lampreys) are grouped here, indicating the jawless fish classification.
Agnatha (alternative definition)
- Refers to jawless fish in general, emphasizing the distinct evolutionary lineage separate from jawed vertebrates.
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Test your knowledge on the classification of chordates with these flashcards. Explore various subphyla and classes within the phylum Chordata, including tunicates, lancelets, and vertebrates. Perfect for biology students and enthusiasts!
