Chordate Classification Flashcards

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Questions and Answers

What is the phylum for chordates?

Phylum Mollusca

Phylum Chordata (correct)

Phylum Arthropoda

Phylum Echinodermata

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?

Subphylum Vertebrata Signup and view all the answers

What is the common name for organisms in the class Myxini?

Hagfish Signup and view all the answers

What are the organisms in the class Cephalaspidomorphi commonly known as?

Lampreys Signup and view all the answers

What do we call the class of organisms that include sharks, skates, and rays?

Class Chondrichthyes Signup and view all the answers

What are organisms in the class Actinopterygii known as?

Ray-finned fish Signup and view all the answers

What do we call the class of organisms that include lobed-finned fish?

Class Sarcopterygii Signup and view all the answers

Which class does Amphibians belong to?

Class Amphibia Signup and view all the answers

What is the order that includes frogs and toads?

Order Anura Signup and view all the answers

What are the organisms in Order Caudata?

Salamanders and newts Signup and view all the answers

What is the common name for organisms in Order Gymnophiona?

Caecilians Signup and view all the answers

Which class includes reptiles?

Class Reptilia Signup and view all the answers

What do we call Order Squamata?

Snakes and lizards Signup and view all the answers

What is the order that includes crocodiles and alligators?

Order Crocodila Signup and view all the answers

What do we call Order Chelonia?

Turtles and tortoises Signup and view all the answers

What is the common name for organisms in Order Rhyncocephalia?

Tuataras Signup and view all the answers

What class do birds belong to?

Class Aves Signup and view all the answers

What is the class for mammals?

Class Mammalia Signup and view all the answers

What superclass includes both Actinopterygii and Sarcopterygii?

Superclass Osteichthyes Signup and view all the answers

What is another name for bony fish?

Superclass Osteichthyes Signup and view all the answers

What does the term Agnatha refer to?

Jawless fish Signup and view all the answers

What are the two classes included in Agnatha?

Myxini and Cephalaspidomorphi Signup and view all the answers

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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Description

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!