Vertebrate Morphology > Other Terms > Flashcards

Other Terms Flashcards

(12 cards)

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1
Q

Urochordata

A

Larvae resemble chordates, adults are sessile and have outer tunic

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2
Q

Cephalochordata

A

Distinct anterior and posterior end, blood flows forward centrally and caudad dorsally

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3
Q

Hemichordata

A

Acorn worms, closest relative of Chordata, possess pharyngeal slits

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4
Q

Protostomes

A

Blastopore becomes mouth

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5
Q

Deuterostomes

A

Blastopore becomes anus

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6
Q

Pikaia

A

Earliest fossil chordate

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7
Q

Symplesiomorphy

A

Shared ancestral characteristics

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8
Q

Synapomorphy

A

Shared derived characteristics

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9
Q

Plesiomorphy

A

Shared ancestral trait

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10
Q

Apomorphy

A

Derived trait

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11
Q

Grade

A

Common ancestor and some, but not all, of its descendants

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12
Q

“protochordates”

A

Urochordata and Cephalochordata

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Vertebrate Morphology
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