BISC 120 - Lecture 14 Sequence Flashcards

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Vocabulary flashcards covering the evolutionary sequence of vertebrates and synapsids from Lecture 14.

Last updated 3:57 AM on 10/16/26
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10 Terms

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Pikaia / Haikouella

Early chordates (the first chordate-type animals).

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Conodont

Early jawless vertebrate (vertebrate before jaws).

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Gnathostome

Jawed vertebrate.

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Sarcopterygian

Lobe-finned fish representing the lineage toward tetrapods.

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Tiktaalik

Fish with limb-like fins (fin starting to become an arm).

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Acanthostega

Early tetrapod with limbs, but still aquatic and had gills.

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Amniote

Tetrapod with an amniotic egg, allowing reproduction on land.

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Synapsid

Mammal-side amniote characterized by one temporal fenestra.

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Dimetrodon

Basal synapsid; notably not a dinosaur.

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Therapsid

More mammal-like synapsid that is part of the lineage toward mammals.