groups most prominent Flashcards by Ben Gilbert | Brainscape

Q

reefs sclerosponges = stromatoporoids

A

devonian

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Q

Gymnosperms (conifers, etc.) - first seed plant

A

middle to late paleo

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Q

Lycopods (coal swamps)

A

penn period

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Q

Trilobites

A

cambrian-silurian

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Q

Crinoids

A

late paleo

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Q

Scleractinia - stony coral

A

late turassic

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Q

cephalopods

A

early paelo

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Q

placoderms - first vertibrate with jaw

A

devonian

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Q

sharks

A

mid-creat

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Q

Labyrinthodonts - extinct amphibian

A

late paleo - early meso

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Q

Coelacanths - ancestor of land vertebraes

A

early-mid paleo

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Q

pelycosaurs - reptile

A

cabrian-early perm

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Q

Aritachs - dissapear when oceans become nutrient rich

A

early paleo

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Q

graptolites -

A

mid paleo

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