Évolution - 1ers poissons Flashcards

1
Q

Vertébré =?

A

Agnathes et Gnathostomes

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2
Q

Agnathes =?

A

Myxini et Petromyzontida

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3
Q

Caractéristiques des myxines?

A

Glandes a mucus, Coeurs accessoires

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4
Q

Caractéristiques des lamproies?

A

disque oral, stage larvaire long, 7 paires de branchies

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5
Q

Agnates ancestraux?

A

ostracodermes et conodontes

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6
Q

Caractéristiques des ostracodermes?

A

pas de mâchoires, armure osseuse, parfois pas de nageoire paire

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7
Q

Ostracodermes=?

A

ostéotracés, hétérostracés et anapsides

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8
Q

Caractéristique des ostéotracés?

A

nageoires paires, petits poissons

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9
Q

Caractéristiques des hétérostracés?

A

prob filtreurs

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10
Q

Caractéristiques des anapsides?

A

plus hydrodynamiques

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11
Q

écologie des myxines?

A

s’enfouit dans vase, perce corps mort, noeuds

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12
Q

écologie des larves de lamproies? des adultes?

A

jeunes filtreurs -> adultes parasites ou ne se nourrit pas

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