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2Q Palaeozoic World > Animal Phyla (b) - Lecture 3 > Flashcards

Animal Phyla (b) - Lecture 3 Flashcards

1
Q

What does Lagerstatte mean?

A

A deposit of remarkable fossil quantity or diversity

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2
Q

What is the index fossil for the pre Cambrian/Cambrian boundary?

A

Treptichnus pedum

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3
Q

What key characteristics surrounded the Cambrian explosion?

A

triploblastic body plans (three germ layers), Mineralised hard parts, Infaunal lifestyles, Complex ecosystems, Creation of external calcium/phosphate shells

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4
Q

What are developmental genes?

A

Regulate an organism’s development from fertilised egg to adult

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5
Q

What are the key characteristics of arthropods (e.g. trilobites) (three) ?

A

Segmented bodies, Jointed appendages, Exoskeleton

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6
Q

What are the key characteristics of Brachiopods (General) (three)

A

Bivalved shell of calcium carbonate or organophosphate, Attached by a pedicle or free lying, mantle cavity contains lophophore for feeding and respiring

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7
Q

How do you distinguish between Rhynchonelliformea and Linguliformea brachiopods?

A

Rhy. has calcareous shells, hinge, short pedicle. Ling. has organophosphate shell no hinge and a longer pedicle.

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2Q Palaeozoic World (10 decks)

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