Reasons for features of brachiopod adaptations

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A large pedicle opening
To support a large pedicle for secure attachment to the substrate
1 of 10
Strongly ribbed valves
To strengthen shell against wave action
2 of 10
Folded or zig-zag margin
To reduce the amount and size of sediment moving into the shells when the valves are open
3 of 10
A thick/heavy shell
To provide stability on the substrate/Protection
4 of 10
Median fold or sulcus
To seperate currents of water entering and leaving the animal/Prevent mixing of fresh water and waste
5 of 10
Extension of the valves to form 'wings'
To provide a large surface area to prevent sinking into the sediment
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Smooth or weakly ribbed valves
No need to be robust in quiet conditions
7 of 10
No pedicle opening
Pedicle not needed for attachment
8 of 10
Flat valves with a large resting area
To provide a large surface area to prevent sinking into the sediment
9 of 10
One margin of the shell upturned away from sediment
To ensure that some part of the shell remains out of the sediment for feeding
10 of 10

Other cards in this set

Card 2

Front

To strengthen shell against wave action

Back

Strongly ribbed valves

Card 3

Front

To reduce the amount and size of sediment moving into the shells when the valves are open

Back

Preview of the back of card 3

Card 4

Front

To provide stability on the substrate/Protection

Back

Preview of the back of card 4

Card 5

Front

To seperate currents of water entering and leaving the animal/Prevent mixing of fresh water and waste

Back

Preview of the back of card 5
View more cards

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