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A2 Fossils > gastropods > Flashcards

gastropods Flashcards

1
Q

gastropod PHYLUM

A

mollusca

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2
Q

gastropod CLASS

A

gastropoda

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3
Q

are gastropods widespread?

A

yes, they are the most abundant group of molluscs

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4
Q

what is the gastropod shell made up of

A

calcite carbonate

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5
Q

what is gastropod apex

A

the first whorl of the shell, animal starts growing at this point, angle can be measured at this point (apical angle)

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6
Q

what is gastropod whorl

A

one complete turn of the shell

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7
Q

what is gastropod suture

A

line between each whorl

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8
Q

what is gastropod outer lip

A

margin of shell usually smooth to allow foot extension

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9
Q

what is gastropod spire

A

all the whorls except the most recent

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10
Q

what is gastropod last whorl

A

where the animal lives

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11
Q

what is gastropod siphonal canal

A

to extend siphons out of the shell for respiration

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12
Q

what is gastropod aperture

A

the hole where body protrudes

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13
Q

what is gastropod inner lip

A

margin of shell like outer lip it is smooth

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14
Q

4 types of gastropod coiling

A

dextral
sinistral
helical
planispiral

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15
Q

what is gastropod dextral coiling

A

right handed (aperture on the right)

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16
Q

gastropod sinistral coiling

A

left handed

17
Q

gastropod helical coiling

A

coiled in a spiral (conical)

18
Q

gastropod planispiral coiling

A

(flat)

19
Q

difference between gastropod and cephalopod?

A

NO CHAMBERS in gastropod

20
Q

gastropod mode of life from shell thickness

A 
thick = high energy environment
thin = low energy environment
21
Q

BURROWING gastropod

A

tapered shell with small apical angle (long and thin) burrows into sediment with aperture upwards
high energy
long shell anchors it in place

22
Q

example of BURROWING gastropod

A

turritella

23
Q

BENTHONIC gastropod`

A

short siphon extending upward and forwards through which the gastropod takes in clean water for respiration
carnivorous

24
Q

example of benthonic gastropod

A

buccinum (common whelk)

A2 Fossils (13 decks)

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