gastropods Flashcards
gastropod PHYLUM
mollusca
gastropod CLASS
gastropoda
are gastropods widespread?
yes, they are the most abundant group of molluscs
what is the gastropod shell made up of
calcite carbonate
what is gastropod apex
the first whorl of the shell, animal starts growing at this point, angle can be measured at this point (apical angle)
what is gastropod whorl
one complete turn of the shell
what is gastropod suture
line between each whorl
what is gastropod outer lip
margin of shell usually smooth to allow foot extension
what is gastropod spire
all the whorls except the most recent
what is gastropod last whorl
where the animal lives
what is gastropod siphonal canal
to extend siphons out of the shell for respiration
what is gastropod aperture
the hole where body protrudes
what is gastropod inner lip
margin of shell like outer lip it is smooth
4 types of gastropod coiling
dextral
sinistral
helical
planispiral
what is gastropod dextral coiling
right handed (aperture on the right)
gastropod sinistral coiling
left handed
gastropod helical coiling
coiled in a spiral (conical)
gastropod planispiral coiling
(flat)
difference between gastropod and cephalopod?
NO CHAMBERS in gastropod
gastropod mode of life from shell thickness
thick = high energy environment thin = low energy environment
BURROWING gastropod
tapered shell with small apical angle (long and thin) burrows into sediment with aperture upwards
high energy
long shell anchors it in place
example of BURROWING gastropod
turritella
BENTHONIC gastropod`
short siphon extending upward and forwards through which the gastropod takes in clean water for respiration
carnivorous
example of benthonic gastropod
buccinum (common whelk)
