Here is a key for some invertebrates.
A key for invertebrates
Notice that there are five main groups of invertebrates - arthropods, cnidarians, molluscs, worms and echinoderms. The key also shows that arthropods can be divided into three more groups - insects, arachnids and crustaceans.
Practise using this key in the next activity.
Classify the invertebrates shown in the picture.
Animal |
Invertebrate group |
jellyfish |
|
sea urchin |
|
prawn |
|
snail |
|
cockroach |
|
earthworm |
|
spider |
|
Invertebrates are very different from vertebrates. Therefore, we would expect the features used to classify invertebrates to be very different. |
