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26 terms

Groups of Arthropods

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Describe the subphylum Crustaceans.
-aquatic
-crabs, shrimps, lobsters, crayfishes
-2 pairs of antennae: sense organs and swimming
-2-3 body sections
-Head
-Thorax
-Abdomen
-Cephalothorax
-Mandible: chewing mouthpart
-4 pairs walking legs
Name some examples from the subphylum Crustacea.
-crabs, shrimps, lobsters, crayfishes
How many paris of antennae do Crustaceans have?
2
What are the pairs of antennae that the Crustaceans have called?
-sense organs
-swimming
How many body sections do Crustaceans have?
2-3
What are the body parts of the Crustaceans?
-head
-thorax
-cephalothorax
-abdomen
What is the chewing mouthpart of a crustacean?
Mandible
What is the mandible?
The chewing mouthpart of a crustacean
How many pairs of walking legs do Crustaceans have?
4
Describe decapods
-5 pairs of legs
-Chelipeds, claws
-swimmerets
How many pairs of legs do decapods have?
5
Decapods have __ pairs of walking legs and crustaceans have and chelicerates have
5, 4, 4
Describe the subphylum Chelicerada.
-spiders, ticks, scorpions
-mouthparts called chelicerae, contains fangs that are used to stab and paralyze prey
-2 body sections
-cephalothorax and abdomen
-lack antennae
What are the examples of Chelicerates?
spiders
ticks
scorpions
Describe the mouthpart of chelicerates
-Chelicerae, contains fangs that are used to stab and paralyze prey
What contains fangs that are used to stab and paralyze prey
Chelicerae
Describe the Chelicerae
mouthpart that has fangs that are used to stab and paralyze prey
How many body sections do chelicerates have?
2
What are the two body sections that chelicerates have?
-Cephalothorax
-Abdomen
Chelicerates have __ body sections
Crustaceans have __ body sections
What are they?
2, 2-3
-Cephalothorax
-Abdomen

-head
-thorax
-cephalothorax
-abdomen
What do chelicerates lack?
antennae
Crustaceans and decapods have these, but chelicerates do not
antennae
Insects are apart of what subphylum?
Uniramia
What organisms are in the subphylum Uniramia?
insects
centipedes
millipedes
Contains more species than any other group of organisms
Uniramia, subphylum
The subphylum Uniramia...
contains more species than any other group of organisms