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Divesity of Arthropods (Crustaceans (Feeding and Digestion: mandibles that…
Divesity of Arthropods
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Crustaceans
Feeding and Digestion: mandibles that open sideways, and some use their legs to kick food into their mouth
Movement: they have 5 pairs of legs; chelipeds catch and crush food (1 pair) and walking legs are used for locomotion(4 pairs)
Habitats: marine, freshwater, and terrestrial habitats
Reproduction: they have swimmerets which are small legs behind walking legs which are used for mating
Diversity: consist of 35000 species; include crabs,shrimps, crayfish, and pill bugs.
Arachnids 
Diversity
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Ticks, mites, and scorpions
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Segments and Appendages
Ticks, mites, and scorpions
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Horseshoe crabs
Unsegmented heavy exoskeleton; 5 pairs of appendages: chelicerae, pedipalps, three pairs of walking legs
Spiders
Cephalothorax + Abdomen
Chelicerae: pincers and fangs
Pedipalps: holding prey, reproduction,sensing environment
Walking legs: 4 pairs
Spinnerets: located at posterior; produces silk to make webs
Feeding and Digestion
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Ticks, mites, and scorpions
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Reproduction
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Ticks, mites, and scorpions
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