Phylum Arthropoda

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Phylum Arthropoda

• Jointed appendages
• Exoskeleton
• Bilateral symmetry
• Open Circulatory System
• Well developed nervous system with a Brain
• Well developed muscles

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Subphylum Uniramia

• Unbranched appendages

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Subphylum Uniramia

• Unbranched appendages
• Jaws

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Jaws
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Subphylum Uniramia

• Unbranched appendages
• Jaws
• One pair of antennae

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Class Insecta

• Six walking legs
• Three body sections

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Mosquito
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Dragonfly
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Wasp
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Ants
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Grasshopper
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Praying Mantis
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MonarchButterfly
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Butterfly Metamorphosis
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Zebra Butterfly
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Bee
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Walking stick
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Class Chilopoda

• Has many body segments
• Each segment has one pair of legs
• Centipedes

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Centipede fangs
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Class Diplopoda

• Each segment has two pairs of legs
• millipedes

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Subphylum Chelicerata

• Specialized Mouth Parts
• Chelicerae
• Move up down (stab)
• Often have fangs
• Pedipalps (used to grab prey)

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Pedipalps
Chelicerae with Fangs
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Subphylum Chelicerata

• Specialized Mouth Parts
• 2 body sections
• cephalothorax
• abdomen

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Class Arachnida
8 Walking Legs
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Spiders
8 Simple eyes Silk glands
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Banana Spider
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Crab Spider
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Flame Tarantula
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Tarantula
Chelicerae
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Scorpion
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Chelicerae
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Scorpion Chelicerae
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Deer Tick
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Tick under a microscope
Chelicerae
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Mite
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Water mite
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Class Merostomata
Horseshoe Crab Only living member of this class
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Horseshoe crab chelicerae
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Horseshoe Crab
Compound eyes Book gills
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Many Taxonomists split the class Merostomata into
two classes

• Xiphosura horseshoe crabs
• Eurypterida - eurypterids

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Subphylum Crustacea

• 10 legs
• Two pair of antennae
• Mandibles (chewing mouthparts)

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Blue Crab Mandibles
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Subphylum Crustacea

• 10 legs
• Two pair of antennae
• Mandibles (chewing mouthparts)
• 2 or 3 body parts
• Predominantly aquatic

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Spiny Lobster
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Banded Coral Shrimp
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Anemone Shrimp
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Anemone Shrimp
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Petersons Shrimp
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Shrimp
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Red Night Shrimp
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Spider Crab
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Arrow Crab
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Star-eyed Hermit Crab
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Decorator Crab
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Gooseneck Barnacles
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http//www.oceanfootage.com/video_clips/HH10_012
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Pill Bug