PHYLUM ARTHROPODA Arthropoda Characteristics:

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Presentation transcript:

PHYLUM ARTHROPODA Arthropoda Characteristics: All exhibit Bilateral Symmetry All exhibit Segmentation All possess an Exoskeleton All possess Jointed Appendages  “Jointed Foot”

ARTHROPODA TAXONOMY There are 4 major SUBPHYLA within Arthropoda Subphylum Trilobita – Now all extinct. Grand-daddy of all arthropods Subphylum Uniramia – Unbranched appendages. Insects, centipedes Subphylum Chelicerata – Possess Chelicera (usually fangs). Spiders, mites, ticks, scorpions. Subphylums Crustacea – Possess two pair of antennae and harder exoskeleton. Crabs

SUBPHYLUM - CRUSTACEA Most Crustaceans are Aquatic. -Over 35,000 species ranging in size from 0.25 mm  6 meters

-Unifying Characteristics : 1. Exoskeleton consists of the typical Chitin carbohydrate component, but made extra hard by being reinforced with Calcium Carbonate. 2. All Crustaceans will posses TWO pairs of antennae. 3. All Crustaceans will possess chomping jaw-like structures called MANDIBLES

DIVERSITY of Members

TYPICAL CRUSTACEAN – The CRAYFISH

JOINTED APPENDAGES

INTERNAL ANATOMY