Chapter 26: Phylum Arthropoda

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Presentation transcript:

Chapter 26: Phylum Arthropoda

(PHYLUM: ARTHROPODA) Includes horseshoe crabs, spiders, insects, crustaceans, ticks, mites, centipedes & millipedes Aquatic or terrestrial Bilateral symmetry

(PHYLUM: ARTHROPODA) Segmented body: Jointed appendages - 1. Head, thorax, abdomen 2. Cephalothorax- fused head & thorax; abdomen Jointed appendages - Sensory, walking, feeding, mating, flying

(PHYLUM: ARTHROPODA) Most have compound eyes Most have separate sexes Mandibles - mouth parts

(PHYLUM: ARTHROPODA) Exoskeleton: Adv: Protection, prevents water loss Disadv: Heavy, restricts growth Molting - shedding the old exoskeleton

(PHYLUM: ARTHROPODA) 3 types of breathing structures: 1. Gills (water) 2. Tracheal tubes (land) 3. Book lungs (land)

CLASS: ARACHNIDA Spiders, scorpions, mites & ticks Terrestrial Most have a cephalothorax 4 pairs of legs

(CLASS: ARACHNIDA) Chelicerae - fangs to inject poison Pedipalps - handling food, sensing, reproduction Ocelli - 8 simple eyes

(CLASS: ARACHNIDA) No antennae No mandibles Spinnerets - secretes silk for web spinning Book lungs - gas exchange

CLASS: CRUSTACEA Crabs, lobsters, shrimp, crayfish & barnacles Most are aquatic Most have 5 pairs of legs (1 pair = claws)

Hermit crab

(CLASS: CRUSTACEA) 2 pairs of antennae Mandibles Compound eyes Antennules - balance Antennae - sensory Mandibles Compound eyes

CLASS CHILOPODA CLASS DIPLOPODA Centipedes Millipedes Flat body Round body Carnivores/ (Insectivores) Herbivores 1 pr. Legs/segment 2 pr. legs/segment

CLASS: INSECTA Flies, grasshoppers, lice, bees, beetles & butterflies Largest group of arthropods Aquatic and terrestrial 3 pairs of legs

(CLASS: INSECTA) Most have 1 or 2 pairs of wings 1 pair of antennae Mandibles Breathing structures: 1. Spiracles 2. Tracheal tubes

(CLASS: INSECTA) Complete metamorphosis 1. Egg 2. Larva 3. Pupa 4. Adult 4. ADULT 3. PUPA 1. EGG 2. LARVA

(CLASS: INSECTA) Incomplete metamorphosis 1. Egg 2. Nymph 3. Adult

THE END!

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