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Phylum Arthropoda By: Kane Richardson. What is an Arthropod? Arthropods pollinate many of the flowering plants on Earth. Arthropods pollinate many of.

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Presentation on theme: "Phylum Arthropoda By: Kane Richardson. What is an Arthropod? Arthropods pollinate many of the flowering plants on Earth. Arthropods pollinate many of."— Presentation transcript:

1 Phylum Arthropoda By: Kane Richardson

2 What is an Arthropod? Arthropods pollinate many of the flowering plants on Earth. Arthropods pollinate many of the flowering plants on Earth. Typically segmented coelomate invertebrate animal with bilateral symmetry, an exoskeleton, and jointed appendages. Typically segmented coelomate invertebrate animal with bilateral symmetry, an exoskeleton, and jointed appendages.

3 More About Arthropods Earliest known invertebrates to exhibit jointed appendages. Earliest known invertebrates to exhibit jointed appendages. Have a hard exoskeleton to provide protection. Have a hard exoskeleton to provide protection. Most molt 4 to 7 times in their lives. Most molt 4 to 7 times in their lives. In most groups of arthropods segments have become fused into three body sections: head, thorax, and abdomen. In most groups of arthropods segments have become fused into three body sections: head, thorax, and abdomen.

4 Six Classes of Arthropods Class Arachnida- Spiders Class Arachnida- Spiders Class Crustacea- Crabs Class Crustacea- Crabs Class Chilopoda- Centipedes Class Chilopoda- Centipedes Class Diploda- Millipedes Class Diploda- Millipedes Class Merostomata- Horseshoe Crabs Class Merostomata- Horseshoe Crabs Class Insecta- Insects Class Insecta- Insects

5 Class Arachnida Ticks, mites, and scorpions are also arachnids. Ticks, mites, and scorpions are also arachnids. Over 60,000 species Over 60,000 species Most have two body regions the cephalothorax and the abdomen. Most have two body regions the cephalothorax and the abdomen. Have six jointed appendages. Have six jointed appendages. Respiratory structure either trachea or book lung. Respiratory structure either trachea or book lung. Nearly all species are terrestrial. Nearly all species are terrestrial.

6 Class Crustacea Other examples include: lobsters, and shrimp. Other examples include: lobsters, and shrimp. Aquatic and exchange gases as water flows over feathery gills. Aquatic and exchange gases as water flows over feathery gills. Only arthropods with two pair of antennae for sensing. Only arthropods with two pair of antennae for sensing. Most have five pair of legs. Most have five pair of legs. Some crustaceans have three body sections others only have two. Some crustaceans have three body sections others only have two. Approx 30,000 species. Approx 30,000 species. Have a pair of compound eyes usually on stalks. Have a pair of compound eyes usually on stalks. Most are free living. Most are free living.

7 Class Chilopoda Bodies made up of a chain of many flattened segments, each except the one behind the head and the last two bearing a single pair of appendages. Bodies made up of a chain of many flattened segments, each except the one behind the head and the last two bearing a single pair of appendages. The bite of a large centipede can be painful to an adult and dangerous to a small child. The bite of a large centipede can be painful to an adult and dangerous to a small child. Centipedes are predatory, feeding on soil inverts such as earthworms and terrestrial insects. Centipedes are predatory, feeding on soil inverts such as earthworms and terrestrial insects. Require moist microhabitats. Require moist microhabitats. Internal fertilization Internal fertilization Most are small, but some can be up to 10 inches in length. Most are small, but some can be up to 10 inches in length. Over 2,500 species. Over 2,500 species.

8 Class Diplopoda Bodies made up of numerous segments. Bodies made up of numerous segments. First four thoracic segments each bare a single pair of legs, but the following abdominal segments all have two pairs. First four thoracic segments each bare a single pair of legs, but the following abdominal segments all have two pairs. Millipedes lack poisonous fangs and do not bite. Millipedes lack poisonous fangs and do not bite. They roll into a ball and many release poisonous or foul-smelling substances. They roll into a ball and many release poisonous or foul-smelling substances. Approx 8,000 species Approx 8,000 species Most are herbivores or scavengers, living primarily on decaying plants and animal matter in moist microhabitats. Most are herbivores or scavengers, living primarily on decaying plants and animal matter in moist microhabitats.

9 Class Merostomata Feed on small inverts. Feed on small inverts. Have a large shield that covers the cephalothorax. Have a large shield that covers the cephalothorax. Compound eyes are reduced. Compound eyes are reduced. Only 5 species exist today. Only 5 species exist today.

10 Class Insecta Found in almost all terrestrial and freshwater habitats. Found in almost all terrestrial and freshwater habitats. Almost any substance with nutritive value is eaten by some group of insects. Almost any substance with nutritive value is eaten by some group of insects. Body composed of three sections. Body composed of three sections. Have a complete digestive tract. Have a complete digestive tract. Are dioecious and fertilization is internal in most. Are dioecious and fertilization is internal in most. Around one million named species. Around one million named species.

11 Pics. of Organisms in Phylum Some Real & Some Fake Fake


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