Connor Wright

1. The phylum Arthropoda (Task 12) 4 points The Phylum Arthropoda (Task 12) Slide 1 Connor Wright

2. What is the phylum arthropoda? In biology, phylum is a taxonomic rank. There are 9 Levels of Classification that sort all living things. The phylum groups together all the classes of organisms that have the same body plan. Being an arthropod means that you are apart of the phylum Arthropoda. Arthropods don’t have a spine (they have external skeletons). They also have a segmented body and jointed appendages. Appendages are like wings or limbs. This diagram shows all the Levels of Classification in biology. The Phylum Arthropoda (Task 12) Slide 2 Connor Wright

3. The classes within the phylum This crab is apart of the Crustacea class in the phylum Arthropoda. The classes within the phylum Arthropoda: Arachnida Chilopoda Diplopoda Crustacea Epiclass Hexapoda Entognatha Insecta The Phylum Arthropoda (Task 12) Slide 3 Connor Wright

4. Describe each class in words and pictures Arachnida In the class Arachnida, there are four orders in the class. There are the orders Araneae, Acari, Opiliones and Scorpiones. Araneae consists of spiders. They have two body regions(the cephalothorax and the abdomen). They also have fangs with venom glands, most of them make webs and have poor eye sight but compensate with special eyes that do the same as eyes. Acari is the mite species. They only have one noticeable body region. When the mites are babies, most of them are microscopic and some are close to it. Opiliones are like the daddy long legs: they are common, some of them are predators, most are harmless and commonly encountered. Scorpiones is the scorpion order. They are venomous, they have long tails ending in a stinger and they are the nocturnal predators of some animals. The Phylum Arthropoda (Task 12) Slide 4 Connor Wright

5. Chilipoda Chillipoda’s common species is the centipede. They have many body segments and one pair of legs per body segment. They also have one pair of antennae. Their1st pair of legs are modified so that they are venomous fangs. Centipedes are predators. An Australian centipede. Diplopoda Diplopoda’s common species is the millipede. The millipede has many body segments. It has two pairs of legs per body segment and one pair of antennae. A millipede in some leaf litter. The Phylum Arthropoda (Task 12) Slide 5 Connor Wright

6. Crustacea Crustacea is commonly made up of crayfish, shrimps and crabs. They have several body regions- the head, thorax and abdomen. The number of legs they have varies. They have two pairs of antennae. A giant lobster. Epiclass Hexipoda Organisms that are apart of the Epiclass Hexipoda are special types of insects. There is a certain type of criteria that establishes whether they are a true insect or whether they are apart of Epiclass Hexipoda. They have three distinct head regions: thorax, head and abdomen. They must have one pair of antennae, one pair of mandibles and one pair of Maxilla (two bones that are fused together along the fissure that forms the upper jaw). They also must have three pairs of legs on the thorax and a system composed of tubes that have holes that admit air through the body. The Phylum Arthropoda (Task 12) Slide 6 Connor Wright

7. Entognatha Entognatha means the insect’s mouth is retracted into it’s head. There are three orders in the class sub-phylum Entognatha: Protura, Collembola and Diplura. Protura are apart of the apertygota sub-class. An insect that is wingless, small and agile is apart of the apertygota sub-class. Insects that are apart of Protura don’t metamorphosis. They have no eyes, no antennae. Adults don’t have wings but their young (nymphs) do. They are detrivores. This means that they eat decomposing plant matter and faeces, like earthworms. Collembola, like Protura, is apart of the apertygota sub-class. They don’t metamorphosis. Insects that are apart of the Collembola order have fork-like springing bodies, simple eyes and antennae. Adults don’t have wings but their young(nymphs) do. They are also detrivores Diplura, like Protura and Collembola, is apart of the apertygota sub-class. They don’t metamorphosis. They have compound eyes and antennae. Adults don’t have wings but their young (nymphs) do. There is a difference in size between the nymphs and the adults. Like Protura and Entognatha, insects in Diplura are detrivores. An example of a detrivore. The Phylum Arthropoda (Task 12) Slide 7 Connor Wright

8. Insecta All insects in Insecta have a exoskeleton, a thorax, head and abdomen, three pairs of jointed legs, compound eyes and one pair of antennae. They are one of the most diverse animal groups in the world with there being over a million of the species which makes up half of all known organisms. A grasshopper. This insect is apart of the Insecta class. The Phylum Arthropoda (Task 12) Slide 8 Connor Wright

9. What characteristics do scientists use to classify the classes in Arthropoda? • Scientists use the following information to determine which class in Arthropoda an organism belongs to. They base it on: • Body shape and how the organismworks • Size • Evolution history • Diet • Similarities between organisms • Habitat • Species it is in • Whether it metamorphosis or not The Phylum Arthropoda (Task 12) Slide 9 Connor Wright