Phylum Arthropoda Mrs. Howard’s Life Science

Arthropoda - Characteristics Arthropods are a diverse group characterized by: n An Exoskeleton n Jointed appendages n A segmented body n Includes Insects, Spiders, Crustaceans, Centipedes & Millipedes

Phylum Arthropoda n Arthropods are believed to have evolved from Annelids (segmented worms) n Trilobites found in fossil record 540 Million Years Ago n 1st animals to colonize land!

Phylum Arthropoda Subphylum Chelicerata n Body in two parts, no antennae. n Class Merostomata (Horseshoe Crabs) Class Merostomata n Class Arachnida (Spiders, Mite, Scorpions e.t.c.) Class Arachnida n Class Pycnogonida Class Pycnogonida (Sea Spiders)

Phylum Arthropoda My roommate in college had a pet tarantula similar to this named “Peter”:

Phylum Arthropoda Subphylum Uniramia/Myriapoda n Segmented body - classified by how many pairs of appendages per body segment n Class Diplopoda (Millipedes)Diplopoda n Class Chilopoda (Centipedes)Chilopoda (Centipedes)

Phylum Arthropoda Subphylum Uniramia n Body in three parts, thorax in three segments. n Class Insecta (Insects) Class Entognatha (wingless insects) Viceroy butterflyMonarch butterfly

Phylum Arthropoda Subphylum Crustacea n Body in three parts, thorax in eight segments n Class Cirripeda/Maxillopoda (Barnacles) n Class Branchiopoda (Small primitive animals with gills on their feet i.e. Brine Shrimp) n Class Malacostraca (75% of all Crustaceans, Crabs, Lobsters & Shrimp)

Phylum Arthropoda Subphylum Crustacea - Classification

Phylum Arthropoda Brain Pop Video on Insects: Youtube Video on Madagascar Hissing Cockroach - I had to raise one for a couple of weeks in college:

Phylum Arthropoda/Class Insecta Incomplete Metamorphosis Grasshopper Incomplete Metamorphosis has 3 Stages Egg Nymph Adult grasshoppers, cockroaches, termites, praying mantises, crickets, and lice.

Phylum Arthropoda/Class Insecta Complete Metamorphosis Marbled white butterfly Complete Metamorphosis has 4 Stages Egg Larva Pupa Adult Winged insects including:

Phylum Arthropoda Metamorphosis in Insects Metamorphosis Worksheet Solutions on following slide

Graphic Organizer - Crustaceans Body Description - Most are Bilateral Protection – Hard exoskeleton, claws, 2 pair antennae Food – Filter feeders, Scavengers, predatory, use thoracic legs (mouthparts) to “chew” food Habitat – most live underwater Locomotion – Swimming, walking, burrowing, many have a tailfan, muscles Special Characteristics – Exoskeleton molts for growth, Central Nervous System (CNS), Digestive system, Gills, Single chambered heart Examples – Crabs, lobsters, shrimp, barnacles, crayfish

Graphic Organizer -Arachnids Body Description - Bilateral Protection – Exoskeleton, mouthparts, venom Food – Most eat liquid food so they inject or squirt digestive chemicals Habitat – Land or aquatic Locomotion – Muscles, move 1 st & 3 rd leg on one side and 2 nd & 4 th on other side, wind, silk threads Special Characteristics – Exoskeleton molting, 2 body sections cephalothorax and abdomen, CNS, Digestive tract, Single chambered heart Examples – Spiders, mites, ticks, scorpions

Graphic Organizer -Insects Body Description - Bilateral Protection – Exoskeleton Food – Various plants, decaying matter, animals Habitat – Everywhere!!! Most abundant animal on the planet Locomotion – Flying, walking, crawling Special Characteristics – Exoskeleton molting, 3 body sections, head, thorax, abdomen, digestive tract Examples – Complete metamorphosis – Butterflies, beetles, bees Incomplete metamorphosis – Grasshoppers, cockroaches, dragonflies

Graphic Organizer -Millipedes Body Description - Bilateral Protection – Exoskeleton, curl into a coil shape Food – Most are detritivores (decaying matter), piercing mouthparts Habitat – All continents except Antarctica Locomotion – 2 pairs of legs per body segment Special Characteristics – Exoskeleton molting, produce defensive chemicals, incomplete metamorphosis

Graphic Organizer -Centipedes Body Description - Bilateral Protection – Exoskeleton, very quick movement, biting, fangs venom Food – Most are carnivores but a few eat plants Habitat – Everywhere (forest, savanah, prairie, desert etc) Locomotion – 1 pair of legs per body segment Special Characteristics – Exoskeleton molting, front legs act as fangs, incomplete metamorphosis