Phylum ArthropodaPhylum Arthropoda

Mrs. Howard’s Life ScienceMrs. Howard’s Life Science

Arthropoda - Arthropoda - CharacteristicsCharacteristics

Arthropods are a diverse group characterized by:

An Exoskeleton Jointed appendages A segmented body Includes Insects, Spiders, Crustaceans,

Centipedes & Millipedes

Phylum ArthropodaPhylum Arthropoda

Arthropods are believed to have evolved from Annelids (segmented worms)

Trilobites found in fossil record 540 Million Years Ago

1st animals to colonize land!

Phylum ArthropodaPhylum Arthropoda

Subphylum Chelicerata Body in two parts, no antennae. Class Merostomata (Horseshoe Crabs) Class Arachnida (Spiders, Mite,

Scorpions e.t.c.) Class Pycnogonida

(Sea Spiders)

Phylum ArthropodaPhylum ArthropodaMy roommate in college had a pet

tarantulasimilar to this named “Peter”:

Phylum ArthropodaPhylum Arthropoda

Subphylum Uniramia/Myriapoda Segmented body - classified by how

many pairs of appendages per body segment

Class Diplopoda (Millipedes) Class Chilopoda (Centipedes)

Phylum ArthropodaPhylum Arthropoda

Subphylum Uniramia Body in three parts, thorax in three

segments. Class Insecta (Insects) Class Entognatha (wingless insects)

Viceroy butterfly Monarch butterfly

Phylum ArthropodaPhylum Arthropoda

Subphylum Crustacea Body in three parts, thorax in eight

segments Class Cirripeda/Maxillopoda (Barnacles) Class Branchiopoda (Small primitive

animals with gills on their feet i.e. Brine Shrimp)

Class Malacostraca (75% of all Crustaceans, Crabs, Lobsters & Shrimp)

Phylum ArthropodaPhylum Arthropoda

Subphylum Crustacea - Classification

Phylum ArthropodaPhylum Arthropoda

Brain Pop Video on Insects:https://www.brainpop.com/science/diversityoflife/insects/

Youtube Video on Madagascar Hissing Cockroach - I had to raise one for a couple of weeks in college:https://www.youtube.com/watch?v=W7Efjt6UC1g

Phylum Arthropoda/Class Phylum Arthropoda/Class InsectaInsecta

Incomplete MetamorphosisIncomplete Metamorphosis

Grasshopper

Incomplete Metamorphosis has 3 Stages

•Egg

•Nymph

•Adult

grasshoppers, cockroaches, termites, praying mantises, crickets, and lice.

Phylum Arthropoda/Class Phylum Arthropoda/Class InsectaInsecta

Complete MetamorphosisComplete Metamorphosis

Marbled white butterfly

Complete Metamorphosis has 4 Stages

•Egg

•Larva

•Pupa

•Adult

•Winged insects including:

Phylum ArthropodaPhylum ArthropodaMetamorphosis in InsectsMetamorphosis in Insects

Metamorphosis WorksheetSolutions on following slide

Graphic Organizer - Crustaceans

Body Description - Most are BilateralProtection – Hard exoskeleton, claws, 2 pair antennaeFood – Filter feeders, Scavengers, predatory, use thoracic legs (mouthparts) to “chew” foodHabitat – most live underwaterLocomotion – Swimming, walking, burrowing, many have a tailfan, musclesSpecial 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 - BilateralProtection – Exoskeleton, mouthparts, venomFood – Most eat liquid food so they inject or squirt digestive chemicalsHabitat – Land or aquaticLocomotion – Muscles, move 1st & 3rd leg on one side and 2nd & 4th on other side, wind, silk threadsSpecial Characteristics – Exoskeleton molting, 2 body sections cephalothorax and abdomen, CNS, Digestive tract, Single chambered heart

Examples – Spiders, mites, ticks, scorpions

Graphic Organizer -InsectsBody Description - BilateralProtection – ExoskeletonFood – Various plants, decaying matter, animalsHabitat – Everywhere!!! Most abundant animal on the planetLocomotion – Flying, walking, crawlingSpecial Characteristics – Exoskeleton molting, 3 body sections, head, thorax, abdomen, digestive tract

Examples – Complete metamorphosis – Butterflies, beetles, beesIncomplete metamorphosis – Grasshoppers, cockroaches, dragonflies

Graphic Organizer -Millipedes

Body Description - BilateralProtection – Exoskeleton, curl into a coil shape Food – Most are detritivores (decaying matter), piercing mouthpartsHabitat – All continents except AntarcticaLocomotion – 2 pairs of legs per body segmentSpecial Characteristics – Exoskeleton molting, produce defensive chemicals, incomplete metamorphosis

Graphic Organizer -Centipedes

Body Description - BilateralProtection – Exoskeleton, very quick movement, biting, fangs venomFood – Most are carnivores but a few eat plantsHabitat – Everywhere (forest, savanah, prairie, desert etc)Locomotion – 1 pair of legs per body segmentSpecial Characteristics – Exoskeleton molting, front legs act as fangs, incomplete metamorphosis