Phylum Mollusca “head-foot”

Phylum Mollusca “soft body” For Example…. Clams Oysters Nautilus Snails, slugs Octopus Squid

Phylum Mollusca “soft body” Basic Characteristics Bilateral Symmetry Open Circulatory System Herbivores, Carnivores, Filter-feeders, Scavengers, or Parasites Aquatic and Terrestrial Movement: Motile (very diverse ways, even jet propulsion!) Reproduction: Sexual (often external fertilization) No Asexual reproduction

Phylum Mollusca “soft body” Special Adaptations Gastropods shell-less or single-shelled mollusks, use muscular foot to move ex: slugs, snails Respire through diffusion Bivalves: Have two shells held together by muscles Ex: clams, oysters, mussels Respire with gills Cephalopods Squids, Octopi, and Chambered Nautiluses Show very intelligent, learned behaviors- most neurologically advanced of the phylum Feet with suckers

Phylum Mollusca “soft body” The Good And the Bad Large food source for humans and other animals Live symbiotically with other organisms Some are filter feeders, decomposers Used in scientific research

Mollusca Anatomy

Phylum Echinodermata “spiny skin” For Example…. Sea Cucumbers Sea Urchins Brittle Star Sea Stars Sand dollars

Phylum Echinodermata “spiny skin” Basic Characteristics Radial Symmetry No brain Carnivores and scavengers Marine Motile Water Vascular System (tube feet) Reproduction: Sexual (external fertilization)

Phylum Echinodermata “spiny skin” Special Adaptations Spiny skin Internal skeleton(endoskeleton) Water vascular system Tube feet (suction), used to pry open clams, oysters

Water Vascular System

External Anatomy

Sea Star Internal Anatomy

Phylum Echinodermata “spiny skin” The Good And the Bad Important in predator of urchins, clams Bio-indicators of marine life Crown-of-thorns, destroyed extensive areas of coral, especially the Great Barrier Reef

Phylum Arthropoda “ jointed appendages ”

Phylum Arthropoda “jointed appendages” For Example…. Crustaceans Crabs Lobsters Shrimp Crayfish Barnacles Spiders Horseshoe crabs Tarantulas Ticks Scorpions Insects Centipedes Millipedes Beetles Flies Wasps

Phylum Arthropoda “jointed legs” Basic Characteristics Bilateral Symmetry Herbivores, carnivores, and omnivores Aquatic and Terrestrial, VERY diverse habitats Motile, using well-developed groups of muscles Segmented body(3,2) (head,thorax,abdomen) (cephalothorax,abdomen) Sexual Reproduction (internal and external fertilization) Exoskeleton made of chitin Open Circulatory System Mostly Dioecious

Phylum Arthropoda “jointed appendages” Special Adaptations Exoskeleton of chitin, must molt to grow larger, size limiting Jointed appendages Respiration: tracheal tubes, spiracles, book lungs Can taste and smell with mouthparts, antennae & legs Heightened sense of hearing and detecting movement Specialized mouthparts for eating almost anything Many can fly-have spread everywhere!

Major Classes of Arthropods Merostomata- horseshoe crabs Pycnogonida- sea spiders Arachnida- spiders, scorpions, ticks, mites Chilopoda- centipedes Diplopoda- millipedes Insecta- butterflies, bees, beatles, flys Crustacea (sub-phylum)- crayfish, lobsters

Crayfish External Structures

Crayfish Internal Anatomy

Using your TEXT find the function of the following- Put them in your notes. Antenna Antennule Antennule Gland (Green) Stomach Digestive Gland Swimmerett Pericardium Uropod Telson Rostrum Chiloped Carapace

*Legs are always attached to thorax Basic insect internal structure HEAD THORAXABDOMEN ANTENNA

Phylum Arthropoda “jointed appendages” The Good And the Bad Many insects cause damage Termites, Lice Mosquitos(spread disease, malaria) Locusts Many Insects contribute to life Pollinate plants Produce products useful to humans- honey, wax, silk Sometimes we eat them!

METAMORPHOSIS- most arthropods will do one of these processes Complete Metamorphosis Incomplete Metamorphosis Adult Eggs Larva Pupa Adult Immature Nymph

Common Idaho Arthropods

Caddis fly Life Cycle

Stone fly Life Cycle

Mayfly Life cycle