.

Characteristics:Soft bodiesHard ShellsLive on land or in waterhave a circulatory system and a complex nervous system.Important food source for humans

Vampire squidgrass squid bobtail squid

Cuttlefish have an internal shell the cuttlebone, large W-shaped pupils, and eight arms and two tentacles furnished with denticulated suckers, with which they secure their prey.

OCTOPUSES

Bivalves2 shells hinged together

clams, oysters,

scallops and mussels

Class Gastropoda-snails and slugs-may have 1 shell-stomach-footed - move on stomach

NUDIBRANCH

chitons

LIMPETS

Phylum Echinodermata

(Spiny-skinned animals)Characteristics:

Hard, spiny skinnedLive in salt waterRadial symmetryWith endoskeleton

Examples of living echinoderm classesAsteroidea

- Starfish or Sea Stars

Crinoidea - Feather Stars

Ophiuroidea - Brittle Stars

Echinoidea- Sea Urchins and Sand Dollars

Holothuroidea - Sea Cucumbers

Class Echinoidea(sand dollars & sea urchins)

Sand Dollar.mp4

Class Holothuroidea Sea Cucumber

Class Asteroidea(starfish or sea star)

04/13/23 PHYLUM ECHINODERMATA 30

Class Crinoidea(crinoids or “sea lilies”)

Diagram illustrating the major body parts of a crinoid.

Feather star. Fossil of a prehistoric stalked crinoid.

Crinoidal limestone, consis-ting mainly of crinoid

columnals.

Reconstruction of crinoids growing on the seafloor

during the Mississippian.

Class Ophiuroidea(brittle stars)

Green brittle star (Ophiarachna incrassata)

Fossil brittle star (Palaeocoma egertoni) from

the Jurassic of England

A Middle Ordovician Cystaster edrioasteroid.

Most common brittle star in the worldOphiactis savignyi

Sea cucumber (holothuroidea)

starfish

Phylum Arthropoda(joint-legged animals)

Characteristics:Body divided into sections/segmentsExoskeleton Jointed legswell developed nervous systemlargest group of organisms on earth

crab

lobster

METAMOr

Tarantula

Brown Recluse Spider

Class Maxilopoda: Subclass Copepoda - Stalkless Barnacle

ectoparasite

Class Insectawith antennae3 pairs of legs3 body regions - head, thorax & abdomen

The six include mandibles for cutting through the host's skin. They are blade-like tips which are enclosed within the proboscis and are protruded to its tip only when the mosquito requires a blood meal. Only then are they protruded through the outer tube to make a sharp surgical incision. Mosquito MandibleThen there is the labrum-epipharynx which during the act of biting, becomes a complete tube called the food canal through which blood is drawn. Whenever the mosquito bites, its saliva is transferred to the wound through the hypopharynx.

WINGS

Class ChilopodaCentipedes are usually terrestrial carnivores Have 1 pair of antennaeI pair of leg per segment Often poisonous, using modified front claws to immobilize prey

Class DiplopodaMillipedes segmented animalsHave 2 pairs of legs per segment Primarily herbivores & decomposers

Characteristics:Bilateral symmetry.With segmented bodies, which include segmented muscles.

With a well–developed coelom.With hollow nerve cord that usually ends with a brain.

With post anal tail at some point in their life.  

With pharyngeal or gill slits at some points in their life.  Have ventral heart, with blood vessels and a closed circulatory system With complete digestive system, meaning that they have a different anus and mouth.With endoskeleton made out of either bone or cartilage.

5 Classes

Class AmphibiaWith bony endoskeletons, usually four legs

Require water at some stage of life cycle

Skin serves as respiratory organ Ex . Frogs, salamanders, caecilians

Class AvesWith feathers, horny beaks, scaly legs and they are egg-laying

With wings for flight and with lightweight bones

Ex. Ducks, doves, chicken

Classes of fish Jawless fishes with eel –like body

with no paired finsJawed fishes (ex. Cartilaginous

fishes or placoderms) with bony elements and pairs of fins.

Bony fishes( 96% of living species) Ex. Tuna, goldfish, eel, etc.

Class Reptiliawith scaly skin which is resistant to drying

With copulatory organ and produce amniotic eggs

Ex. crocodiles, turtles, snakes, lizard, tuataras.

Class Reptilia

Class Mammalia2 Egg-laying ex. Platypus, EchidnaBigger brainsWith mammary glands to nourish their young

Covered with hair except the whales

Has specialized teeth

Class Mammalia

Mammals

Mammals

Cats