Phylum Characteristics and Examples

By: Jose Lozano

Porifera

Characteristics

-no definite symmetry

-body multicellular, few tissues, no organs

-cells and tissues surrounded by a water filled space


Examples

-sponges

Cnidaria

Characteristics

-they are diploblastic

-radially symmetrical

-generally marine, but few species are found in fresh water

-may live in colonies or solitary


Examples

-jelly fish

-sea anemones

-hydra

-corals

-sea pens

-sea pansies

-sea wasps

-sea jellies

Platyhelminthes

Characteristics

-free-living and parasitic unsegmented worms that are dorsroventrally flattened

-spiral cleavage

-complex gut, but still incomplete


Examples

-flatworms

-planaria tapeworms

-turbellarians,

-fluke

-flatworm

Nematoda

Characteristics

-bilaterally symmetrical

-body has more than two cell layers, tissues and organs

-body fluid under high pressure


Examples

-roundworms

-pinworms

-hookworms

Mollusca

Characteristics

-bilaterally symmetrical

-body has more than two cell layers, tissues and organs

-has no true respiratory organs


Examples

-snails

-clams

-oysters

-mussels

-octopuses

-squid

-limpet

-slug

-scuttle-fish

-chitons

Annelida

Characteristics

-bilaterally symmetrical and vermiform

-body has more than two cell layers, tissues, and organs

-has no true respiratory organs


Examples

-common earthworms

-night crawlers

-red wigglers

-leaches

-rag worms

-beard worms

-giant tube worms

-spoon worms

Arthropoda

Characteristics

-bilaterally symmetrical (in most cases)

-body has more than two cell layers, tissues and organs

-body cavity has a true coelom


Examples

-insects

-millipedes

-arachnids

-crustaceans

-spiders

-scorpions

-centipedes

Echinodermata

Characteristics

-possesses 5-rayed symmetry, mostly radial, sometimes bilateral

-body has more than two cell layers, tissues and organs

-body cavity a true coelom


Examples

-father stars

-star fish

-sea urchins

-brittle stars

-sea cucumbers

-sand dollars

-sea lilies

Chordata

Characteristics

-bilaterally symmetrical

-body has more than two cell layers, tissues, and organs

-body cavity a true coelom

-without excretory organs


Examples

-animals that have spinal chords

-giraffes

-deer

-leopards

-humans

5 CLASSES OF VERTEBRATES

Amphibians

Characteristics

-amphibians are ectothermic vertebrates

-skin lacks scales, hair, and feathers, and is neither smooth or rough

-they lay eggs in water

-have 3-chambered hearts

-lack claws on their toes


Examples

-frogs

-toads

-salamanders

-newts

Reptiles

Characteristics

-ectothermic vertebrates

-scales, but no hair or feathers

-they have 3-chambered hearts (except alligators and crocodiles)

-have claws (except for those with no legs)

-first animals, in evolution to develop the amniotic egg



Examples

-snakes

-turtles

-lizards

-reptiles

-cold-blooded

Fish

Characteristics

-ectothermic, aquatic vertebrates

-skin is generally covered with scales

-limbs are modified into fins for swimming

-breathe with gills

-lay eggs that must be in water


Examples

-salmon

-clownfish

-starfish

-cold-blooded

Birds

Characteristics

-endothermic vertebrates

-skin is covered with feathers

-4-chambered hearts

-bones are lightweight and usually hollow

-forelimbs are modified as wings

-they lay eggs


Examples

-jays

-robins

-ducks

-birds

-warm-blooded

Mammals

Characteristics

-endothermic vertebrates

-have hair which varies greatly among species

-most have sweat glands

-have sebaceous (fat-secreting) glands

-have different types of teeth


Examples

-deer

-mice

-opossums

-raccoons

-humans

-warm-blooded

-have hair