Download Animal Classification

Animal Classification
Phylum
Species Diversity
Internal Features
Body Cavity Features
(e.g. Type of organ systems or lack of, vertebrate, ….
Rotifera
1500+
Porifera
8000 +
Lack organs, nervous system, and anything that could be
called a tissue, sac body plan
Cnidaria
11 000+
Well defined tissues, no organs, sac body plan
Platyhelminthes
Flatworms
20 000+
lack a coelom, and have the sac body plan
80 000 – 1 million
a tube-within-a-tube body plan and a body cavity. The
body cavity is a pseudocoelom, or a cavity
incompletely lined with mesoderm. This fluid-filled
pseudocoelom provides space for the development of
organs, and serves as a type of skeleton.
well-developed coelom is partitioned by membranous
septa, developed specialized parts
Nematoda
Roundworms
External Features
Examples
Outer layer features (skin, scales,
hair, appendages)
Cilia on head used for feeding, large
muscular pharynx, foot with stick
toes
Body
Symmetry
Bilateral
Movement
Habitats
Cilia
Freshwater and
some marine
Bdelloids
Body wall perforated by pores
through which water enters, has
spicules – needle like internal
structure
Two basic body forms, umbrella
shaped and free swimming
cylindrical
asymmetrical
Don’t move
Mainly Marine
Sponges
Radial
pulsating bell,
somersault or use
tentacles as legs
Mainly Marine
Jellyfish, Sea
Anemones, Corals
Unsegmented bodies, mouth but no
anus, hooks and suckers for
attachment to host, body resists
digestive juices of host
Unsegmented
Bilateral
Some parasitic &
needs a host,
others in fresh
and salt water
Parasitic, Soil,
others in fresh
and salt water
Tapeworms, Flukes
Segmented body with chaetae
(bristles)
Bilateral
appendages
Soil and Moist
Areas, Fresh and
Salt Water
Earthworms, leeches,
tubeworms
Bilateral
Hookworms, Stomach
worms
Annelida
15 000+
Mollusca
110 000+
have a true coelom, defined organs
Soft bodied and unsegmented
Body consists of head, muscular
foot, and visceral mass (organs)
Most have
bilateral
symmetry
Foot
Marine and
freshwater,
moist areas
Squid, Scallop, Clams,
Snails
Arthropoda
Class
Crustacea
35 000+
open circulatory system, tube within a body plan
Exoskeleton made of chitin,
segmented body, jointed bodies
Bilateral
Walking legs
Mainly marine
but some
freshwater
Shrimp, Crab, Lobster
Phylum
Species Diversity
Internal Features
Body Cavity Features
(e.g. Type of organ systems or lack of, vertebrate, ….
External Features
Examples
Outer layer features (skin, scales,
hair, appendages)
Exoskeleton made of chitin,
segmented body, jointed bodies, 2
body parts, cephalothorax and
abdomen
Body
Symmetry
Bilateral
Movement
Habitats
4 pairs of walking
legs
Almost all
terrestrial
Spider, Tick, Scorpion
Arachnida
57 000+
open circulatory system, tube within a body plan
Insecta
800 000+
open circulatory system, tube within a body plan
Exoskeleton made of chitin,
segmented body, jointed bodies, 3
body parts head, thorax, adbdomen
Bilateral
Wings and legs
Mostly
terrestrial
Bee, Fly, Beetle,
Butterfly, Ants,
Roaches
Myriapoda
2000+
open circulatory system, tube within a body plan
Exoskeleton made of chitin,
segmented body, jointed bodies,
many legs
Bilateral
Many legs
Terrestrial
Millipedes, Centipedes
Echinodermata
6000+
Coelomic fluid, defined organs
Rigid body wall, internal skeleton
made of calcareous plates, many
have spines, unsegmented, no
Radial
symmetry
Tube Feet
Marine
Starfish, Sea Urchin,
Sand dollar
internal skeleton
Chordata/Craniata
Class
Chondrichthyes
(Carilaginous fish)
A dorsal supporting rod called a notochord, dorsal hollow nerve cord, gill clefts (slits), which are seen only during embryological development or on fish
850+
skeletons of cartilage instead of bone, well developed
organ system, most have swim bladders
Fins
Bilateral
Limbs and muscles
Mostly Marine
Shark, Stingray
21 000+
well developed organ system. most have swim
bladders
fins
Bilateral
Limbs and muscles
Fresh and Salt
Water
Eel, Seahorse, Pike
Amphibia
3900+
well developed organ system.
Gas exchange thru their skin and
lungs. Aquatic larvae undergo
metamorphosis to adult
Bilateral
Limbs and muscles
Aquatic and
damp terrestrial
environments
Frog, Toad, Newt
Reptilia
7000+
well developed organ system, cold blooded
Eggs soft leathery shell, scales
Bilateral
Limbs and muscles
Mostly
Terrestrial
Crocodile, Turtle,
Snakes
Aves
8600+
well developed organ system.Fast metabolism, hollow
Eggs hard calcareous shell, strong
light skeleton, presence of feathers
Bilateral
Limbs and muscles
Terrestrial
Penguin, Seagull, Eagle
Osteichthyes
(Bony Fish)
bones
Phylum
Mammalia
Species Diversity
4500+
Internal Features
Body Cavity Features
(e.g. Type of organ systems or lack of, vertebrate, ….
well developed organ system.
External Features
Outer layer features (skin, scales,
hair, appendages)
Hair or fur, mammary glands
produce milk, external ears
Examples
Body
Symmetry
Bilateral
Movement
Habitats
Limbs and muscles
Terrestrial and
Marine
Dolphin, Platypus,
wildebeest, mouse