Taxonomic Categories There Are 9

Taxonomic Categories

There are 9 animals in nine different Phyla. Be sure to look at every page.

Animal

Phylum

Dichotomous Key (steps)

Classification

Cnidaria

Organism is multicellular

Does it have exo or endo skeleton? NO

Is organism asymmetrical (sponge). NO

Is organism transparent? YES

It is jelly fish.

Kingdom: Animalia

Phylum: Cnidaria

Subphylum: Medusozoa

Mollusca

Does it have endo-skeleton or exo-skeleton? EXO

Does it have Shell? YES.

Does it have foot? YES.

It is a snail

Kingdom: Animalia

Phylum: Mollusca

Gastropoda

Annelida

Does it have any skeleton? NO

Found on land? YES?

Does it have symmetrical smooth body? YES

Does it have a segmented body? YES

It is an earthworm

Kingdom: Animalia

Phylum: Annelida

Subphylum:

Oligochaeta

Arthropoda

Terrestrial or non-terrestrial? TERRESTRIAL

Flies or crawls or walk? FLIES

Has fur and spinal cord? NO

Has antenna? YES

5) Has hind wing? YES

6) it is a butterfly

Kingdom: Animalia

Phylum: Arthropoda

Class: Insecta

Porifera

1) Terrestrial or non-terrestrial? NON-TERRESTRIAL

2) Has endo or exo skeleton? EXO

3) Body symmetrical? NO

4) it is a sponge

Kingdom: Animalia

Subkingdom: Parazoa Phylum: Porifera

Echinodermata

1) Terrestrial or non-terrestrial? NON-TERRESTRIAL

2) Has endo or exo skeleton? EXO

3) Body is symmetrical? YES RADIAL

4) Does it have feet? Yes

5) Body smooth or spiny? SPINY

6) it is a star fish.

Kingdom: Animalia

Phylum: Echinodermata

Subphylum:

Asterozoa

Class: Asteroidea

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Chordata

1) Multicellular hence it is either plant or animal

2) Lacks chlorophyll hence it is animal

3) Has skeleton hence Chordata

4) Has feathers and flies hence it is aves

Kingdom: Animalia

Phylum: Chordata

Class: Aves

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Image Rights: Allen G.

Collins and the UC Museum of Paleontology

Platyhelminthes

1) Does it have a skeleton? NO

2) Is the body symmetrical? YES

3) Is the round or cylinder like? NO

4) Found on land or water? POND WATER

5) Can it see? YES

6) it is a lukeworm

Kingdom: Animalia

Phylum: Platyhelminthes

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Image Rights: Courtesy of University of Minnesota

Nematoda

1) Has skeleton? NO

2) Found on land? YES

3) Body round? YES

4) Body smooth? YES

5) Body is segmented? NO

6) it is a nematoda.

Kingdom: Animalia

Phylum: Nematoda

Part 2: Answer the following questions as they relate to the nine phyla in the assignment table. (Porifera, Cnidaria, Nematoda, Arthropoda, Platyhelminthes, Annelida, Mollusca, Echinodermata, and Chordata.)

1. Which phyla lack organs? What type of symmetry do they have?

Porifera and Cnidaria lack organs. Porifera lack any symmetry hence these are asymmetrical while Cnidaria have radial Symmetry.

2. List all of the phyla that show cephalization.

The phyla that show cephalization are Mollusca, Annelida, Chordata, Platyhelminthes and nematoda.

3. Do all organisms on the table have 3 germ layers (endoderm, ectoderm, and mesoderm)? If not, which phyla have fewer than three germ layers?

No, not all these organisms have 3 germ layers. Porifera has no germ layer and Cnidaria has two of them.

4. One phylum on the table has more species than all the others. State the name of this phylum, and provide several different examples of species found in this phylum.

Maximum number of species is found in Arthropoda. Some species are crustacean, insects and arachnids. For instance butterflies, spiders, beetle, grasshopper, crabs etc.

5. Fish do not all have the same skeletal structure. Describe the differences among fish from the most primitive to more advanced types of fish.