A104 Animal Development
This exciting new poster is the first time the animal
kingdom has ever been shown through the development of
physical characteristics. It graphically demonstrates how
the main branches of the new cladistic classification system
were established. A clade is a group of organisms that share
a common physical characteristic.
Animals differ from other life forms in that they have
at least two cell layers. This characteristic defines the
Metazoa (Animal Kingdom) clade. The next major physical
development was the addition of a third cell layer. All
animals have them, except the primitive sponges and
jellyfish. Thus each of these three groups is a clade.
The poster starts with the simplest animals then progresses
to the most complex, showing all of the important changes A
branching system design presents the nine primary clades,
which are then divided to the next level. Detailed
illustrations show many representative species. All are
identified by captions.
This poster is largely devoted to the invertebrates and
the presentation shows how the various groups are related to
one another. It makes it easy to understand their common
physical characteristics and their differences. The
vertebrates are summarized in the lower right corner. The
complexity of the subject resulted in them being treated
separately in Milestones of Vertebrate Evolution.
The third (triploblasic)
cell layer permitted the development of a more complex body.
This clade is unique in that the animals share a second
common characteristic. They are also bilateral; each half is
the mirror image of the other. Authorities disagree as to
which of the two characteristics should be the defining one.
This has resulted in the clade being referred to by two
different names, Triploblastic and Bilateral. The poster
Lophophotrochoa clade contains the animals that have
trochophore larva. These are arranged into three clade /
phyla - the bryozoa, the brachiopods and the Phoronida.
Three poster Set
Milestones of Evolution
and our new Animal Kingdom poster are designed to be
used both individually and together. Animal Development
focuses on the invertebrates and Milestones of Vertebrate
Evolution picks up where it leaves off. Both show how
the various clades evolved; Animal Kingdom show the
results. Teachers, students and professionals will find them
to be an invaluable reference.
All are listed on the menu at left.
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All posters are 24" x 36"
printed on heavy paper and
coated to reduce glare
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for permanence and protection.
No frame needed.