Phylogenetic Tree
Click on image above
to see the Phylogenetic Tree
"What common ancestor does the Zebra spider share
with all other animals?"
Zebra spiders, along with all
animals, share the common ancestor, Choanoflagellates. Most
choanoflagellates are sessile protists, some are colonial.
Choanoflagellates are a window on early animal evolution. Both cell
biological and molecular evidence indicate that choanoflagellates
are the closest living relatives of multicellular animals.
The genome of the choanoflagellate has been
sequenced, and subsequent analysis has shown that they are closely
related to
animals. For
further evidence of the close relationship between
choanoflagellates and the
animals, we see that there are specialized
cells in sponges called choanocytes, which bear a great resemblance
to
choanoflagellates. Choanocytes can also be
found in nematodes.
Click on image above to see
Phylogenetic Tree
"How does the zebra spider fit in with other spiders?"
Jumping
spiders can be divided into three major lineages: The lyssomanines,
the spartaeines
and the largest group of salticids. Thus, they are considered to lie
near the base of the family. The Salticidae are comprised of the
largest spider family,
making up more then 90% of jumping spiders.