sosphaera pallida.
Isosphaera pallida is a species within the phylum
Planctomycetes. The
Planctomycetes are unique in that while they don't have a true nucleus, typically their DNA is enclosed within a double membrane (though this feature seems to be absent in
Isosphaera.
I. pallida is phototactic*, reproduces by budding, and displays gliding motility. Unlike most eubacteria,
I. pallida (and other
Planctomycetes) lack muramic acid -- a key component of peptidoglycan -- in their cell wall. It is therefore believed that these organisms went on their merry evolutionary way before peptidoglycan was ever heard of.
*
I. pallida moves towards light sources.
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