Fenestraria and Cyphostemma, are forms of what mutual items?
Fenestraria Fenestraria (known as babies' toes or window plant) is a (possibly monotypic) genus of succulent plants in the family Aizoaceae, native to the Namaqualand in Namibia.
Cenarchaeum In taxonomy, Cenarchaeum is a genus of the Cenarchaeaceae. The marine archaean "Cenarchaeum symbiosum" lives within (it is an endosymbiont of) the sponge "Axinella mexicana".