A pretty important piece of evidence on how the first eukaryotes came about. The two big schools of though were previously that symbiosis happened first before

A pretty important piece of evidence on how the first eukaryotes came about. The two big schools of though were previously that symbiosis happened first before they merged or that the bacteria started out as a parasite living inside the archaea before developing symbiosis. The evidence for the later is that the bacterial ancestor of mitochondria seems to have been in the order Rickettsiales which contains the cell parasite that causes Typhus in humans. But seeing a species so similar to the arachea parent of the first eukaryotes in close symbiosis with bacteria seems stronger evidence the other way. It's not quite the classic hydrogen hypothesis[1] symbiosis but it's the similar. [1]https://en.wikipedia.org/wiki/Hydrogen_hypothesis https://en.wikipedia.org/wiki/Hydrogen_hypothesis