Centrioles, another enigma for science

http://www.evolutionnews.org/2008/05/an_evolutionary_origin_of_the006309.html

http://www.pnas.org/content/early/2008/05/02/0802293105.abstract

The evolutionary origin of centriole/kinetosomes, centrosomes, and other microtubule organizing centers (MTOCs), whether by direct filiation or symbiogenesis, has been controversial for >50 years.