Al-Ruwaili 2000. New Silurian acritarchs from the sub-surface of northwestern Saudi Arabia. Al-Hajri, Sai'id; Owens, Bernard[Eds]. Stratigraphic palynology of the Palaeozoic of Saudi Arabia. [GeoArabia Special Publication 1.], Gulf PetroLink, Bahrain, 2000: 1-230. Chapter pagination: 82-91