Check-lists
* List of countries might not be complete
Links and literature
[1] Lefebvre B., El Hariri K., Lerosey-Aubril R., Servais T., Van Roy P. (2016): The Fezouata Shale (Lower Ordovician, Anti-Atlas, Morocco): A historical review, Palaeogeography, Palaeoclimatology, Palaeoecology 460, 7–23 [as Cavernolites senex]
Lefebvre B., El Hariri K., Lerosey-Aubril R., Servais T., Van Roy P. (2016): The Fezouata Shale (Lower Ordovician, Anti-Atlas, Morocco): A historical review, Palaeogeography, Palaeoclimatology, Palaeoecology 460, 7–23 [as Cavernolites senex]