External link - related glossary terms
Belén formation: Belenopyge balliviani
El Otfal formation: Ceratarges aries van Viersen & Prescher, 2011
Ahrdorf formation: Ceratarges berolinensis (Richter, 1909)
El Otfal formation: Ceratarges koumalii Viersen & Prescher, 2011
El Otfal formation: Ceratarges ziregensis van Viersen & Prescher, 2011
Jemelle formation: Ohleum magreani Taghon, Bonino & Mottequin, 2012