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Ebbestad J. O. R., Lefebvre B. (2015): An unusual onychochilid mollusc from the Ordovician (Tremadocian) Fezouata Formation, Morocco, Geobios 48, 427–43
Ebbestad J. O. R., Lefebvre B. (2015): An unusual onychochilid mollusc from the Ordovician (Tremadocian) Fezouata Formation, Morocco, Geobios 48, 427–43