Corrigendum to "Tropidoatractidae fam. nov., a deep branching lineage of Metopida (Armophorea, Ciliophora) found in diverse habitats and possessing prokaryotic symbionts" [Protist 169 (July (3)) (2018) 362-405] - Rotterová, Johana; Bourland, William; Čepička, Ivan (Protist, 2018)