Classification
(master taxon) [(master rank)]Protoctista [kingdom]
Ciliophora [phylum]
Oligotrichea [class]
Oligotrichia [subclass]
Oligotrichida [order]
Strobilidiina [suborder]
Strobilidiidae [family]
Pelagostrobilidium [genus]
Pelagostrobilidium spirale [species]