Some Ultrastructural Features of the Planktonic Freshwater Ciliate Limnostrombidium viride (Alveolata, Ciliophora, Oligotrichida) and Improved Diagnoses of Oligotrich Taxa Author Bardele, Christian F. Author Stockmann, Nicole Author Agatha, Sabine text Acta Protozoologica 2018 57 3 169 193 http://dx.doi.org/10.4467/16890027ap.18.014.10090 journal article 10.4467/16890027AP.18.014.10090 1689-0027 PMC6546604 31168162 12637482 Family Pelagostrombidiidae Agatha, 2004 Improved diagnosis. Oligotrichida with collar and buccal membranelles and endoral membrane. Somatic cilia and ventral kinety might secondarily be absent ( Pelagostrombidium ). Nuclear apparatus comprises one macronucleus and one micronucleus. Stomatogenesis in neoformation organelle. Freshwater.