Vorticella longifilum Kent, 1881

= V. crassicaulis Nenninger, 1948

= V. longifilum f. epizooicum Szczepanowski, 1978

= V. macrocaulis (Stokes, 1885) Noland & Finlay, 1931

= V. simplex Nenninger, 1948

Record as epibiont on ostracods: This species was cited as Vorticella crassicaulis epibiont on abdominal appendages of ostracods from Germany (Nenninger 1948; Morado & Small 1995; Mayén-Estrada & Utz 2018).

Record as epibiont on other hosts: on fresh water isopod Asellus (Asellus) aquaticus (Linnaeus, 1758) (cited as Asellus aquaticus) from Hungary; on amphipods Dikerogammarus haemobaphes (Eichwald, 1841) (cited as Dicerogammarus haemobaphes balatonicus) from Hungary, and on Gammarus tigrinus from the Netherlands (Mayén-Estrada & Utz 2018).