Intranstylum invaginatum Stokes, 1886

Record as epibiont on ostracods: It was first reported as epibiont on the ostracod Candona sp. from USA (Stokes 1886). This species was also reported on exoskeleton of unidentified ostracods (Matthes 1950; Morado & Small 1995); epibiont on Cypris sp. from Argentina (Küppers & Claps 2016); on Cypris sp. from Hungary (Stiller 1941, 1971), and on Cypris sp. and Candona sp. from Germany (Kahl 1935).

Record as epibiont on other hosts: This species was reported as epibiont on cladocerans (see Chatterjee et al. 2013): Daphnia sp., Bosmina sp. and Chydorus sphaericus (Müller, 1776)— Germany (Kahl 1935, Matthes 1950); Daphnia magna Straus, 1820, D. atkinsoni Baird, 1859 from Bedford College, England, UK (Green 1974); Daphnia pulex (Linnaeus, 1758) and Chydorus sphaericus —Foulden Common, Norfolk, England, UK (Green 1974); Daphnia magna, D. longispina (Müller, 1776) and Chydorus sphaericus —Tvarminne archipelago, Finland (Green 1957); Scapholeberis mucronata (Müller, 1776)—Lago di Ghirla, Italy (Green 1974). On amphipods Gammarus fossarum Koch, 1836 (cited as Gammarus pulex fossarum) and Gammarus pulex (Linnaeus, 1758) (cited as Gammarus pulex pulex) in Poland (Mayén-Estrada & Utz 2018).