Trichodina, EHRENBERG, 1830

Semprucci, Barbara Mikac Federica, Guidi, Loretta, Ponti, Massimo, Abbiati, Marco, Balsamo, Maria & Dovgal, Igor, 2020, Newly discovered associations between peritrich ciliates (Ciliophora: Peritrichia) and scale polychaetes (Annelida: Polynoidae and Sigalionidae) with a review of polychaete-peritrich epibiosis, Zoological Journal of the Linnean Society 188, pp. 939-953 : 950

TRICHODINA TEREBELLIDIS PRECHT, 1935

T e r e b e l l i d e s s t r o e m i i S a r s, 1 8 3 5 (F a m. Trichobranchidae ) – on the branchiae; Bay of Kiel, Germany, Baltic Sea ( Precht, 1935).

UNCLASSIFIED PERITRICHOUS CILIATES

Polydora neocaeca Wiliams & Radaskevsky, 1999 (Fam. Spionidae ) – on the hoods of the bidentate hooded hooks; State of Rhode Island, North America, north-western Atlantic Ocean (Wiliams & Radaskevsky, 1999).

Ampharete santillani Parapar, Kongsrud, Kongshavn, Alvestad, Aneiros & Moreira, 2017 (Fam. Ampharetidae ) – on the abdominal uncini, the branchial surface, the dorsolateral area behind the branchial surface and the ciliated buttons over the abdominal neuropodia; Galicia, north-western Spain and off Morocco, north-eastern Atlantic Ocean ( Parapar et al., 2018).

ANALYSES OF THE POLYCHAETE–PERITRICH CILIATE ASSOCIATION

Forty taxa (30 determined to species level) of peritrich ciliates belonging to 12 genera and seven families are up to date recorded as epibionts of polychaetes. Most of them belong to the order Sessilida , while only five taxa belong to the order Mobilida . The most diverse are representatives of the genus Cothurnia (11 taxa, of which ten determined to species level). Forty-eight polychaete taxa (39 determined up to species level) are known as hosts for peritrich ciliate epibionts. They belong to the families Ampharetidae , Arenicolidae , Capitellidae , Flabelligeridae , Nephtyidae , Nereididae , Nerillidae , Onuphidae , Orbiniidae , Pectinariidae , Phyllodocidae , Polynoidae , Serpulidae , Sigalionidae , Spionidae , Syllidae , Terebellidae and Trichobranchidae . Most polychaete basibionts pertain to the family Syllidae (11 taxa, of which eight determined to species level).