Plagiocampa Schewiakoff, 1892 (ref. ID; 2013) or 1893 (ref. ID; 3540)
Class Kinetofragminophora: Subclass Gymnostomata: Order Prostomatida: Suborder Prorodontina: Family Prorodontidae (ref. ID; 2013)
Prostomatida: Family Plagiocampidae Kahl, 1926 (ref. ID; 7520)

[ref. ID; 2013]
Body shape ovoid to cylindrical. Oral aperture apical, slit-like with a thickened ridge along right edge bearing several long finger-like protoplasmic processes which contain trichocysts. Cytopharynx supported by trichites. Somatic ciliation uniform and complete, kinetosomes paired. Some species with long caudal cilium. Macronucleus oval, centrally located. Single contractile vacuole, posterio-laterally situated.
Quote; Colin R. Curds "British and other freshwater ciliated protozoa Part I Ciliophora: Kinetofragminophora" Cambridge University Press, 1982 (ref. ID; 2013)

Plagiocampa marina Kahl, 1930 (ref. ID; 3540 original paper) reported year? (ref. ID; 1308, 1618, 1619)
Description; Cylindrical; oval macronucleus central; contractile vacuole terminal; a caudal cilium; salt water. (ref. ID; 1618)
Measurements; 55-90 um long. (ref. ID; 1618)