Pyxicola Kent, 1881 (ref. ID; 1248) or 1882 (ref. ID; 2014)
Class Oligohymenophora: Subclass Peritricha: Order Peritrichida: Suborder Sessilina (ref. ID; 2014)
Family Vaginicolidae Kent, 1881 (ref. ID; 1248)

Synonym; Caulicola Stokes, 1894 (ref. ID; 2014); Pachytrocha Kent, 1882 (ref. ID; 2014)

[ref. ID; 2014]
Elongate, trumpet-shaped body contained within an erect pseudochitinous lorica and mounted upon a stalk. While the lorica itself is without valves etc., the body bears a discoid operculum beneath the peristome border which seals the aperture when the animal contracts. Strong contraction results in the animal retreating deep into the lorica and the operculum then only covers the peristome region. Trueba reported that the operculum may be lost leaving a fleshy pad.
Quote; Colin R. Curds, Michael A. Gates and David McL. Roberts "British and other freshwater ciliated protozoa Part II Ciliophora: Oligohymenophora and Polyhymenophora" Cambridge University Press, 1983 (ref. ID; 2014)

Pyxicola affinis Kent (ref. ID; 1618)
Description; In marsh water. (ref. ID; 1618)
Measurements; Lorica about 85 um long. (ref. ID; 1618)
Pyxicola socialis (Gruber) (ref. ID; 1618)
Description; Often in groups; salt water. (ref. ID; 1618)
Measurements; Lorica about 100 um long. (ref. ID; 1618)
Caulicola valvata Stokes, 1894 (ref. ID; 1335, 1620) reported year? (ref. ID; 1618)
Description; Stalk about one-half; body protrudes about one-third when extended; brackish water. (ref. ID; 1618)
Measurements; Lorica about 50 um high. (ref. ID; 1618)