Hastatella Erlanger, 1890 (ref. ID; 2014)
Class Oligohymenophora: Subclass Peritricha: Order Peritrichida: Suborder Sessilina (ref. ID; 2014)

[ref. ID; 2014]
Inverted bell-shaped body with peristomial disc held forward when swimming. Cilia on peristome wind anticlockwise around the apical region. Aboral end without stalk, suckers etc. but with a spine. Body covered with 2 to 4 rings of long conical ectoplasmic processes. Most easily mistaken for Astylozoon which does not possess ectoplasmic processes.
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)

Hastatella aesculacantha Jarocki & Jacubowska, 1927 (ref. ID; 1620) reported year? (ref. ID; 1618)
Description; In stagnant water. (ref. ID; 1618)
Measurements; 30-52 by 24-40 um. (ref. ID; 1618)