Body inverted pyriform or conical in shape entirely without a lorica and rounded not flattened in cross-section. Borne upon a non-rigid stalk. Capitate tentacles are arranged in 2 to 4 fascicles, all on the anterior surface. Macronucleus rounded. Ciliated larva produced by simple endogenous budding. Most easily confused with Acineta and Acinetides, the former being flattened and both being loricate.
Quote; Colin R. Curds "British and other freshwater ciliated protozoa Part I Ciliophora: Kinetofragminophora" Cambridge University Press, 1982 (ref. ID; 2013)