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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Acropisthium

Acropisthium Perty, 1852 (ref. ID; 2013)

Class Kinetofragminophora: Subclass Gymnostomata: Order Haptorida: Family Didiniidae (ref. ID; 2013)

Synonym Dinophrya Butschli, 1889 (ref. ID; 3540), Siagonophorus Eberhard, 1858 (ref. ID; 3540)

[ref. ID; 2013]
Body shape ovoid to cylindrical, with pointed posterior region and short anterior snout-like process. Oral aperture apical on domed snout, cytopharynx armed with trichites. There is a ciliary band around the shoulder where the snout joins the body which is composed of about 20 short rows of cilia. The body behind the ciliary band is uniformly ciliated by about 20 longitudinal kineties which are usually well spaced, however the anterior half of three of the kineties are closely packed and these bear short clavate bristles representing the dorsal brush. Macronucleus spherical in posterior half body. Contractile vacuole posterior. Single-species genus.
Quote; Colin R. Curds "British and other freshwater ciliated protozoa Part I Ciliophora: Kinetofragminophora" Cambridge University Press, 1982 (ref. ID; 2013)
  1. Acropisthium mutabile Perty, 1852 (ref. ID; 1219, 1619, 3540) reported year? (ref. ID; 3698) reported author and year? (ref. ID; 191)
    Syn; Dinophrya lieberkuhni Butschli, 1889 (ref. ID; 3540); Dinophrya cylindrica Rimsky-Korsakow, 1897 (ref. ID; 3540); Siagonophorus euglenoides Eberhard, 1858 (ref. ID; 3540); Siagonophorus loricatus Eberhard, 1862 (ref. ID; 3540); Strombidium acuminatum Stokes, 1891 (ref. ID; 1619, 3540)