エピスティリス属　Epistylis

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Contributors of these images 1; Epistylis rotans, 2; Epistylis microdiscum (x 400), 3; Epistylis hentscheli (x 400),

亜綱：細胞は３部分からなる。 1）口部域（oral）； peristome は明瞭で、周囲に dikinetid fileとoral polykinetid がある。 polykinetidは細胞口（cytostome）があるoral cavity（ infundibulum）から出ている。 2）aboral；suction-disc（scopula） を形成するkinetosomes、もしくは、固着性の種では stalkを分泌する。 3）telotroch band；mobile speciesでは常に繊毛があるが、固着性の種では mobileな時期にのみある。
口部域は伸縮することもできる。いくつかの種ではロリカを形成する。

目：亜綱と同じ。

科：成熟trophontは固着性。細胞体は短い。Ｃ字型の大核。大半はロリカをもたない。 peristomal discにstalkがつかないが，stalkはある。 stalkには収縮性がない。単独もいれば群体もいる。 stalkのないものはロリカ内にいる。

属：群体生活。口部の繊毛列が peristomal discの周囲を回るのは３回以下。 scopulaは遊泳細胞の中央部にある。

E. cambari	Peristome 50 μm; common on gills of crayfish (How to know the protozoa, 1979).
E. chrysemidis	230-250 μm long; extra collar around peristome when expanded; cytopharynx large, deep; stalk branches dichotomously lacking myonemes; fresh water (How to know the protozoa, 1979).
E. hentscheli 　Kahl, 1935	Cell body trumpet-shaped, slightly curved; 108-234 μm long, 36-79 μm wide; peristome 50-94 μm wide; peristomal disc extends forward with slope; pellicle striated; macronucleus horseshoe-shaped (Kojima, et al., 1995).
E. lacustris 　Imhoff, 1884	Cell body cylindroid; 50-75 μm long, 20-35 μm wide; pellicle striated; peristomal disc mounded; cytopharynx 1/2 of cell body; macronucleus C-shaped; stalk branches dichotomously with longitudinal fine striation (Zensei-Doubutu Zukan, 1981).
E. microdiscum 　Stiller, 1963	Cell body ovoid, 45-55 μm long, 30-35 μm wide; pellicle slightly striated; peristomal disc like mound; cytopharynx straight 1/4 of cell length; contractile vacuole near peristome; macronucleus C-shaped (Zensei-Doubutu Zukan, 1981).
E. niagarae	Up to 180 μm long; on western painted turtle (How to know the protozoa, 1979).
E. rotans 　Svec, 1897	cell body 70-100 μm long, 22-30 μm wide; peristome 32-40 μm wide; pellicle striated; a contractile vacuole anterior; stalk branching with segments (Kojima et al., 1995).
E. urceolata	160 μm long; common on larvae of Chironomus (How to know the protozoa, 1979).

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Species (synonyms)

1. Epistylis anastatica Linneaus, 1767
2. Epistylis articulata Fromentel, 1874
3. Epistylis autumnalis Stokes, 1889
4. Epistylis balanorum Mereschkowski, 1877
5. Epistylis balatonica Stiller, 1931
6. Epistylis barbata Gourret, 1886
7. Epistylis bimarginata Nenninger
8. Epistylis branchiophila Perty-Stein, 1859
9. Epistylis breviramosa Stiller, 1931
10. Epistylis cambari Kellicott, 1885
11. Epistylis chrysemidis Bishop & Jahn
12. Epistylis constricta Kellicott, 1855
13. Epistylis coronata Nusch
14. Epistylis crassicollis Stein, 1867
15. Epistylis d'udekemi (Epistylis grandis D'Udekem, 1864)
16. Epistylis daphniae Faure-Fremiet, 1905
17. Epistylis diaptomi Faure-Fremiet, 1905
18. Epistylis digitalis Ehrenberg, 1838
19. Epistylis elongata Stokes, 1889
20. Epistylis epibioticum Banina, 1983
21. Epistylis fluitans Faure-Fremiet, 1924
22. Epistylis fugitans Kellicott, 1884
23. Epistylis galea Ehrenberg, 1835(?)
24. Epistylis geleii Stiller, 1931
25. Epistylis harpacticola Kahl, 1933
26. Epistylis hentscheli Kahl
27. Epistylis horizontalis Chatton
28. Epistylis humilis Kellicott, 1887
29. Epistylis invaginata Claparede & Lachmann, 1858
30. Epistylis jaworowskii (Epistylis pyriformis Jaworowski, 1893)
31. Epistylis lacustris Imhoff, 1884
32. Epistylis longicaudatum Banina, 1983
33. Epistylis microdiscum Stiller, 1963 (Epistylis ovum Kent, 1881)
34. Epistylis niagarae Kellicott, 1883
35. Epistylis nympharum Engelmann, 1862
36. Epistylis ophidioidea Kellicott, 1884
37. Epistylis ophrydiiformis Nusslin, 1884
38. Epistylis perrieri Faure-Fremiet, 1907
39. Epistylis plicatilis Ehrenberg, 1838
40. Epistylis polenici Matthes, 1955
41. Epistylis polenici var. saprobicum Banina
42. Epistylis pyriformis D'Udekem, 1862
43. Epistylis rotans Svec, 1897 (Epistylis procumbens Zacharias, 1897)
44. Epistylis rotatorium
45. Epistylis stilleri (Epistylis anastatica Stiller, 1859)
46. Epistylis tubificis D'Udekem, 1864
47. Epistylis umbilicata Claparede & Lachmann, 1858
48. Epistylis uroceolata Stiller, 1933
49. Epistylis variabilis
50. Epistylis vermicola Kahl, 1933
51. Epistylis vestita Stokes, 1887
52. Epistylis violacea Monard, 1918
53. Epistylis vittata Stokes, 1889
54. Epistylis zschokkei (Keiser, 1921)

References

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3. Corliss, J.O., 1979, The Ciliated Protozoa - Characterization, Classification and Guide to the Literature, 2nd, Pergamon Press.

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