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Spirotrichea: Stichotrichia: Stichotrichina: Spirofilidae

 Stichotricha aculeata
Wrzesniowski 1870

Stichotricha Family: Cirral files spiral obliquely around body.
Genus: Slender or ovoid or fusiform; usually 4 spiral rows of crri; sometimes tube-dwelling (Kudo, 1966). Body long with pointed anterior; loricate; posterior of body blunt, round (Illustrated Guide, 1985). S. gracilis posterior end pointed (Carey, 1992).
Species: 100 μm long; with endosymbiotic algae; fresh water (Kahl, 1930).

Stichotricha aculeata Wrzesniowski (or S. socialis Gruber 1880 ?), with endosymbiotic Chlorella-like algae, cell body 135 μm long, 20 μm wide, x 400, x 640, Watarase-yusuichi (Watarase Wetland), Fujioka town, Tochigi Pref., Japan, March 30, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Stichotricha secunda Stichotricha secunda Stichotricha secunda Stichotricha secunda

S. aculeata Wrzesnioski, 1884: Spindle-shaped; posterior end rounded; thin neck; 90 μm long; peristome 1/2 the body length; contractile vacuole anteriorly located; two ovoid macronuclei (Carey, 1992).

* S. secunda Perty: 130-200 μm long; fresh water (Kudo, 1966).

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