Spirotrichea:
Stichotrichida: Oxytrichidae
Histriculus
(Sterki, 1878) Corliss, 1960
Family: Frontoventral cirri scattered on forward, mid- and rear areas of ventrum.
Genus: Oral cavity not wide; 2 oval macronuclei; marginal cirri confluent at rear;
frontventral cirri not linear; body firm, not laterally flexible (Illustrated Guide, 1985).
a large AZM at least 1/2 body length; caudal & transverse cirri present;
two ovoid macronuclei (Carey, 1992).
Species:
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Similar Genus -> > Stylonychia;
Oxytricha
Histriculus sp., starved cells, AZM large,
cell body μm long, μm wide,
marginal cirri confluent at rear ??, transverse cirri present, but no caudal cirri ?,
x 400, Japan, 199? by Y. Tsukii
50 μm
100 μm
150 μm; x 400
Histriculus sp., well-fed cells, x 400, by Y. Tsukii
Histriculus sp., "dog eats dog", x 200 & x 400, by Y. Tsukii
50 μm
100 μm
150 μm; x 400
Histriculus sp., double-stained with azure C and fastgreen, x 400, by Y. Tsukii
Histriculus sp., a cyst, x 400, by Y. Tsukii
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