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Spirotrichea: Stichotrichida: Sporadotrichina: Oxytrichidae

Stylonychia pustulata
Ehrenberg, 1838

Stylonychia pustulata Family: Frontoventral cirri scattered on forward, mid- and rear areas of ventrum.
Genus: Marginal cirri not confluent at rear; oral cavity wide, expansive; caudal cirri (usually 3) prominent (Illustrated Guide, 1985). Cell body ovoid to elongate, inflexible; large AZM supported anteriorly by a collar; two rows of marginal cirri not confluent posteriorly; strongly-developed frontoventral & transverse cirri present; three long, stiff caudal cilia; dorsal surface ornamented by short rows of cirri; two macronuclei; cyst stage recorded in some species (Carey, 1992).
8 (3 + 2 + 3) frontal, 5 ventral, 5 transverse, 3 caudal cirri.

Species: About 150 μm long (Kudo, 1966). Ovoid; 150 μm long; AZM 1/3 body length; 3 frontoventral, 3 long caudal cirri; two ovoid macronuclei (Carey, 1992).


Stylonychia sp. (pustulata ?), cell body 138-156 μm long, μm wide, AZM about 1/3 body length, x 400, Okinawa Pref., Japan, 199? by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400
Stylonychia Stylonychia Stylonychia Stylonychia Stylonychia
Stylonychia sp., cysts & starved cells 110 μm long, from Okinawa, x 400, by Y. Tsukii
Stylonychia Stylonychia Stylonychia Stylonychia
Stylonychia sp., from Okinawa, a conjugating pair, by Y. Tsukii
Stylonychia Stylonychia


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