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Oligohymenophorea: Hyemnostomatia: Scuticociliatida: Philasterina: Loxocephalidae

Loxocephalus plagius
(Stokes, 1885) Kahl, 1931
Syn. Dexiotricha plagius Stokes, 1885

Loxocephalus Genus: Preoral suture prominent; anterior suture extends to right immediately forward of oral area (Illustrated Guide, 1985). Ovo-cylindroid body, dark colored; no anterior cilia; transverse ring of long cilia near anterior end; cytostome small, near anterior ring of cilia; a long caudal cilium; common in decaying vegetation (How to know the protozoa, 1979). Ovoid to cylindrical; crescentic cytostome on slightly flattened area near anterior end; a zone of cilia around body; one (or more) long caudal cilium; cytoplasm yellowish to dark brown; macronucleus ovoid; a single contractile vacuole; fresh or brackish water (Kudo, 1966).
Species: Cell body 50-65 μm long; nearly cylindrical; 15-16 ciliary rows; cytoplasm usually dark; fresh water among decaying vegetation (Kudo, 1966). Small, ovoid with a blunt anterior and rounded posterior; 50-65 μm long; transverse ciliary bands conspicuous; somatic ciliation uniform; the tuft of caudal cilia reduced (only one ?); spherical macronucleus; a single contractile vacuole central (Carey, 1992).

Loxocephalus plagius, cell body 53 μm long, 23 μm wide, x 400, x 640, Uruguay, November 1999, photo by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640
Loxocephalus Loxocephalus Loxocephalus Loxocephalus

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