Orthotrochilia sinica
Marine Orthotrochilia with slender elliptical body shape, about 50–60 × 20–25 μm in vivo; 18–21 somatic kineties, two frontoventral kineties; the length of left perioral kinety treble the length of right one; two contractile vacuoles ventrally located on right side; 25–32 nematodesmal rods.
Marine Orthotrochilia with slender elliptical body shape, about 50–60 × 20–25 μm in vivo; 18–21 somatic kineties, two frontoventral kineties; the length of left perioral kinety treble the length of right one; two contractile vacuoles ventrally located on right side; 25–32 nematodesmal rods.
Description: Cell size about 50–60 × 20–25 μm in vivo. Body elliptical in outline with anterior end bluntly rounded and posterior tapered . Dorsal side vaulted with a longitudinal furrow in middle, while ventral side flattened. Cytostome sub-apically located, about 9 μm in width, and surrounded by 25–32 nematodesmal rods. Cytoplasm colourless, containing numerous small, greasily shining granules. Two contractile vacuoles, 4–5 μm in diameter, positioned in anterior and posterior 1/4 of body length, near rig). Podite, about 10 μm long, subcaudally positioned. Single macronucleus ellipsoid, about 25 × 11 μm in vivo, centrally located. Cilia about 10 μm long. Movement by slowly gliding on the substrate.
In total, 18–21 somatic kineties, the two right-most of which are almost equal in length, with both extending anteriorly and bending to the left side; the five right-most kineties terminating posteriorly at the same level, while others are progressively shorten from right to left. Equatorial fragment composed of 3–12 basal bodies, and terminal fragment consisting of 6–11 ones. About 4–6 kinetosome-like dots present near the base of the podite. Oral ciliature typical
of the genus Orthotrochilia: two perioral kineties composed of dikinetids and distinctly separated; the left kinety triple the length of the right one.
Type location. Coastal waters off Xiaogang Port in Qingdao (36°18′N, 120°43′E), China.