Figure 1. Paraspathidium apofuscum n in Three marine haptorid ciliates from northern China: Paraspathidium apofuscum n. sp., Trachelotractus entzi (Kahl, 1927) Foissner, 1997 and Apotrachelotractus variabialis Long, Song and Warren, 2009 (Protozoa, Ciliophora)

Figure 1. Paraspathidium apofuscum n. sp. from live cells (A, G), after protargol (B, D–F), silver nitrate (C), and silver carbonate stainings (H, I). (A) a typical cell; (B) apical view of oral apparatus, arrowheads show the dikinetids in the anterior parts of somatic kineties, arrows indicate the brush kineties; (C) silverline system; (D) extrusomes with different shapes; (E, F) the infraciliature, from the same specimen; (G) half extended cells, arrows indicate extrusomes in the oral area; (H, I) lateral views of the buccal apparatus, arrowheads indicate the circumoral kinety, arrows mark the brush kineties. Notes: BK, brush kineties; CK, circumoral kinety; scale bars: 50 µm (A).