Clevelandella parapanesthiae (Kidder, 1937)

(Figs 28, 29; Supporting Information, Tables S35–S40) Four populations (ASS, PGW, PAC, and MP) were morphologically characterized by both in vivo observations and in protargol preparations and two (PT and STH) only in vivo. The ciliate was moderately to highly abundant.

Description based on ASS, PGW, PAC, and MP populations: Medium-sized Clevelandella (on average 99 × 55 µm in vivo, range 66–119 × 31–71 µm; on average 86 × 46 µm in protargol preparations, range 70–114 × 33–56 µm). Spade-shaped with distinct left notch and protrusive left lobe; peristomial projection short, broad, about 24% of body length. Macronucleus from slender inverted teardrop-shape (Fig. 28A, G, H) to scimitar-like (Fig. 28C, E, F), obliquely oriented, situated right of midline, posterior end extends into posterior part of body proper, karyophore at posterior end of macronucleus, visible only inconsistently in vivo and in protargol preparations. In MP population cells with S-like (Fig. 28B) macronucleus (as well as normal teardrop-shaped) were observed. Micronucleus ellipsoidal, inconspicuous. Somatic cilia limited to approximately anterior 67% of cell. About 10 obliquely oriented, free right sutural kinetofragments in the right suture (Fig. 28D). Adoral zone extends about 56% of cell length on average, composed of an average of 38 membranelles (range 35–42). POM diplostichomonad only in anterior quarter (Fig. 28F).