Clevelandella sidi sp.nov.

(Figs 14, 15; Supporting Information, Table S12)

Description based on population from a single SRU host individual from Cambodia: Medium-sized, spade-shaped Clevelandella, size in vivo 126–154 × 50–64 µm, usually about 142 × 59 µm, in protargol preparations 95–142 × 37–59 µm, usually about 117 × 46; cell dorsoventrally flattened, prominent notch between left lobe and peristomial projection; peristomial projection about 28% of cell length, peristomial overture extends to about three-quarters of peristomial projection (Fig. 15A, C). Macronucleus broad inverted teardrop-shaped (Figs 14A, B, 15A–C), in anterior half of cell, narrow end at right cell margin, micronucleus ellipsoidal (usually about 4.5 × 2.7 µm), adjacent to macronucleus (Fig. 15G); karyophore usually undetectable or inconspicuous in both live, protargol-impregnated cells, located at posterior end of macronucleus (visible in 3 of 15 protargol-impregnated cells) (Fig. 15F). Swims lazily. Somatic ciliature composed of about 80–90 somatic ciliary rows in Clevelandellidae pattern, about 20–25 ciliary rows extend on to peristomial projection; cilia restricted to approximately anterior half of cell. Sutural kinetofragments absent. Adoral zone usually extends about one-half of body length, composed of an average of 52 membranelles, base of membranelles longest in posterior one-third of adoral zone. POM entirely diplostichomonad (Fig. 15H).

Occurrence: Clevelandella sidi was obtained only from one wild-born SRU subadult female. Later, another wild-born female from the same family group and four of her offspring were dissected, but none of them contained C. sidi .