Trichodina lepomi, Yuryshynets & Ondračková & Kvach & Masson, 2019

Yuryshynets, Volodymyr, Ondračková, Markéta, Kvach, Yuriy & Masson, Gérard, 2019, Trichodinid Ectoparasites (Ciliophora: Peritrichia) of Non-native Pumpkinseed (Lepomis gibbosus) in Europe, Acta Protozoologica 58 (2), pp. 69-79 : 73

Trichodina lepomi n. sp. ( Figs. 3A, B, C, D, E)

Body: medium-large trichodinid, disc shaped, size 40.2–55.0 (48.3±3.7, 27)

Adhesive disc: 31.6–43.3 (38.4±2.9, 35)

Border membrane: 3.6–5.6 (4.8±0.5, 27)

Denticle ring: diameter 17.5–28.0 (23.2±2.5, 35); external diameter of denticle ring 29.1–41.1 (35.7±3.1, 35).

Centre of adhesive disc: texture identical to rest of adhesive disc, diameter of central area 6.4–12.6 (9.9±1.6).

Number of denticles: 21–27 (24, 25).

Number of radial pins per denticle: 7–9 (8, 25).

Dimensions of denticle: Length 5.3–6.9 (5.9±0.4, 75), blade 4.6–6.6 (5.6±0.4, 75), ray 4.5–7.1 (5.7±0.6, 75), width of central part 1.4–2.2 (1.8±0.2, 75), length of central part 2.4–3.4 (3.1±0.3, 75), span 10.6–14.8 (12.9±0.9, 75).

Adoral spiral: 370–400° (Fig. 5 E).

Denticle morphology. Blade broad, distal surface flat, parallel to border membrane or slightly slant. Tangent point on the same level or slightly lower than distal margin. Anterior and posterior margins forming extend- ed curves. No prominent apex. Blade extends to and sometimes beyond Y+1 axis. Blade apophysis present but not clearly distinguishable. Posterior margin forming shallow, flat curve. Deepest point situated on lower third of curve. Connection between blade and central part delicate. Central part robust, extending near than halfway to Y-1 axis. Central part above X axis similar to part below X axis. Point of central part rounded, closely associated with following denticle. Ray connection short and broad. Rays mostly straight, parallel to Y-axis or slightly directed anteriorly, thickened in base and tapers gradually to a blunt point. Ratio between denticle above and denticle below X-axis close to one (0.99±0.09).