Fig. 3 Trichodina unionis after dry silver nitrate (A) and protargol (B–E) impregnation. A, B Overviews of the aboral side, showing the structure of the adhesive disc and aboral ciliary wreath. C Detail of the fine structure of the aboral ciliary wreath. D Overview of the adoral side, showing the oral ciliary pattern and macronucleus. E Detail of the oral ciliary pattern. BM, border membrane; F, oral fibers; G, central granules; GK, germinative kinety; HK, haplokinety; IR, inner ring; MA, macronucleus; MR, middle ring; OR, outer ring; P1–3, peniculus 1–3; PK, polykinety; PP, peripheral pins; RP, ridial pins. Scale bars = 5 μm (C), 10 μm (E), 30 μm (A, B, D)

Published as part of Zhang, Tengyue, Rurik, Ivan & Vďačný, Peter, 2023, A holistic approach to inventory the diversity of mobilid ciliates (Protista: Ciliophora: Peritrichia), pp. 425-454 in Organisms Diversity & Evolution (New York, N.Y.) 23 (3) on page 431, DOI: 10.1007/s13127-022-00601-8, http://zenodo.org/record/13188311