FIGURE 4 in New species of Thoonchus (Enoplida, Enchelidiidae) from the Yellow Sea and redescription of T. giganticus Belogurova et al., 1986

FIGURE 4. Male of Thoonchus covidus sp. nov. SEM. A. Anterior end, lateral view (buccal cavity armature). B. Anterior end, apical view (cephalic arrangement). C. Anterior end, lateral view (amphid). D. Posterior end, lateral view (precloacal papillae). Abbreviations: a—amphid; cs—cephalic setae; ils—inner labial sensillae; o—right ventrosublateral tooth; ols—outer labial setae; pp—precloacal papillae. Scale bars: A, D—20 µm; B, C—10 µm.