Overviews and details of trunk morphology. Light micrographs showing overviews and details of trunk morphology in Zelinkaderes yong sp. nov., holotypic male (KIN-000818). A. Ventral view of the entire specimen with incomplete midterminal spine. B. Dorsal view of the specimen shown in A. C. Partly everted introvert with scalids and scalid spines. D. Detail of the second trunk segment with cuspidate spines and the barely visible acicular spines. E. Ventral view of the third trunk segment showing the characteristic cuticular ornamentation with a longitudinal striation formed by the cuticular hairs and the pectinate fringe on the posterior border of the segment. Abbreviations: aclv acicular lateroventral spine, crmd10 crenulated middorsal spine on segment 10, cula cuspidate lateral accessory spine, culv cuspidate lateroventral spine, cuvl cuspidate ventrolateral spine, lts lateral terminal spine, md4-9 + 11 acicular middorsal spines on segments 4 to 9 and 11, mts midterminal spine, psc.sp primary spinoscalid spines, sc spinoscalid.