Mouth cone and introvert diagram. Diagram of mouth cone (gray area) and introvert in Zelinkaderes yong sp. nov., showing the distribution of outer oral styles, scalids, and trichoscalids. The table shows scalid arrangement by sector. Not all introvert sectors could be examined, but assuming that the species displays the usual symmetry patterns, the scalid distributions for the non-examined sectors have been predicted. Scalid numbers and distributions based on predictions are marked with gray; numbers and distributions based on actual observations are marked with black.