FIGURE 4 in Two new species of the bathyal holothurian genus Pannychia (Elasipodida, Laetmogonidae) from Japanese waters

FIGURE 4. SEM images of wheel ossicles from dorsal body wall of Pannychia nagasakimaruae sp. nov. (A, B, C from holotype, NSMT E-13401; D from a paratype, NSMT E-9443). A, large wheels with triangular rim teeth and calcareous membrane, convex side view (left) and concave side view (right); B, mid-sized wheels with rim teeth but calcareous membrane incompletely covering the nave, convex side view (left) and concave side view (right); C, small wheels without rim teeth and calcareous membrane, regular forms (C1) convex side view (left) and concave side view (right), irregular form (C2); D, a perforated wheel.