Measurements of morphological traits, maximum length of tentacular crown (A), Collar length (B), Thorax length (C). Redrawn from Martin et al. (2006). (2-3) Hook in lateral and apical view, distance between the tip of shaft and teeth ventral margin (X), distance starting from the hook base to the ventral margin of the teeth ends (Y), distance between the manubrium ventral face and teeth distal dorsal face (Z), dorsal and ventral shift of the teeth (W). L1: tangent from the teeth top edge. L2: tangent from the teeth bottom margin. L3: tangent from the shoulder ventral margin. L4: manubrium direction observed in the ventral position. Redrawn modified from Martin et al. (2006). (4) Median section of a capillary notochaeta indicating the meaning of measures A, B, C, and D taken on scales. A: Distance from the free end until the widest scale part. B: Distance from the widest scale part to where it is completely overlapped by two adjacent scales. C: Longest distance between the ends of two successive scales. D: Maximum scale width at which point A and B intersect. Redrawn from Koh and Bhaud (2003).