Macrostomorpha taxonomy and phylogeny

The distal opening is terminal and oblique, facing the concave side of the bow. The walls surrounding the distal opening appear to be very slightly thickened. p. 50

Eyes 8 x 9 micrometer. The distal end of the penis stylet is bent so that the angle between this and the main axis is slightly less than a right-angle. The distal opening is oblique. The walls of the tube are of even thickness. A distinctive notch is present in one of the walls near the proximal opening (D). p. 54

The eyes are small with an irregular shape with dimensions of 8 to 12 micrometer. The penis stylet has its distal end bent at more-or-Iess a right angle to the main tube. This tip constitutes the thickened wall of the tube. The distal opening is situated at the heel of the stylet. p. 51

Die Augen sind sehr klein und stehen im ungequetschten Tiere näher beieinander als dies in SILLIMANS Zeichnung der Fall ist. p. 30