FIGURE 2. Carodnia vieirai (UFRJ-DG 315M), vertical (2.1-2) and transverse (2.3) sections of a left p1 in reflected light images (RLM). The grounded, etched and sputter coated sections were illuminated almost tangentially from different sides, indicated by the arrows framing the lamps. Areas of similar prisms orientation reflect in the light in the same intensity. The vertical section (2.1) is passing through the tip, whereas (2.2) shows the labial side, about the midpoint. All sections show the difference between the inner and the outer zone. The location of the light bulb in each photography shows where the illumination come from.