FIGURE 6 in The dorsal plate is a critical feature in the reassessment of the rotiferan genus Ptygura (Monogononta; Gnesiotrocha; Flosculariidae)

FIGURE 6. Transmission Electron Microscope images of the dorsal plate. Inset: Light photomicrograph of a sub-sagittal section of a specimen of Limnias ceratophylli in its tube stained with blue toluidine. A: TEM image of the inset white line square area showing the inwards fold of the dorsal plate and the transition from the dorsal plate integument to the body one. The dark grey perimetral band is the intracellular lamina (ICL) of the integument. In this image the transition zone has been obliquely sectioned (circles in the ICL of this zone are pores), so the ICL thickness appeared enlarged here with the two types of glycocalyx overlapping. B: Transition from the dorsal plate to the body integument in transversal section. The transition is not progressive, but abrupt. See text for details. Symbols: b, body integument; v, vesicules at the base of pores; c, cisterns; cc, corona ciliature; dp, dorsal plate; if, inwards fold of the dorsal plate; p, pores; ph, pharynx; t, tube; tr, trophi; sy, syncytial integument. Bars: 2 µm for A, B, and 50 µm for inset.