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Fig. 5 | BMC Evolutionary Biology

Fig. 5

From: Phylogeny of the ciliate family Psilotrichidae (Protista, Ciliophora), a curious and poorly-known taxon, with notes on two algae-bearing psilotrichids from Guam, USA

Fig. 5

Hemiholosticha kahli nov. spec. (after protargol impregnation, a; in the scanning electron microscope, c) and Psilotrichides hawaiiensis, Guam population (after protargol impregnation, b; in the scanning electron microscope, d). a Ventral view showing proximal portion of polystichomonad paroral membrane with short extra row of basal bodies (white arrow), the midportion of the paroral which appears narrower due to torsion of the membrane as it follows the curve of the buccal opening (black arrow), the distal end of the paroral (black arrowhead), and the posterior cirrus of row 1 (cf. Figure 1b). b Ventral view showing the single file of basal bodies comprising the stichomonad paroral membrane (black arrows) and stichomonad endoral membrane (black arrowhead). The cilia of the paroral arch over the file of basal bodies from right to left causing the two parallel lines on either side (white arrowheads). c Ventral view showing the distal end of the paroral membrane (black arrow), tips of cilia from four rows of the polystichomonad paroral membrane (1–4), unciliated basal bodies of an adoral membranelle (white arrow), and the second left marginal cirrus (white arrowhead). d Ventral view showing decreasing length of cilia at the distal end of the stichomonad paroral membrane, the distal end of the membrane (white arrow), longer cilia in the midportion of the membrane (black arrow), and cilia of the stichomonad endoral membrane deep in the buccal cavity (white arrowhead). Scale bars: 5 μm

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