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Fig. 1 | BMC Evolutionary Biology

Fig. 1

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. 1

Hemiholosticha kahli nov. spec. in vivo (a, d–k) and after protargol impregnation (b, c). a Ventral view of a representative individual, arrowheads show the algae. b, c Ventral (b) and dorsal (c) views of a representative specimen, showing ciliature and nuclear apparatus, arrowheads show the postoral cirri, hatched lines show cirri originating from the same cirral anlage. d–g Ventral views of representative individuals, showing the contractile vacuole, arrowheads in (d–f) indicate the long posterior dorsal bristles, arrowheads in (g) show the macronuclear nodules, arrow in (e) shows the distinctly curved paroral membrane, arrows in (f, g) show the green algae, double arrowheads show the food discharged from the food vacuole in (f). h Dorsal view, showing the dorsal ribs (arrowheads). i, j Ventral views of a slightly squeezed specimen, showing the distinctly curved paroral membrane (arrow), macronuclear nodules and the granules. k Details of the green algae, arrowheads indicate the red eyespots. AZM, adoral zone of membranelles; CV, contractile vacuole; EM, endoral membrane; FV, food vacuole; LM, left marginal row; Ma, macronuclear nodules; Mi, micronucleus; PM, paroral membrane; RM, right marginal row; R1–3, ventral rows; 1–3, dorsal kineties. Scale bars: 25 μm

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