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Dorsal view of the infraciliature of Metopus palaeformis (Kahl,1927) contracted by fixation and compressed to display details.Synonyms probably include Tesnospira alba (Jankowski,1964),M. hyalinus (Kahl,19270 and M. tenuis (Kahl,1927) among others.Morphology is highly variable probably explaining the large number of synonyms. The cell is flask-shaped (as in this example)to elongate .The anterior end is twisted to the left resulting in a rounded lip that overhangs the peristome.The spiral peristome is bordered on the left by an adoral zone of membranelles and on the right by five closely spaced kineties,the "perizonal stripe"(visible here).The right somatic kineties parallel the peristome anteriorly and the left somatic kineties terminate at the margin of the peristome.Collected from the bottom sediments of an organically enriched rain pool with abundant decaying grass contaminated by Canada goose (Branta canadensis) droppings.Boise, Idaho. January 2006.Stained by the silver carbonate technique (see Foissner, W. Europ. J. Protistol., 27:313-330;1991).Brightfield.
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Dorsal infraciliature of the infraciliature of Metopus palaeformis (Kahl, 1927).The cell shape is well preserved in this Bouin's-fixed specimen compared with the distorted cell shape seen in formalin-fixed specimens impregnated with silver carbonate.Non-flooded Petri dish culture of soil from a park lawn Boise, Idaho. January 2007.Stained by the Wilbert Protargol technique (see Foissner, W. Europ. J. Protistol., 27:313-330;1991).Brightfield.
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Ventral infraciliature of the infraciliature of Metopus palaeformis (Kahl, 1927).The cell shape is well preserved in this Bouin's-fixed specimen compared with the distorted cell shape seen in formalin-fixed specimens impregnated with silver carbonate.Non-flooded Petri dish culture of soil from a park lawn Boise, Idaho. January 2007.Stained by the Wilbert Protargol technique (see Foissner, W. Europ. J. Protistol., 27:313-330;1991).Brightfield.
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Metopus fuscus (Kahl,1927).Brightfield, condenser closed.
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Metopus fuscus (Kahl,1927). DIC.
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Metopus fuscus (Kahl, 1927). Brightfield, condenser closed.
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Metopus fuscus (Kahl,1927). Stained by the silver carbonate technique (see Foissner, W. Europ. J. Protistol., 27:313-330;1991).Brightfield.
