1887

Abstract

The morphology and infraciliature of two soil ciliates, spec. nov. and Kahl, 1931, collected from Saudi Arabia, were investigated by observations of both living cells and specimens after standard staining methods. differs from its congeners by the combination of the following features: excretory pore quite near posterior end of paroral membrane, 16 or 17 somatic kineties with about 11 kinetids in each one on dorsal side, paroral membrane gently curved and composed of about 15 dikinetids, and hypostomial organelle composed of four or five files of kinetids with four monokinetids each. The diagnosis of was renewed to include characteristics revealed by the silver impregnation method: cells measuring 33–45×18–26 µm, dorsal hump and tail-like podite present, two contractile vacuoles, seven left and five right kineties, 9–11 nematodesmal rods, and dorsal brush containing about 11 basal bodies. Phylogenetic analyses based on small-subunit rRNA gene sequences showed that was closer to species of the Colpodidiidae rather than the Furgasoniidae represented by , and clustered with its congener but was a well-outlined species of the genus.

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2014-07-01
2019-10-21
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