Notes on soil ciliates from Singapore, with description of Suturothrix monoarmata nov. gen., nov. spec. (Protozoa, Ciliophora)
Keywords:
Asian soil ciliates, Brazil soil ciliates, Dileptus microstoma, Hemimastix amphikineta, Obliquostomella nom. nov., Ottowphrya magnaAbstract
Few data are available on soil ciliates from Asia. Thus, seven samples were collected in Singapore in February 1987 and investigated between December 1987 and May 1989, using the non-flooded Petri dish method, live observation, and silver impregnation. One hundred and three ciliate taxa, all new for the fauna of Singapore and Malaysia, were found. This applies also to Hemimastix amphikineta, a highly characteristic, euglenid flagellate with Gondwanan distribution. At least three undescribed ciliate species were discovered, viz., Ottowphrya magna, which has been published by Foissner (1993), Dileptus microstoma Vďačný & Foissner (2008), and Suturothrix monoarmata, which is described in the present paper. The new genus Suturothrix belongs to the order Haptorida and is unique in having a heteromorphic dorsal brush consisting of three staggered rows, thus forming a suture with the last right side ciliary row. Suturothrix monoarmata is a slender, middle-sized (~100 x 15 μm) ciliate easily recognizable by the single or two thick extrusomes in the centre of the minute oral bulge. The species is not restricted to Asia but has been found also in soil from the Amazon floodplain, Brazil. The objective homonym Obliquostoma Foissner et al., 2002 is replaced by Obliquostomella nom. nov.
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