Paramecium - Deutsche Gesellschaft für Protozoologie / German ...

Rare and likely new heterotrophic flagellate species in
plankton of River Danube
Áron Keve Kiss, Éva Ács, Keve Tihamér Kiss
Inst. Ecol. Bot., Hungarian Danube Research Stat. HAS
Samples were collected on 07. Nov. 2007 and 22. Nov 2007 from the
plankton of River Danube, (Hungary). 10 l water was filtered through
a 10 μm mesh size plankton net to 100 ml aliquot and left alone in
laboratory. Microbial succession occurred on aggregates. Heterotrophic
flagellates were investigated daily, for two weeks, in live
samples by video microscopy. Altogether 55 species were found in
two samples. Some species are rarely found, and important supplements
can be given to their descriptions (e.g. Phyllomonas contorta,
with anterior flagellum, now as Ancyromonas contorta; Thaumatomastix
setifera sensu Lauterborn without long spines and scales but
likely with stereocilia). 8 species, found by several specimens, cannot
be assigned to described ones, thus are likely new species (Cercomonas,
Heteromita, Notosolenus, Protaspis, Rhizaspis species). 11
species found by only few specimens are likely new species or genera,
and have to be investigated in further studies. This unexpected
heterotrophic flagellate diversity, and the high proportion of undescribed
morphospecies claim more attention to the investigation of
large rivers, which, as a melting-pot of species maintain huge protistan
diversity.
aronkevekiss@yahoo.co.uk
evaacs@freemail.hu
kis7972@ella.hu
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