Korshikoviella limnetica Silva 1959

¬ Korshikoviella limnetica (Lemm.) Silva 1959. Fig. 7A–B – Appendix 1 Basionym: Characium limneticum Lemm. 1903 Synonym: Lambertia limnetica (Lemm.) Korš. 1953] Description: Spindle-cylindrical cells, divided into segments, straight, narrowed at both ends and sharply pointed, free-floating. Cells attached to the shells of planktonic crustaceans were not observed in the material. Total cell length 205.9–119.0×6.8–11.6µm, spines 52.0–54.9 µm long. Each cell segment with a chloroplast bearing one pyrenoid. Single spindle-cylindrical segments, 5.6–8.8 µm long, 6.8–11.6 µm wide. Found in site: Few cells of Korshikoviella limnetica (Lemm.) Silva 1959 were recorded only in phytoplankton of peat cut No. 1 and No. 3. In peat cut No. 1, the taxon was found in samples from September 29, 2005. In peat cut waters no. 3, the occurrence of the species was recorded in material from April 30, 2006. Distribution in Poland: From Poland, the species is recorded from plankton, mainly ponds (Krzeczkowska-Wołoszyn, 1977, 1979; Krzeczkowska-Wołoszyn, Kyselowa, 1979; Kyselowa, 1966; Sosnowska, 1957, 1968; Stefko, 1976, and others). General distribution and ecology: Korshikoviella limnetica occurs in temperate and tropical waters. Localities of the species are known from Algeria, Japan, Austria, Sweden, Sierra Leone, South Africa, the Czech Republic, Ukraine, Hungary, and the USA (Komarek, Fott, 1983). The occurrence of this taxon is possible due to the presence of planktonic crustaceans, on whose shell the species develops. Occasionally, the species appears in plankton as free-swimming. Its biology limits the occurrence of typical phytoplankton species in samples. This feature does not allow determining its distribution and therefore it should be assumed that it occurs in scattered locations.