The fine structure of some Thalassiosira species (Bacillariophyceae) in the Danube and the Tisza rivers

Centric diatoms of large rivers and tributaries in Hungary: morphology and biogeographic distribution

“…The species was described by HASLE (1978) from a brackish water locality (Helsinki, Gulf of Finland) and was transferred to the Conticribra genus by STACHURA-SUCHOPLES and WILLIAMS (2009). Additional data were published about its morphology by MAKAROVA et al (1979), KISS et al (1984), GENKAL (1992), TRIGUEROS et al (2000).…”

Invasions of alien species of planktonic microalgae into the fresh waters of Holarctic (Review)

“…The first spe cies originated from lakes of Central Africa (Gasse, 1975;Hasle, 1978), and the second originated from Lake Maracaibo (Venezuela) and rivers of North America (Hasle and Lange, 1989;Kiss et al, 2002). In the 1980s, T. faurii was found in the Kyiv reservoir (Dnieper River), where it was defined as Talassiosira lacustrus (Genkal and Shcherbak, 1987;Genkal et al, 2007), and in the Tisza River, Hungary (Kiss et al, 1984). Recently, both species were also registered in the northeastern part of the Black Sea (close to the Danube region) , and T. faurii was also registered in the Tsymliansk reservoir (Genkal and Golokolenova, 2008);-2008 was found in the Svisloch River (Belarus) (Genkal et al, 2010) and in water bodies of Karelia, but as Thalassiosira bramaputrae var.…”

THE RELATIONSHIP BETWEEN VALVE DIAMETER AND NUMBER OF CENTRAL FULTOPORTULAE IN THALASSIOSIRA WEISSFLOGII (BACILLARIOPHYCEAE)1

“…T o the extent that these clones are representative of those of marine and nonmarine habitats, the differences in y-intercept values between THALA5 and THALA2 suggest that nonmarine specimens of T. weissjogii tend to have fewer central fultoportulae than do marine specimens at a given diameter. Kiss et al (1984) did not recognize the effect of diameter, but otherwise suggested the same hypothesis based on published data on assemblages of T. weissflogii from Europe, North America, and South Africa (Hasle 1961, Lowe and Busch 1975, Belcher and Swale 1977, Fryxell and Hasle 1977, Schoeman and Archibald 1977, Makarova et al 1979.…”

“…'This relationship has not been reported for any other Thalassiosira species. Kiss et al (1984) noted that nonmarine valves of T. weissjogii seem to have fewer central fultoportulae than do marine forms. Thus there may be at least two different components (specimen size and environment of development) underlying variation in central fultoportulae count.…”