Silica-scaled flagellates (Synurophyceae) of the „Mestecanisu de la Reci”, Covasna County, Transsylvania, Romania

Silica-scaled flagellates (synurophyceae) of the „Mestecanisu de la Reci” Covasna County, Transylvania, Romania. The „Mestecanisu de la Reci” („Rétyi Nyír”) is an extended sandy area situated in the Brasov Depression, southeast of Transylvania, between the city of Sf. Gheorghe and Covasna town, near the village of Reci (Réty). The peculiar landscape of the region is due to the eolian sand dunes that had been formed at the beginning of Holocene after the Rau Negru („Feketeügy”) river emptied the ancient Quaternary lake basin. Later, due to the raising of ground water level, small pools and bogs have been formed in the hundreds of small depressions formed among the dunes. The present paper deals with the silica-scaled chyrophytes collected during the spring and autumn of 1996 and 1997, from such small pools and bogs, situated mostly in the protected area (Nature Reserve) of the „Mestecanisu de la Reci”. There have been identified 23 taxa: 17 Mallomonas and 6 Synura species. The following taxa have not yet been recorded in the „Mestecanisu de la Reci” : Mallomonas acaroides, M. annulata, M lelymene and Synura lapponica

Silica-scaled chrysophytes from the bog-lake Balata-to, SW Hungary

Twenty-six species of silica-scaled chrysophytes representing the genera Chrysosphaerella (1 species), Mallomonas (19 species) and Synura (6 species) are reported based on transmission electron microscopy from the springtime flora of the slightly acidic bog-lake Balata-to, a Nature Reserve, situated in Southwest Hungary. Ten of them (Mallomonas alata, M. clavus, M. insignis, M. mangofera, M. oviformis, M. papillosa, M. pillula, M. scalaris, M. transsylvanica and Synura multidentata) are new records for Hungary. Furthermore, two species, M. pillula and M. scalaris are for the first time found in the Carpathian Basin and M. alara f. hualvensis is a new record for the flora of Europe. Dispersal problems are discussed

Silica-scaled chrysophytes from permanent and temporary waters of Hortobágy, eastern Hungary

The silica-scaled flagellate flora of permanent (reservoirs, fishponds) and temporary (roadside Caricetum) waters of the Hortobagy National Park, eastern Hungary, was studied based on materials collected in summer 1995 and spring 1996. Altogether, twenty-six taxa were identified in TEM studies: two belong to Chrysophyceae (Chrysosphaerella brevispina, Paraphysomonas vestita) and twenty-four to the Synurophyceae of which eighteen Mallomonas (M. acaroides, M. akrokomos, M. alpina, M. annulata, M. areolata, M. calceolus, M. caudata, M. corymbosa, M. crassisquama, M. cyathellata, M. elongata, M. heterospina, M. intermedia, M. paxillata, M. portae-ferreae, M. punctifera, M. teilingii and M. tonsurata) and six Synura (S. curtispina, S. petersenii var. petersenii, S. petersenii var. glabra, S. spinosa, S. splendida and S. uvella)

Green algal flora of the acidic bog-lake Baláta-tó, SW Hungary

Algal flora in the acidic bog-lake, Balata-to were sampled twice in 1991 and bimonthly in 1995-1997. Balata-to is a Nature Reserve of diluvial origin with interesting and rare higher plant species and associations. Previous algological investigators demonstrated the presence of 177 algal taxa and recognized the uniqueness of its microscopic flora. During our observations 231 taxa were found, 105 of them belonging to Chlorophyta (Volvocales 16, Chlorococcales 46, Desmidiales 41, Ulotrichales 2). The present paper gives a brief survey of the rare and characteristic chlorophytes of the lake