Kaszab Zoltán (szerk.): A Magyar Természettudományi Múzeum évkönyve 63. (Budapest 1971)
Gönczöl, J.: Aquatic Hyphomycetes from the Mts. Börzsöny
Tricladium angulation INGOLD (Table II, Figs. 3—4 Every sample contained its conidia in the lower reach. This was the third frequentest species after Alatospora acuminata and Tetracladium marehalianum in a part of the year, yielding 15—35% of all conidia from September till March, sinking to 3—10% only from April till August. It becomes rarer upstream, and no conidia were found at Sampling site II. Tricladium splendens INGOLD (Table II, Fig. 5; Plate I. 1-2) This species was very rare in the lower reach during the whole year. It occurred about as frequently and as many times as T. angulatum from the upper reaches of the brook. It was comparatively frequent only in December —April, but at no higher proportions than 0.4—0.6%. It was relatively more frequent along the upper reach of the stream, occurring in every sample from April till November, occasionally representing 4—-15% of all conidia. The frequency of the two species (T. angulatum and T. splendens) appears to be inverted to that found by NILSSON (1964) in Sweden. Triscelophorus monosporus INGOLD (Table II, Fig. 4) I found some specimens exclusively in the lower reach of the brook, first in July, and then in the succeeding months. An apparently very rare species. Summary Twenty species belonging to sixteen genera of the aquatic Hyphomycetes were observed during one year in the Morgó brook of the Mts. Börzsöny. It could be established that the vegetational period of the aquatic Hyphomycetes is continuous for the whole year —with only their frequency undergoing changes —since their spores can always be found in the foam, their natural site of accumulation. Quantitative examinations were also made for seasonal frequency and distribution of some species along the various reaches of the brook. Of the twenty species, the following ones were found for the first time in Hungary: Actinospora megalospora INGOLD, Anguillospora crassa INGOLD, Articulospora tetracladia INGOLD, Clavariopsis aquatica DE WILD., Clavatospora stellata (INGOLD & Cox) S. NILSSON, Clavatospora tentacula (UMPHLETT) S. NILSSON, Culicidospora sp., Dactylella aquatica (INGOLD) RANZONI, Jaculispora submersa HUDSON SC INGOLD, Tetrachaetum elegáns INGOLD, Tricladium splendens INGOLD. Finally, I am obliged and thankful to Professor Dr. J. BÁNHEGYI, Chair of Microbiology, L. Eötvös University of Sciences, Budapest, and to Dr. S. TÓTH, Botanical Chair, Agricultural University, Gödöllő, for their invaluable help and advices, as well as to Zs. BUNKE, for the fine and careful execution of the illustrative material.
