Kaszab Zoltán (szerk.): A Magyar Természettudományi Múzeum évkönyve 63. (Budapest 1971)
Gönczöl, J.: Aquatic Hyphomycetes from the Mts. Börzsöny
Heliseus lugdunensis SACC. & THERRY (Table I, Figs. 11-13) I found its conidia in every month; a rather frequent species. Its ratio was especially high in April (25%), May (12%), and July (20%). As to the comparative collections, the conidia occurred in about equal proportions at the upper and lower reaches of the brook. Jaeulispora subraersa HUDSON & INGOLD (Table I, Fig. 26; Plate III, 1) Similarly to the Culicidospora species, one of the rarest aquatic Hyphomycetes in the w r orld. Its general distribution is: Jamaica (HUDSON & INGOLD, 1960), Czechoslovakia (MARVANOVA & MARVAN, 1963), and North America (CRANE, 1968). On some occasions (January, February, March), I observed in my samples a conidium of somewhat uncertain shape, slightly attenuating at one end. In one or two specimens also an obscure appendage seemed to be present. However, in the sample collected on 19 April, I found 4—5 whole conidia, agreeing in every detail with the form discovered by MARVANOVA & MARVAN (the same sample contained also the whole conidia of the Culicidospora species). The length of the conidium was 45—48 \x, of which 16—20 u, referred to the elongately attenuating, spiniform termination at the apical end. The three lateral bristles, also arising from the apex were again 16—20 u. long, and 1.5—3 u, thick. The maximum thickness of the conidium was 8—9.6 p, its basal portion rounded. The conidia were filled by a very dense, granular substance. Later, in September, I again found two specimens, inthe hardly recognizable winter shape. Lemonniera aquatiea DE WILD. (Table I, Fig. 20) A rather frequent species, rich in variety of form, but never found in masses. MARVANOVA & MARVAN (1963) found it in the same frequency, while NILSSON (1964) considers it one of the commonest, widest ranging aquatic Hyphomycete, especially in European countries. The species was the most frequent in the winter samples, in January, February, and March (6—10%). Beginning with April, it became very scarce in the lower reach of the brook, but the proportion of presence gradually increased upstream. Comparative studies found it definitely more frequent in the upper reach, present in the winter quantities even in June and August. The very short (12—15 u.), thick-branched, squat form was rather frequent in the winter samples; also the pentacladous form appeared regularly. Tetrachaetum elegáns INGOLD (Table II, Fig. 15) I found this species for the first time in June, then in August, on both occasions in the middle reach of the brook. Only one or two mature specimens occurred in the June material, but it was more frequent in the August sample. In this latter material, at least an equal amount of apparently developmental stages besides the mature conidia was found.
