Kaszab Zoltán (szerk.): A Magyar Természettudományi Múzeum évkönyve 67. (Budapest 1975)

Tóth, S.: Some new microscopic Fungi, III.

ANNALES HISTORICO-NATTJRALES MUSEI NATIONALIS HTJNGARICI Tomus 67. Budapest 1975. Some New Microscopic Fungi, III. by S. TÓTH, Gödöllő Abstract — Description of Pleosphaerellula fumanae sp. n. and Cordana crassa sp. n. from dry twigs of Fumana procumbens (DUN.) GR. et GODR. and from rotten wood of Fagus süvatica L., respectively. Ceratocystis horanszkyi TÓTH is translocated into the genus Sphaeronaemella. With 4 figures. Pleosphaerellula fumanae sp. n. (Fig. 2) Peritheeia nigra, carbonacea, cca 150—180 ^m diam., plus-minus depresse globosa, in rimis transversalibus corticis ad lignum singillatim vel in seriebus brevibus vel in gregibus laxis disposita, ostiolo vix conspicuo, glabra. Asci pauci, elongatosaccati, pro ratione sat tenuiter tunicati, apice leniter incrassati, sine apparatu speciali apicali, 35—44x10—12,5 u,m, subtus non pedicellati, primarie polyspori, sporis perfecte repleti, paraphysibus initio crassis, simplicibus vel modice ramosis, ascos superantibus, serius deliquescentibus circumvallati. Sporae hyalinae vel parum flavidulae, elongate ellipsoideae, aseptatae, (3—)3,6

—4,5(

—6,2) x X(l,6— )1,9—2,2(—

2,5) iim. Typus: No. 8778. Matrix: Fumana procumbens (DUN.) GR. et GODR., in ramulis emortuis praesertim tenuioribus. Pr. pag. Szigetcsép, insula Csepelsziget fluminis Danuvii, haud procul urbis Budapest, Hungária 9. VI. 1959. leg. S. TÓTH In herbario Sectionis Botanicae, Museum Historico-naturale Hungaricum, Budapest, Hungária. The genus Pleosphaerellula described by N. NAUMOV and N. P. CZEREPANOVA in 1952 and ranged by them within the Mycosphaerellaceae is characterized especially by the stubby, roughly cylindrical asci, having a number (256) of spores. According to these authors, no paraphyses can be found in the peritheeia, as it mentioned by them in the diagnoses of both the genus and the only species. According to my findings from among the peritheeia of the new species in the younger ones I often clearly saw, some well-developed, bulky, thread-like paraphyses which could not be seen in the older peritheeia considered to be fully mature. For the description of the two authors the material of two gatherings served as base. Following similar cases it can be supposed that they only studied well-developed peritheeia on their materials, thus, they could not see the paraphyses, though entire in the not fully ripe peritheeia. The spores of the new species, by means of their size and form, show a welldefinable difference from those of the type species. Their number is primarily great, i.e. they did not proliferate through 8 ascospores. The ostiolum of peritheeia here is also hard-observable. Ann. Hist.-nat. Mus. Nat. Hung., 67, 1975