L. Hably szerk.: Studia Botanica Hungarica 23. 1992 (Budapest, 1992)
Révay, Ágnes: A new species of Triadelphia from Hungary
STUDIA XXIII. BOTANICA HUNGARICA (Antea: Fragmenta Botanica) 1992 pp. 63-68 A new species of Triadelphia from Hungary By Á.RÉVAY (Received 30 April, 1990) Abstract: A new dematiaceous hyphomycete species, Triadelphia morgóensis is described and illustrated. A key for 12 species of Triadelphia is proposed. During investigations of wood-inhabiting Hyphomycetes in Hungary, black sporodochial structures with 2-septate conidia formed singly on ampulliform cells mixed with some obclavate subhyaline, multiseptate conidia, were observed. In pure culture on cornmeal agar the fungus produced three forms of conidia. Consequently, the culture was considered to belong to the pleomorphic genus Triadelphia Shearer & Crane (1971), which has been emended by CONSTANTINESCU and SAMSON (1982). They distinguished six pleomorphic species and illustrated six (a-f) distinguishable forms of conidia. The three conidial forms found in pure culture represent the type "a", "c" and "e", but they are different in some respect from any described species. Triadelphia morgóensis - sp. n. Plate 1. 1-4; Fig. 1. Mycelium immersum, ex hyphis ramosis, septatis, subhyalinis 2-3 u,m crassis compositum. Cellulae conidiogenae integratae, terminales vei laterales, hyalinae, parietibus crassis, globosae vel ampulliformes, 4.8-5.5 u,m longae 3-4 u,m crassae, gregariae usque caespitosae, structuras sporodochiis similes formantes. Conidia acrogena, solitaria, holoblastica, heteromorpha: 1./ cylindrica, recta vel parum inclinata, 2-septata, crasse tunicata, apice rotundata, basi truncata, cellula apicali et centrali atrobrunnea, cellula basali hyalina vel subhyalina, 16-25.6 x 3.2-4.8 u,m; 2.1 obclavate, subhyalina, 5-7 septata, basi truncata, sursum attenuata, 40-57.6 x 3.2-4 ujn; 3./ allantoidea usque reniformis, hyalina, aseptata, tenuitunicata, levis, 4.8-6.2 x 2-3 ujn. Holotypus: Hungária, montes Börzsöny-hegység, prope pag. Kismaros ad ripam rivuli Morgó-patak, in ligno putrido; 12.IV 1988., leg. A. RÉVAY et J. GÓNCZÖL, (BP 664 Fn.). Colonies slow-growing on cornmeal agar, dark brown to black, densely aggregated sporodochia formed in the 4-6 mm diam central part, surrounded by zones of
