Summary
Several monocentric chytrid species of the generaPhlyctochytrium,Rhizidium,Chytridium,Chytriomyces andKarlingia were isolated on various substrata from soils of Oceania. Among these are two new species,Phlyctochytrium megastomum andRhizidium endosporangiatum. The former species is characterized chiefly by sporangia with an usually large apical, subapical, or a lateral exit orifice, the persistence of remnants of the pailla wall at the edge of the exit orifice, and by small zoospores.
Rhizidium endosporangiatum is characterized at first primarily by predominantly spherical sporangia which develop 1 to 8 broad papillae. At maturity these papillae give them an angular shape. The exit papillae deliquesce at the tip, and through them protrude prominent arms of an endosporangium which expands and in which the zoospores usually swarm briefly.
Willoughby's Chytridium parasiticum occurred abundantly as a parasite ofNowakowskiella sp.,Pythium sp., andPhytophthora sp. and developed epibiotic resting spores like those ofChytriomyces. Accordingly, this parasite is transferred to this genus and renamedChytriomyces willoughbyii because the nameparasiticum is preempted by the author's previously describedChytriomyces parasiticus.
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References
Bary, A. de &Woronin, M. 1865. Beitrag zur Kenntniss der Chytridieen. Ber. Verh. Naturf. Ges. Freiburg3: 22–61, pls. 1–2.
Friedmann, I. 1953. Eine neue Chytridiale,Chytritridium surirellae n. sp. Österr. bot. Z.100: 5–7, 1 fig.
Fischer, A., 1892. Phycomycetes. Die Pilze Deutschands, Oesterreichs und der Schweiz. Rabenhorst Kryptogamen-Fl.1(4): 1–490. Leipzig.
Gaertner, A. 1954. Beschreibung dreier neuer Phlyctochytrien und einesRhizophydium (Chytridiales) aus Erdboden. Arch. f. Mikrobiol.21: 112–126, 7 figs.
Haskins, R. H. 1946. New chytridiaceous fungi from Cambridge. Trans. Brit. mycol. Soc.29: 135–140, figs. 1–21.
Johanson, A. E. 1944. An endo-operculate chytridiaceous fungus:Karlingia rosea gen. nov. Amer. J. Bot.31: 397–404, 37 figs.
Karling, J. S. 1944. Brazilian chytrids. II. New species ofRhizidium. Amer. J. Bot.31: 254–261, 72 figs.
Karling, J. S. 1945. Brazilian chytrids. VI.Rhopalophylyctis andChytriomyces, two new chitinophilic operculate genera. Amer. J. Bot.32: 362–369, 61 figs.
Karling, J. S. 1947 a. Brazilian chytrids. X. New species with sunken opercula. Mycologia39: 56–70, 56 figs.
Karling, J. S. 1960. Parasitism among chytrids. II.Chytriomyces verrucosus sp. nov., andPhlyctochytrium synchytrii. Bull. Torrey Bot. Club87: 326–336, figs. 1–29.
Karling, J. S. 1967. Some zoosporic fungi of New Zealand, VII. Additional monocentric eucarpic operaculate species. Sydowia20: 119–128.
Karling, J. S. 1968. Zoosporic fungi of Oceania. III. Monocentric chytrids. Arch. f. Mikrobiol.61: 112–127.
Persiel, I., Scholz, E. &Harder, R. 1966. Chytridiales und einige andere niedere Phycomyceten aus Ozeanien. Arch. f. Mikrobiol.53: 173–177.
Sparrow, F. K. Jr., 1952. Phycomycetes from the Douglas Lake region of northern Michigan. Mycologia44: 759–772, 1 fig.
Sparrow, F. K. Jr., 1960. Aquatic Phycomycetes. XXIII+1187 pp., 91 figs. Univ. Mich. Press, Ann Arbor.
Willoughby, L. G. 1956. Studies on soil chytrids. I.Rhizidium richmondense sp. nov. and its parasites. Trans. Brit. mycol. Soc.39: 125–141, 9 figs.
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This study has been supported by a grant from the National Science Foundation, Washington, D.C.
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Karling, J.S. Zoosporic fungi of Oceania. IV. Additional monocentric chytrids. Mycopathologia et Mycologia Applicata 36, 165–178 (1968). https://doi.org/10.1007/BF02049683
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DOI: https://doi.org/10.1007/BF02049683