. Comparative morphology of Fungi. Fungi. EUASCOMYCETES 171 most Gymnoascaceae, it is found on decaying feathers and dung. The cells are multinucleate. As in Gymnoascus setosus and Ctenomyces serratus, they abjoint lateral or terminal, hyaline, oval, multinucleate conidia. The formation of the perithecium takes place as in the Gymnoas- caceae. The copulation branches arise from neighboring cells of the same hyphae or two separate hyphae. From the first, they are multi- nucleate and subsequently undergo several nuclear divisions. The ascogonium is slender and lies as a helix around the spherica
. Comparative morphology of Fungi. Fungi. EUASCOMYCETES 171 most Gymnoascaceae, it is found on decaying feathers and dung. The cells are multinucleate. As in Gymnoascus setosus and Ctenomyces serratus, they abjoint lateral or terminal, hyaline, oval, multinucleate conidia. The formation of the perithecium takes place as in the Gymnoas- caceae. The copulation branches arise from neighboring cells of the same hyphae or two separate hyphae. From the first, they are multi- nucleate and subsequently undergo several nuclear divisions. The ascogonium is slender and lies as a helix around the spherical antheridium (Fig. 106, 1). Fertilization is absent; the male nuclei degenerate; the ascogonium develops parthenogenetically. As in Ctenomyces serratus,. Fig. 106.—Aphanoascus cinnabarinus. 1. Small ascogonium coils about spherical antheridium. 2. Ascogenous hyphae coil about antheridium whose contents are degener- ating. 3. Section of periphery of an immature perithecium. The cells of the ascogenous hyphae are about to develop laterally to asci. 4. Mature fructification. (1 to 3 X 600; 4 X 10; after Dangeard, 1907.) it divides into binucleate cells; some of these grow to ascogenous hyphae which coil helically and form lateral secondary branches which again coil helically. The whole system is abjointed into binucleate cells which apparently form the asci as lateral outgrowths (Fig. 106, 3). Meanwhile the knot is closely surrounded by sheath hyphae intertwining at the periphery into a pseudoparenchymatous wall of several layers. The perithecia are up to 2 mm. in diameter, hyaline at first, becoming yellow- ish brown and finally cinnabar red (Dangeard, 1907). In Aphanoascus the peripheral layers of the rind form a definite pseudoparenchymatous peridium, while in the Gymnoascaceae they form a plectenchymatous tissue; Aphanoascus, thus, has been considered by. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readabili
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