Fig. 11.38. Parataeniella armadillidii. A. Nonsporulating thallus. B. Binucleate secondary infestation sporangiospores each produced single in a basipetal series of sporangia. C. Thallus converted into one sporangium bearing uninucleate primary infestation sporangiospores. D. Thallus with mixed spore types: apically it produced a series of secondary sporangiospores, and the basal portion has become a sporangium containing primary spores. Scale bar = 20 µm. Reprinted by permission from Mycologia, vol. 61: 164, Copyright 1969, R.W. Lichtwardt and The New York Botanical Garden.