Abstract
When the Crouan brothers (1857, 1858) discovered the operculum at the top of the ascus, they placed all species with this structure in the genus Ascobolus Persoon ex Hooker. Boudier (1879, 1885) was the first to recognize the importance of the operculate mode of ascus dehiscence for the classification of the discomy-cetes. Accordingly, he divided the cup fungi on the basis of this character into two groups: the Operculatae and the Inoperculatae. It is a notable fact that none of Boudier’s contemporaries (e.g., Quélet, Karsten, Fuckel, De Notaris, Schroeter, Saccardo, Rehm, Cooke, Phillips, Lindau) accepted this division. It became accepted only much later by Gäumann (1926), Seaver (1927, 1928), Nannfeldt (1932), and Le Gal (1947, 1953). A subdivision of the cup fungi based on the mode of ascus dehiscence is now accepted by most mycologists.
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van Brummelen, J. (1981). The Operculate Ascus and Allied Forms. In: Reynolds, D.R. (eds) Ascomycete Systematics. Springer Series in Microbiology. Springer, New York, NY. https://doi.org/10.1007/978-1-4612-5844-5_3
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DOI: https://doi.org/10.1007/978-1-4612-5844-5_3
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