Meiosis in Coprinus Atramentarius

Meiosis in Coprinus atramentarius Fries was studied by the use of an acetocarmine squash technique. Discrete chromosomes were noted only during meta-phase–anaphase of the first meiotic division. The diploid chromosome number was determined as six. During the second meiotic division chromatin masses, rather than discrete chromosomes, were seen to separate. In both meiosis I and II, centrosomes were formed at the poles of the division figures.