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A study of these extant members and the cycad fossil record dating back to over 250 million years ago has revealed that cycads have remained relatively unchanged throughout their long history
France in 1987
and Parachimarrhis) by Piero G
with a large majority of species belonging to one of the largest moss groups in the world: the Hypnales
The Pyrenomycetes Described by J.B. Ellis. Mem (79) books A study of these extantThe pyrenomycetes described by J. B. Ellis. Mem. New York Bot. Gard. 79: 1 137. The listing that makes up the bulk of the present study contains nearly 1,500 entries, including 5 generic names, either described by Ellis, often with colleagues, or transferred by him from earlier generic dispositions. Approximately two thirds of the taxa have been studied by subsequent workers. The number of names is nearly equally divided between accepted species,
