In recent papers on ferns and allied plants, several new species names were published invalidly or illegitimately, because they had been used previously or because their type specimens were designated ambiguously. The International Code of Nomenclature for algae, fungi, and plants (Shenzhen version) was revised to remedy these situations and to apply correct names for the new taxa. Finally, new names are proposed or the correct type specimens are specified, as the case may be.
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