Described as a fossil fern (originally Ficites subgen. Hymenopteris). Skog (1986, 1990) reassigns the type ... [details]
Taxonomic and nomenclatural history is complex, refer Skog, 1990 and Taylor et al., 2009. Taxon created for a ... [details]
Based on material originally allocated to the fossil fern genus Onychiopsis, later to the new genus Tanydorus, a ... [details]