Domain Eucaryota Subdomain Chlorota Doweld (2001) Kingdom Chlorobiota C.Jeffrey ex Doweld (2001) - plants see Subkingdom Viridiplantae Caval.-Sm. (1981) Subkingdom Pteridobiotina Britton & A. Br. (1896) Superphylum Pteridophytanae Doweld (2001) Phylum Pteridophyta Schimp. (1879) see Phylum Filicinophyta Class Hymenophyllopsida Doweld (2001) [monotypic] see Order Cyatheales A.B.Frank (1877) Order Hymenophyllales Link (1833) Family Hymenophyllaceae Mart. (1835) - filmy ferns 1 Genus Hymenophyllum Sm. (1793)