found: Work cat.: Verdcourt, B. Marattiaceae, 1999.
found: Integrated Taxonomic Information System online database, 23 Apr. 2003(order Marattiales, class Filicopsida, division Pteridophyta)
found: NatureServe Explorer WWW site, 23 Apr. 2003:data search (order Marattiales)
found: Webster 3rd, June 20, 2003(Order of lower ferns (class Flicopsida) comprising the Marattiaceae)
found: ITIS, Nov. 15, 2023(Marattiales. Kingdom: Plantae. Taxonomic rank: Order. Synonym(s): Christenseniales. Subclass Marattiidae, Class Polypodiopsida -- leptosporangiate ferns)
found: NCBI taxonomy browser, Nov. 15, 2023(Marattiales. Rank: order. Lineage: cellular organisms; superkingdom Eukaryota; kingdom Viridiplantae; phylum Streptophyta; subphylum Streptophytina; clade Embryophyta; clade Tracheophyta; clade Euphyllophyta; class Polypodiopsida, subclass Marattiidae)