Ancestral taxa
Domain: Eukaryota  [Taxonomy; edit]
Kài: Plantae  [Taxonomy; edit]
Superdivision: Polysporangiomorpha  [Taxonomy; edit]
Division: incertae sedis  [Taxonomy; edit]
Form taxon: Cooksonioidea  [Taxonomy; edit]
Sio̍k: Aarabia  [Taxonomy; edit]

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Parent: Cooksonioidea [Taxonomy; edit]
Rank: genus (displays as Sio̍k)
Link: Aarabia
Extinct: yes
Always displayed: yes (major rank)
Taxonomic references: Boyce, C.K. (2008). "How green was Cooksonia? The importance of size in understanding the early evolution of physiology in the vascular plant lineage". Paleobiology. 34: 179. doi:10.1666/0094-8373(2008)034[0179:HGWCTI]2.0.CO;2. ISSN 0094-8373. 
Parent's taxonomic references: Boyce, C.K. (2008). "How green was Cooksonia? The importance of size in understanding the early evolution of physiology in the vascular plant lineage". Paleobiology. 34: 179. doi:10.1666/0094-8373(2008)034[0179:HGWCTI]2.0.CO;2. ISSN 0094-8373.