Metaxya

Metaxya
Metaxya rostrata
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Division:	Polypodiophyta
Class:	Polypodiopsida
Order:	Cyatheales
Family:	Metaxyaceae Pic.Serm.
Genus:	Metaxya C.Presl
Type species
Metaxya rostrata (Kunth) C.Presl
Species
See text.
Metaxyaceae distribution
Synonyms
AmphidesmiumSchott 1834 ex Kunze

Metaxya is a neotropical genus of ferns in the order Cyatheales. It is the only genus in the family Metaxyaceae in the Pteridophyte Phylogeny Group classification of 2016 (PPG I). ^[1] Alternatively, the genus may be placed in the subfamily Metaxyoideae of a more broadly defined family Cyatheaceae, ^[2] the family placement used in Plants of the World Online as of November 2019 ^[update] . ^[3]

The species of the genus are characterized by large fronds that approach 8 ft (2.5 m) in length.

Species

As of January 2023 ^[update] , Plants of the World Online accepted the following species: ^[3]

Image	Scientific name	Distribution
	Metaxya contamanensis Tuomisto & G.G.Cárdenas	Peru to Bolivia
	Metaxya elongata Tuomisto & G.G.Cárdenas	Belize, Colombia, Costa Rica, Guatemala, Honduras, Panamá, Venezuela
	Metaxya lanosa A.R.Sm. & Tuomisto	Peru, Venezuela (Amazonas) to Guyana.
	Metaxya rostrata (Kunth) C.Presl	Mexico (Chiapas), Belize, Bolivia, Brazil, Colombia, Costa Rica, Ecuador, French Guiana, Guatemala, Guyana, Honduras, Nicaragua, Panamá, Peru, Suriname, Trinidad-Tobago, Venezuela
	Metaxya scalaris Tuomisto & G.G.Cárdenas	Brazil, French Guiana, Guyana, Suriname, Venezuela

Phylogeny

Phylogeny of Metaxya ^{[4] [5]}

	M. parkeri (Hooker & Greville) Smith M. rostrata (Kunth) Presl M. scalaris Tuomisto & Cárdenas M. lanosa Smith & Tuomisto M. contamanensis Tuomisto & Cárdenas M. elongata Tuomisto & Cárdenas

References

1. PPG I (2016). "A community-derived classification for extant lycophytes and ferns". Journal of Systematics and Evolution. 54 (6): 563–603. doi: 10.1111/jse.12229 . S2CID   39980610.
2. Christenhusz, Maarten J.M. & Chase, Mark W. (2014). "Trends and concepts in fern classification". Annals of Botany. 113 (9): 571–594. doi:10.1093/aob/mct299. PMC   3936591 . PMID   24532607.
3. "Metaxya C.Presl". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2019-11-25.
4. Nitta, Joel H.; Schuettpelz, Eric; Ramírez-Barahona, Santiago; Iwasaki, Wataru; et al. (2022). "An Open and Continuously Updated Fern Tree of Life". Frontiers in Plant Science. 13 909768. doi: 10.3389/fpls.2022.909768 . PMC   9449725 . PMID   36092417.
5. "Tree viewer: interactive visualization of FTOL". FTOL v1.4.0 [GenBank release 253]. 2023. Retrieved 8 March 2023.

External links

• Media related to Metaxya at Wikimedia Commons
• Data related to Metaxya at Wikispecies