Biology:Leucotrichum
| Leucotrichum | |
|---|---|
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Division: | Polypodiophyta |
| Class: | Polypodiopsida |
| Order: | Polypodiales |
| Suborder: | Polypodiineae |
| Family: | Polypodiaceae |
| Subfamily: | Grammitidoideae |
| Genus: | Leucotrichum Labiak[1] |
| Type species | |
| Leucotrichum organense (Gardner) Labiak
| |
| Species | |
|
See text. | |
Leucotrichum is a genus of ferns in the family Polypodiaceae, subfamily Grammitidoideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I).[1] It is one of about 26 genera of "grammitids".[2] The name of the genus refers to the white hairs that are usually present on the underside of the frond.[3]
Taxonomy
Leucotrichum was established in 2010 and has about six currently recognized species. The type species for the genus is Leucotrichum organense.[3] Four of the species had been in Lellingeria, and one, Leucotrichum mortonii, had been in the defunct genus Xiphopteris.
In 2004, a phylogenetic study of DNA sequences of grammitids showed that a few species of Lellingeria are not closely related to the others.[4] They are sister to a clade of 26 species which at that time were in the genus Terpsichore. This was confirmed six years later in another molecular phylogenetic study on the grammitids.[2] In 2010, four species from Lellingeria and one from Xiphopteris were transferred to the new genus Leucotrichum.[3] The clade of 26 species that is sister to Leucotrichum was named as a new genus, Alansmia, in 2011.[5]
Species
(As of February 2020), the Checklist of Ferns and Lycophytes of the World accepted the following species:[6]
- Leucotrichum madagascariense Rakotondr. & Rouhan
- Leucotrichum mitchelliae (Baker) Labiak
- Leucotrichum mortonii (Copel.) Labiak
- Leucotrichum organense (Gardner) Labiak
- Leucotrichum pseudomitchelliae (Lellinger) Labiak
- Leucotrichum schenckii (Hieron.) Labiak
Distribution
Leucotrichum has a disjunct distribution. Leucotrichum organense and Leucotrichum schenckii are endemic to the Atlantic moist forests of coastal southeastern Brazil . Leucotrichum mortonii is known only from Cuba and the Dominican Republic. Leucotrichum pseudomitchellae occurs in Costa Rica and Panama. Leucotrichum mitchellae ranges through Mexico, Central America, and the Caribbean.[3] Leucotrichum madagascariense occurs in Madagascar .
References
- ↑ 1.0 1.1 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
- ↑ 2.0 2.1 Michael A. Sundue, Melissa B. Islam, and Tom A. Ranker. 2010. "Systematics of Grammitid Ferns (Polypodiaceae): Using Morphology and Plastid Sequence Data to Resolve the Circumscriptions of Melpomene and the Polyphyletic Genera Lellingeria and Terpsichore" Systematic Botany 35(4):701-715(15). doi:10.1600/036364410X539790 (See External links below).
- ↑ 3.0 3.1 3.2 3.3 Paulo H. Labiak, Germinal Rouhan, and Michael A. Sundue. 2010. "Phylogeny and taxonomy of Leucotrichum (Polypodiaceae): A new genus of grammitid ferns from the Neotropics". Taxon 59(3):911-921.
- ↑ Tom A. Ranker, Alan R. Smith, Barbara S. Parris, Jennifer M.O. Geiger, Christopher H. Haufler, Shannon C.K. Straub, and Harald Schneider. 2004. "Phylogeny and evolution of grammitid ferns (Grammitidaceae): a case of rampant morphological homoplasy". Taxon 53(2):415-428.
- ↑ Michael Kessler, Ana Laura Moguel Velázquez, Michael A. Sundue and Paulo H. Labiak. 2011. "Alansmia, a new genus of grammitid ferns (Polypodiaceae) segregated from Terpsichore. Brittonia 63(2):233-244. doi:10.1007/s12228-010-9156-y
- ↑ Hassler, Michael; Schmitt, Bernd (January 2020), "Leucotrichum", Checklist of Ferns and Lycophytes of the World, Version 8.20, https://worldplants.webarchiv.kit.edu/ferns/, retrieved 2020-02-22
External links
Wikidata ☰ Q6534441 entry
 |  |
