Plenasium
Genus of ferns
From Wikipedia, the free encyclopedia
Plenasium is a genus of ferns in the family Osmundaceae.[1] It is recognized in the Pteridophyte Phylogeny Group classification of 2016 (PPG I),[2] but kept within a more broadly circumscribed genus Osmunda by other sources.[3] The genus is known from Early Cretaceous to present.[4]
| Plenasium Temporal range: | |
|---|---|
| |
| Plenasium vachellii (syn. Osmunda vachellii) in the Shing Mun Arboretum, Hong Kong | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Division: | Polypodiophyta |
| Class: | Polypodiopsida |
| Order: | Osmundales |
| Family: | Osmundaceae |
| Genus: | Plenasium C.Presl[1] |
| Type species | |
| Plenasium banksiifolium (Presl) Presl | |
| Species | |
| Synonyms | |
| |
Taxonomy
As of October 2019[update], the Checklist of Ferns and Lycophytes of the World accepted the following four species:[1]
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The following fossil species are also accepted.[4]
- †P. arnoldii (C.N.Mill. 1967) Bomfleur, Grimm & McLoughlin 2017
- †P. bransonii (Tidwell & Medlyn, 1991) Bomfleur, Grimm & McLoughlin 2017 (?Eocene: New Mexico, USA).
- †P. burgii (Tidwell & J.E.Skog, 2002) Bomfleur, Grimm & McLoughlin 2017 (Early Cretaceous: Nebraska, USA).
- †P. chandleri (Arnold 1952) Bomfleur, Grimm & McLoughlin
- †P. crossii (Tidwell & L.R.Parker, 1987) Bomfleur, Grimm & McLoughlin 2017 (Paleocene: Wyoming, USA).
- †P. dakotense (Tidwell & J.E.Skog, 2002) Bomfleur, Grimm & McLoughlin 2017 (Early Cretaceous: South Dakota, USA).
- †P. dowkeri (Carruthers 1870) Bomfleur, Grimm & McLoughlin 2017
- †P. moorei (Tidwell & Medlyn, 1991) Bomfleur, Grimm & McLoughlin 2017 (?Eocene: New Mexico, USA).
- †P. nebraskense (Tidwell & J.E.Skog, 2002) Bomfleur, Grimm & McLoughlin 2017 (Early Cretaceous: Nebraska, USA).
- †P. (Aurealcaulis) elegans Hiller et al. 2019 (Eocene, Vietnam)[7]
- †P. (Plenasium) xiei Cheng et al. 2019 (Late Cretaceous, Northeastern China)[8]
