Topic
Actiniopteris
About: Actiniopteris is a research topic. Over the lifetime, 14 publications have been published within this topic receiving 191 citations.
Papers
1 Jan 1962
TL;DR: In modern times Actiniopteris has been regarded as monotypic, but a study of more than 500 specimens has shown that five species may be kept distinct and three are described as new species.
Abstract: SUMMARY The fern genus Actiniopteris is studied from the taxonomical point of view. It is regarded by some authors as a «genus incertae sedis». It belongs to the order of the Pteridales. A comparison with other genera of this order has shown that it is nearer to the Cryptogrammaeeae than to any other family. However, its distinctive features are so important as to justify its classification as a new independent family which is described under the name of ACTI- NIOPTERIDACEAE. Two species were originally assigned to Actiniopteris: A. radiata and A. australis. The former is selected as type of the genus. In modern times Actiniopteris has been regarded as monotypic, but a study of more than 500 specimens has shown that five species may be kept distinct. Two of them are those originally referred to the genus by LINK. Three are described as new species. Thus the genus is regarded as consisting of A. radiata, A. di- morpha, A. pauciloba, A. semiflabellata and A. australis. The differences between them are based...
24 citations
TL;DR: The phylogenetic relationships of two understudied fern species belonging to the pteridoid clade of Pteridaceae are addressed, contributing to the rapidly increasing body of evidence supporting the hypothesis of a frequent exchange between the Asian and Afromadagascan fern-floras during the Cenozoic.
Abstract: Using DNA sequences of the choroplast genome, we addressed the phylogenetic relationships of two understudied fern species belonging to the pteridoid clade of Pteridaceae. The two studied species occur in Afro-Madagascar and the Sino- Himalaya respectively. Our results recovered a sister relationship of the Sino-Himalayan Cerosora microphylla and the Afromadagascan Pityrogramma argentea . The latter is not closely related to the predominantly Neotropical genus Pityrogramma and is transferred to the genus Cerosora . Our results also confirmed the sister relationship of the predominantly Afromadagascan genus Actiniopteris and the predominantly Sino-Himalayan genus Onychium . These results contribute to the rapidly increasing body of evidence supporting the hypothesis of a frequent exchange between the Asian and Afromadagascan fern-floras during the Cenozoic and the formation of relict distribution ranges caused by Cenozoic climatic fluctuations and adaptation to local environments.
19 citations
31 Dec 1982
10 citations
1 Jan 2020
TL;DR: A brief introduction to the discovery of a newly recorded fern, Actiniopteris semiflabellata Pic.Serm.
Abstract: A brief introduction to the discovery of a newly recorded fern, Actiniopteris semiflabellata Pic.Serm. (Pteridaceae), in the United Arab Emirates (UAE) and its description are given.
6 citations
TL;DR: It is found that representatives of Actiniopteris and Onychium had originated in a common African-Indo-Malesian area, which is experiencing high levels of human impact, leading to disjunctions among the studied taxa.
Abstract: This research is the first comprehensive analysis of the intrageneric relationships of Actiniopteris and Onychium based on original data including spore morphology, phylogeny and phylogeography. Actiniopteris and Onychium are members of the large subfamily Pteridoideae of the family Pteridaceae. The Pteridaceae family is considered one of the most taxonomically confusing families due to its representatives high level of polymorphism. We used an interdisciplinary approach to study the “Onychium clade”: 13 taxa were studied using scanning electron microscopy (SEM) to characterize the morphology and morphometry of spores; 14 taxa were studied from a phylogenetic perspective, including character evolution and ancestral character state reconstructions; 15 taxa of “Onychium clade” were studied using herbarium data (B, P, PE, LE, VLA, TI, KYO, ALTB and TK) according to global botanical and geographical zones. As a result of this integrated analysis, we established a deep divergence of the taxa O. tenuifrons and O. siliculosum from the main composition of the genus Onychium and the division the genus Actiniopteris into two clades: A. radiata–A. semiflabellata and A. australis–A. dimorpha. We found that representatives of Actiniopteris and Onychium had originated in a common African-Indo-Malesian area. The “Onychium clade” center of diversity is the Indian Region, which is experiencing high levels of human impact, leading to disjunctions among the studied taxa.
6 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2020 | 2 |
| 2018 | 1 |
| 2016 | 1 |
| 2015 | 3 |
| 2013 | 1 |
| 2009 | 1 |