Topic
Cystopteridaceae
About: Cystopteridaceae is a research topic. Over the lifetime, 12 publications have been published within this topic receiving 226 citations.
Papers
TL;DR: This work presents a family-level classification for the eupolypod II clade of leptosporangiate ferns, one of the two major lineages within the Eupolypods, andone of the few parts of the fern tree of life where family- level relationships were not well understood at the time of publication of the 2006 fern classification.
Abstract: We present a family-level classification for the eupolypod II clade of leptosporangiate ferns, one of the two major lineages within the Eupolypods, and one of the few parts of the fern tree of life where family-level relationships were not well understood at the time of publication of the 2006 fern classification by Smith & al. Comprising over 2500 species, the composition and particularly the relationships among the major clades of this group have historically been contentious and defied phylogenetic resolution until very recently. Our classification reflects the most current available data, largely derived from published molecular phylogenetic studies. In comparison with the five-family (Aspleniaceae, Blechnaceae, Onocleaceae, Thelypteridaceae, Woodsiaceae) treatment of Smith & al., we recognize 10 families within the eupolypod II clade. Of these, Aspleniaceae, Thelypteridaceae, Blechnaceae, and Onocleaceae have the same composition as treated by Smith & al. Woodsia- ceae, which Smith & al. acknowledged as possibly non-monophyletic in their treatment, is circumscribed here to include only Woodsia and its segregates; the other "woodsioid" taxa are divided among Athyriaceae, Cystopteridaceae, Diplaziopsidaceae, Rhachidosoraceae, and Hemidictyaceae. We provide circumscriptions for each family, which summarize their morphological, geographical, and ecological characters, as well as a dichotomous key to the eupolypod II families. Three of these families— Diplaziopsidaceae, Hemidictyaceae, and Rhachidosoraceae—were described in the past year based on molecular phylogenetic analyses; we provide here their first morphological treatment.
165 citations
TL;DR: This work assembles a three-locus plastid dataset (matK, rbcL, trnG-R) that includes most recognized species in the Cystopteridaceae and multiple accessions of widespread taxa from across their geographic ranges, and yields the first species-level phylogeny of the family and the first molecular phylogenetic evidence for species boundaries.
Abstract: Among the novel results of recent molecular phylogenetic analyses are the unexpectedly close evolutionary relationships of the genera Acystopteris, Cystopteris, and Gymnocarpium, and the phylogenetic isolation of these genera from Woodsia As a consequence, these three genera have been removed from Woodsiaceae and placed into their own family, the Cystopteridaceae Despite the ubiquity of this family in rocky habitats across the northern hemisphere, and its cosmopolitan distribution (occurring on every continent except Antarctica), sampling of the Cystopteridaceae in phylogenetic studies to date has been sparse Here we assemble a three-locus plastid dataset (matK, rbcL, trnG-R) that includes most recognized species in the family and multiple accessions of widespread taxa from across their geographic ranges All three sampled genera are robustly supported as monophyletic, Cystopteris is strongly supported as sister to Acystopteris, and those two genera together are sister to Gymnocarpium The Gym
34 citations
TL;DR: To evaluate the utility of spore morphology in the taxonomy of each genus, spores of 14 species of Cystopteridaceae from northern Asia were examined using scanning electron microscopy, focusing particularly on perispore characters and spore size.
Abstract: Spores of Cystopteridaceae from northern Asia were examined using scanning electron microscopy. To evaluate the utility of spore morphology in the taxonomy of each genus, we examined spores of 14 s...
16 citations
TL;DR: The phylogenetic relationships of Cystoathyrium chinense with potential relatives densely sampled using three chloroplast DNA markers support the inclusion of the species in Cystopteris and a new combination is made based on the new observations in the field.
Abstract: Cystoathyriumchinense Ching, thesole representative of Cystoathyrium, isa critically endangeredspeciesendemictoChinawithnomorethan40extantindividuals.Untilnow,itssystematicpositionandrelationshipsamongleptosporangiatefernsremainedunknown.ThepresentstudyassessedthephylogeneticrelationshipsofCystoathyriumchinense with potential relatives densely sampled using three chloroplast DNA markers (matK, rbcL,andtrnG‐Rintergenic spacer). Our results support the inclusion of Cystoathyrium in Cystopteris. A hybrid origin hypothesis ofCystoathyrium chinense is neither supported nor rejected by the present study. According to our ancestral areareconstructionanalysis,thedisjunctdistributionofCystoathyriumanditscloselyrelatedNorthAmericantaxamaybeattributed tothelong‐distancedispersal byway ofBeringia.Consequently,a new combination (Cystopterischinensiscomb. nov.) is made, and the description is supplemented based on our new observations in the field.Key words Cystoathyrium, Cystopteridaceae, Cystopteris, eastern Asian–North American disjunction,hybridization hypothesis, molecular phylogeny.Cystoathyrium chinense Ching was described(Fig. 1) to accommodate a species believed by R. C.Ching to show characteristics representative of bothCystopteris and Athyrium (Ching, 1966). It wascollected for the first time in 1963, and re‐collectedin 1982.Since then many attempts have failed to find itagain, until recently.RestrictedtothetemperatebroadleafforestofErlangMountaininSichuan,China,atanelevationofca.2450m,Cystoathyrium chinense wasbelievedtobeawildextinctspecies (Zhang, 2012). It was rediscovered only recentlyinthefield,whereitgrowsonwetrockyslopesbystreamsunderdeciduousforestdominatedby AcerlaxiflorumPax,Betula utilis D. Don., and Pterocarya insignis Rehder E Wang, 1997, 1999; Wangetal.,2004).Wang(1999)tentativelyplacedthisgenusclose to Cystopteris by stressing their shared features,suchasglabrouspetiolesandleaveswithoutanyscales,basiscopic and inferior indusia (i.e., hidden bysporangia), and spiny perispores. It was treated as amember of Athyrium by some workers because thediagnosticcharacterswerenotuniquetoCystoathyrium(Pichi‐Sermolli, 1977; Kramer et al., 1990). Forexample, the decumbent rhizomes characterizingCystoathyrium are also found in some Athyrium taxa,such as A. fallaciosum Milde and A. rupicola (Edgew.ex C. Hope) C. Chr. Therefore, the ambiguousplacement and circumscription of Cystoathyrium wasprobably caused by insufficient analyses and observa-tions of its morphological characters (Wang, 1999).Eupolypods II, representing one of the largest fernlineages, has been well circumscribed by recentmolecular phylogenetic and revisionary studies(Schuettpelz & Pryer, 2007; Rothfels et al., 2012a,2012b).Meanwhile,circumscriptionsofmanypuzzlinggenera residing in it are becoming clearer (e.g.,Acystopteris, Cystopteris, and Gymnocarpium, Roth-fels et al., 2013; Allantodia, Callipteris, and Mono-melangium, Wei et al., 2013; Diellia, Schneider
15 citations
TL;DR: Cystopteris dickieana, a rare circum-Holarctic species, is recorded for the first time for the NW part of the Balkan area and mature spores rugose characterize this fern within the C. fragilis species complex.
Abstract: Cystopteris dickieana, a rare circum-Holarctic species, is recorded for the first time for the NW part of the Balkan area. Mature spores rugose characterize this fern within the C. fragilis species...
10 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 1 |
| 2020 | 1 |
| 2019 | 1 |
| 2018 | 1 |
| 2015 | 3 |
| 2014 | 2 |