Phylogenetics and Evolutionary History of Osmundaceae Ferns

The royal ferns (family Osmundaceae) represent one of the most ancient and enduring lineages of leptosporangiate ferns, with fossil evidence extending back to the late Palaeozoic. Despite their modest modern diversity—fewer than twenty species divided among six genera—the group possesses a remarkably rich fossil record, including anatomically preserved trunks, rhizomes and fronds spanning more than 300 million years. Phylogenetic studies combining molecular data from chloroplast and nuclear markers with morphological character matrices have resolved major lineages within Osmundaceae, clarifying relationships among the subfamilies Osmundoideae and Todeoideae and recognising genera such as Osmunda, Osmundastrum and Plenasium. Debates over the monophyly of Osmunda have been informed by integrative analyses that reconcile morphological, anatomical and molecular evidence, leading to revised hypotheses of root placement and divergence timing. Biogeographical reconstructions place the origin of modern royal fern clades in Gondwanan swamps, with subsequent dispersal to Laurasian temperate regions. This evolutionary history underpins current efforts to use royal ferns as model systems for palaeoenvironmental reconstruction, conservation of relict communities and studies of developmental evolution in vascular plants.

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Phylogenetics and Evolutionary History of Osmundaceae Ferns publication trend

The graph below shows the total number of articles in phylogenetics and evolutionary history of osmundaceae ferns across all publications each year (not limited to Nature Index journals).

Technical terms

Phylogenetics: the study of evolutionary relationships among species using genetic and morphological data.

Monophyletic: a group of organisms that includes a common ancestor and all its descendants.

Paraphyletic: a group of organisms that includes a common ancestor but not all its descendants.

Morphological character matrix: a data table of anatomical or structural traits used to infer phylogenetic relationships.

Ecological stasis: long-term persistence of community structure and function with little evolutionary change.

References

1. The fossil Osmundales (Royal Ferns)—a phylogenetic network analysis, revised taxonomy, and evolutionary classification of anatomically preserved trunks and rhizomes. PeerJ (2017).
2. Jurassic Osmundaceous Landscapes in Patagonia: Exploring the Concept of Ecological Stasis in the Deseado Massif, Argentina. Plants (2025).
3. A revision of the fern family Osmundaceae in Brazil. Acta Botanica Brasilica (2022).
4. Osmunda pulchella sp. nov. from the Jurassic of Sweden—reconciling molecular and fossil evidence in the phylogeny of modern royal ferns (Osmundaceae). BMC Ecology and Evolution (2015).