Abstract
An expanded phylogenetic reconstruction based on the nuclear ribosomal DNA internal transcribed spacer region (nrDNA ITS) in conjunction with a multivariate statistical analysis of morphological characters revealed a new species and the re-acknowledgement of another one in Sclerorhachis (Compositae, Anthemideae). The newly revealed species, Sclerorhachis ferdowsii, has been previously included in the so-called S. platyrachis-complex, but is easily distinguished as an independent species by its rhizomatous root system, sparsely paleate receptacles, coronate and costate achenes, the relatively smaller size of the capitula, and the smaller habit of the whole plant. Additionally, morphological and molecular data corroborated S. paropamisica as a distinct species rather than being conspecific with S. platyrachis. With these newly acknowledged taxa, the number of species in Sclerorhachis is now expanded to eight. A detailed morphological description, an illustration, and distribution maps for S. ferdowsii, along with an identification key for all species of Sclerorhachis, are provided.
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All DNA sequences are publicly available through Genbank. All other data included in the manuscript.
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Acknowledgements
The authors are grateful to Dr. Farshid Memariani (Ferdowsi University of Mashhad) for his guidance in preparing the conservation status of the species. Khadijeh Motahhari is appreciated for preparing the distribution maps. We are thankful to the following herbaria: B, E, FUMH, IRAN, K, LE, MPH, TARI, M, MSB, P, and W for assisting with the material review and sending type images.
Funding
This study was partly funded by the Ferdowsi University of Mashhad through the research project 48774–2.
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SH: Supervising the study, specimen study, plant collection, laboratory procedures, molecular analyses, and manuscript preparation. HM: Supervising the study, specimen study, plant collection, laboratory procedures, molecular analyses, and manuscript preparation. AS: providing some references, manuscript revision. SSH: laboratory procedures, manuscript revision. AP: molecular analyses, manuscript revision. MRJ: Specimen study, manuscript revision. CO: providing some references, manuscript revision.
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Hassanpour, S., Moazzeni, H., Sonboli, A. et al. Molecular and morphological data reveal a new species of Sclerorhachis (Compositae, Anthemideae) and the reassessment of another species of the genus. Plant Syst Evol 309, 10 (2023). https://doi.org/10.1007/s00606-022-01840-0
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DOI: https://doi.org/10.1007/s00606-022-01840-0