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Bringing some order to chaos: two new species of Myrcia separated from M. pubipetala (Myrtaceae)

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Summary

We describe two new species of Myrcia (Myrtaceae) and contrast them with morphologically related species. Morphological illustrations, a map of occurrence records, habitat documentation, a description of phenological activity, comments on ecology and a preliminary conservation status of the new taxa are also presented. The new taxa are named Myrcia chrysotrichoma T.Fern. & Stagg. (from São Paulo, Paraná and Santa Catarina states) and M. ribeirensis T.Fern. & D.F.Lima (from São Paulo and Paraná states). Both species inhabit montane and riparian forests in the Atlantic Forest and are morphologically similar to M. pubipetala Miq. However, M. chrysotrichoma differs from this species in its long and golden trichomes and reduced panicles. Myrcia ribeirensis differs from M. pubipetala by its thin and delicate leaf blades and reflexed calyx lobes. Myrcia chrysotrichoma is also compared with other three similar Atlantic Forest species: M. isaiana G.M.Barroso & Peixoto, M. maximiliana O.Berg and M. guarujana Sobral, Magenta & Caliari. We also present an identification key that includes all of the species cited throughout this study.

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Acknowledgements

This research was partially supported by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) through the master’s fellowship granted to T.F. (88887.177207/2018-00) and post-doc fellowship granted to D.F.L. (88887.371829/2019-00), and by São Paulo Research Foundation (FAPESP) through a post-doctoral fellowship granted to VGS (grants #2014/13899-4 and #2016/02312-8). T.F. also thanks Universidade Federal Fluminense (UFF) as well as the research team of the Botany Department and NIT Herbarium for providing laboratory support. Authors are especially grateful to the curators of the cited herbaria, the collectors of the examined specimens, M. F. Santos, M. Sobral and T. N. C. Vasconcelos for valuable discussions, and finally J. B. Baitello and P. H. Gaem for sending images of specimens from SPSF and SORO, respectively.

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Authors and Affiliations

  1. Instituto de Pesquisas, Jardim do Botânico do Rio de Janeiro, Rua Pacheco Leão 915, Rio de Janeiro, 22460-030, Brazil

    Thiago Fernandes

  2. Programa de Pós-Graduação em Biologia de Fungos, Algas e Plantas, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, 88040-900, Brazil

    Duane F. Lima

  3. Herbarium, Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AB, UK

    Eve Lucas

  4. Departamento de Ecologia, Centro de Biociências, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte, 59078-970, Brazil

    Vanessa G. Staggemeier

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  1. Thiago Fernandes
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Fernandes, T., Lima, D.F., Lucas, E. et al. Bringing some order to chaos: two new species of Myrcia separated from M. pubipetala (Myrtaceae). Kew Bull 76, 427–442 (2021). https://doi.org/10.1007/s12225-021-09962-3

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