Abstract
Geastrum is a genus with worldwide distribution and the most species-diverse in the family Geastraceae and is easily recognized by the star-like basidioma in the majority of species. The most recent and accepted classification based on phylogenetic, morphological and chemical data, subdivided the genus into 14 sections. The section Exareolata is formed by eleven species from which only G. echinulatum and G. verrucoramulosum are truly stipitate. During field trips in Brazilian Amazonia, we found a stipitate species of Geastrum. Based on morphological and phylogenetic data, we propose it as a new species for the genus, which forms a sister group of G. verrucoramulosum and is allocated in sect. Exareolata. Geastrum squameoramulosum sp. nov. is characterized by a prominent and well-developed ramified stipe and the presence of scales on the outer surface of the exoperidium. It is known so far only from the Amazon rainforest. We also provide an updated key to the species in this section.
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Acknowledgements
The authors thank the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior for a scholarship for TSC (CAPES 88882.317512/2019-01), the Conselho Nacional de Desenvolvimento Científico e Tecnológico for a fellowship for CRC (303477/2018-0) and funding (CNPq Universal 473422/2012-3), and the Fundação de Amparo à Pesquisa do Estado do Amazonas (FAPEAM 3137/2012) for funding. We also thank Dirce L. Komura and Ricardo Braga Neto for collecting support. The authors declare they do not have any conflict of interest. The present work did not involve human/animal participants. All authors consent to participate in this manuscript.
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Cabral, T.S., Sousa, J.O., da Denise Barbosa da Silva, B. et al. Updates on Geastrum sect. Exareolata, with a description of a striking new species from the Neotropics. Plant Syst Evol 308, 23 (2022). https://doi.org/10.1007/s00606-022-01814-2
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DOI: https://doi.org/10.1007/s00606-022-01814-2