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A research visit of RR to E was funded by the Edinburgh Botanic Garden (Sibbald) Trust as part of Sibbald Project No: 2022#05 Revision of Euphorbia & Croton in the Maranon dry forest, Peru. Fieldwork was conducted as part of the Newton-Paulet funded project 'Increasing knowledge of dry and montane ecosystems across Peru' (project number 418235692) . Financed in Peru by CONCYTEC-PROCIENCIA as part of Biodiversity-Institutional Links-Expeditions 2018-02 call [Agreement NOo 026-2019-FONDECYT] . Specimens were collected under the research permit issued by SERFOR with RDG N degrees 002-2020 MINAGRI-SERFOR-DGGSPFFS and RDG No 602-2019-MINAGRI-SERFOR-DGGSPFFS. JMM thanks the Real Jardin Botanico-CSIC, for allowing him to conduct two summer internships (2021, 2022) . We also thank Tiina Saerkinen from RBGE for her help and support. This work has benefited from collaborations within the DRYFLOR network with the support of CYTED (Grant/Award: 418RT0554) . RMSAM received productivity grants from CNPq - Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (#307987/2022-1) . RMSAM thanks the Centro de Microscopia e Microanalise da Universidade Federal de Vicosa for technical assistance and the financial support of Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES, Finance Code 001) and Fundacao de Amparo a Pesquisa do Estado de Minas Gerais (FAPEMIG) .

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Croton maranonensis: : a new species of Euphorbiaceae from the tropical inter-Andean dry valleys

Publicado en:EUROPEAN JOURNAL OF TAXONOMY 947 (): 289-308 - 2024-08-28 947(), DOI: 10.5852/ejt.2024.947.2639

Autores: Martin-Munoz, Juan; Silva, Elienai Candida e; Gonzales, Paul; Munoz-Sanchez, Alvaro; Cumbicus, Nixon; Goodwin, Zoe; Meira, Renata Maria Strozi Alves; Riina, Ricarda

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We describe Croton maranonensis Riina & Martin-Mu & ntilde;oz sp. nov., a species in Croton section Julocroton (Mart.) G.L.Webster from the seasonally dry tropical forests and shrublands of the inter-Andean valleys. This species is a small shrub occurring along the Mara & ntilde;& oacute;n river valley in Peru and similar dry areas in southern Ecuador. We surveyed morpho-anatomical characters of the new species and closely related taxa. To confirm the placement of the new species in C . section Julocroton, , we conducted a molecular phylogenetic analysis including three accessions of the new species and selected representatives of section Julocroton and related groups within Croton L. Micro- and macro- morphological evidence, and molecular data support C. maranonensis sp. nov. as an independent lineage within the C . section Julocroton clade. We compared the new species with morphologically similar species in the same section that also occur in the Andean region, including C. flavispicatus Rusby, C. triqueter Lam., and C. hondensis (H.Karst.) G.L.Webster.

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