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  5. Extended description and taxonomic notes on two recently rediscovered Myrcia (Myrtaceae) in the Brazilian Atlantic Forest.

Extended description and taxonomic notes on two recently rediscovered Myrcia (Myrtaceae) in the Brazilian Atlantic Forest.

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Resource type
Journal article
Creator (person)
Fernandes, Thiago
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Lucas, Eve J.
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Vasconcelos, Thais Nogales
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Braga, João Marcelo Alvarenga
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Date published
March 31, 2025
Abstract
Abstract In this paper, we present comprehensive data on two endemic and threatened species of Myrcia (Myrtaceae) from the Brazilian Atlantic Forest. Both belong to Myrcia sect. Aulomyrcia and were previously known only from a few collections made in the state of Rio de Janeiro. Apart from the type specimens and our recent collections, each species has been recollected on only three occasions. Considering the last collections of each species, Myrcia colpodes was rediscovered by our team after a collection gap of 64 years, while M. rubiginosa was found after 16 years. Myrcia colpodes can be recognized by vinaceous, exfoliating bark on the trunk, strongly bullate leaves and relatively long, glabrous panicles. Myrcia rubiginosa is characterized by fissured, greyish-brown bark on the trunk, conspicuous brownish and tomentose indumentum on young leaves and inflorescences, and pendular panicles with relatively small flowers. Data provided here include updated morphological descriptions for the taxa, along with notes on their morphological affinities and geographic distribution. Their fruits are here described and illustrated for the first time. Resumen Neste artigo, apresentamos dados taxonômicos abrangentes para duas espécies endêmicas e ameaçadas de Myrcia (Myrtaceae) da Mata Atlântica brasileira. Ambas pertencem a Myrcia sect. Aulomyrcia e eram previamente conhecidas apenas por poucas coletas feitas no estado do Rio de Janeiro. Além dos espécimes-tipo e nossas coletas recentes, cada espécie foi coletada apenas em três ocasiões. Considerando a última coleta de cada espécie, Myrcia colpodes foi redescoberta por nossa equipe após um intervalo de 64 anos, enquanto M. rubiginosa foi encontrada após 16 anos. Myrcia colpodes pode ser reconhecida pelo tronco com casca vinácea e esfoliante, folhas fortemente buladas e panículas relativamente longas e glabras. Myrcia rubiginosa se caracteriza pelo tronco com casca fissurada e marrom-acinzentada, indumento marrom conspícuo e tomentoso nas folhas jovens e inflorescências, e panículas pendulares com flores relativamente pequenas. Os dados fornecidos aqui incluem descrições morfológicas atualizadas para os táxons, juntamente com notas sobre suas afinidades morfológicas e distribuição geográfica. Seus frutos são aqui descritos pela primeira vez.
Project(s)
Priority 4: Accelerated Taxonomy
Funder
Funder nameAwards
Conselho Nacional de Desenvolvimento Científico e Tecnológico, Brazil
Scholarship (Process n°. 141327/2020-0)
Journal title
Rodriguésia
Volume
76
Article number
e00292024
Publisher
FapUNIFESP (SciELO)
Place of publication
Brazi
ISSN
0370-6583
eISSN
2175-7860
Date accepted
October 22, 2024
Official URL
https://doi.org/10.1590/2175-7860202576005
Related URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2175-78602025000100204&tlng=en
Rights statement
In Copyright
Licence
https://creativecommons.org/licenses/by/4.0/
DOI
10.1590/2175-7860202576005
Keywords
Brazil
Myrcia colpodes
Rare species
Neotropics
Myrcia
Endangered species
Myrcia rubiginosa
Aulomyrcia
Rio de Janeiro (Brazil)
Additional information
IF = 0.63 (2024)
Managed by the British Library and supported by the AHRC

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