Merianthera calyptrata sp. nov. (Melastomataceae, Myrtales), a new candelabriform species from Minas Gerais, Brazil
Abstract
Merianthera is a genus of flowering plants with up to now seven species occurring in eastern Brazil, in the states of Bahia, Espírito Santo, and Minas Gerais. It belongs to the tribe Pyramieae (Melastomataceae), and can be recognized by its shrubby or treelet habit with caducous leaves, 5-merous flowers with a strongly zygomorphic androecium, the latter with dimorphic stamens bearing complex dorsal connective appendages, as well as an inferior ovary and capsular fruits. We describe here a new species of Merianthera from two collections and a photographic record, all from the same locality, an inselberg in the Municipality of Jacinto, in northeastern Minas Gerais. Its candelabriform habit, with a fistulose stem, and solitary, axillary or cauliflorous flowers are only shared with M. burlemarxii. However, M. calyptrata R.Goldenb., Bochorny & Fraga sp. nov. has at least three characters that are absent in M. burlemarxii and all other species in the genus: the total absence of both a peduncle and bracteoles, the calyptrate calyx and the fruits developing from inferior ovaries and dehiscing through longitudinal slits. The first character appears to be unknown in other species in the family.
References
Baumgratz J.F.A. 1985. Morfologia dos frutos e sementes de Melastomatáceas brasileiras. Arquivos do Jardim Botânico do Rio do Janeiro 27: 113–155
Bochorny T., Michelangeli F.A., Almeda F. & Goldenberg R. 2019. Phylogenetics, morphology and circumscription of Cambessedesieae: a new Neotropical tribe of Melastomataceae. Botanical Journal of the Linnean Society 190: 281–302. https://doi.org/10.1093/botlinnean/boz018
Bochorny T., Bacci L.F., Michelangeli F.A., Almeda F. & Goldenberg R. 2022. Systematics and evolution of tribe Pyramieae. In: Goldenberg R., Michelangeli F.A. & Almeda F. (eds) Systematics, Evolution, and Ecology of Melastomataceae: 359–371. Springer, Cham. https://doi.org/10.1007/978-3-030-99742-7_17
Clausing G., Meyer K. & Renner S.S. 2000. Correlations among fruit traits and evolution of different fruits within Melastomataceae. Botanical Journal of the Linnean Society 133: 303–326. https://doi.org/10.1111/j.1095-8339.2000.tb01548.x
Goldenberg R., Fraga C.N., Fontana A.P., Nicolas A. & Michelangeli F.A. 2012. Taxonomy and phylogeny of Merianthera (Melastomataceae). Taxon 65 (5): 1040–1056. https://doi.org/10.1002/tax.615010
IBGE, Instituto Brasileiro de Geografia e Estatística. 2022. Mapas. Available from https://mapas.ibge.gov.br/bases-e-referenciais/bases- cartograficas/malhas-digitais [accessed 4. Jul. 2023].
IUCN Standards and Petitions Committee. 2022. Guidelines for Using the IUCN Red List Categories and Criteria. Version 15.1. Prepared by the Standards and Petitions Committee. Available from https://www.iucnredlist.org/documents/RedListGuidelines.pdf [accessed 4. Jul. 2023].
Judd W.S, Majure L.C., Michelangeli F.A., Goldenberg R., Almeda F., Penneys D.S. & Stone R.D. 2022. Morphological variability vithin the Melastomataceae (Myrtales), including a discussion of the associated terminology. In: Goldenberg R., Michelangeli F.A. & Almeda F. (eds) Systematics, Evolution, and Ecology of Melastomataceae: 45–85. Springer, Cham. https://doi.org/10.1007/978-3-030-99742-7_3
Kuhlmann J.G. 1935. Novo gênero de Melastomataceae. Arquivos do Instituto de Biologia Vegetal do Rio do Janeiro 1: 231–233.
Michelangeli F.A. 2010. Neotropical myrmecophilous Melastomataceae: An annotated list and key. Procceedings of the California Academy of Sciences 61: 409–449.
Michelangeli F.A. & Goldenberg R. 2021. A revision of the florbella group of Miconia (Melastomataceae, Miconieae) with description of three new species. Brittonia 73: 85–105. https://doi.org/10.1007/s12228-020-09633-w
Michelangeli F.A., Nicolas A., Morales-P. M.E. & David H. 2011. Phylogenetic relationships of Allomaieta, Alloneuron, Cyphostyla, Wurdastom (Melastomataceae) and the resurrection of the tribe Cyphostyleae. International Journal of Plant Sciences 172: 1165–1178. https://doi.org/10.1086/662032
Penneys D.S., Almeda F., Reginato M., Michelangeli F.A., Goldenberg R., Fritsch P.W. & Stone R.D. 2022. A new Melastomataceae classification informed by molecular phylogenetics and morphology. In: Goldenberg R., Michelangeli F.A. & Almeda F. (eds) Systematics, Evolution, and Ecology of Melastomataceae: 109–165. Springer, Cham. https://doi.org/10.1007/978-3-030-99742-7_5
Porembski S., Martinelli G., Ohlemuller R. & Barthlott W. 1998. Diversity and ecology of saxicolous vegetation mats on the inselbergs in the Brazilian Atlantic rainforest. Diversity and Distributions 4: 107–119. https://doi.org/10.1046/j.1365-2699.1998.00013.x
QGIS, Development Team. 2022. QGIS Geographic Information System. Open Source Geospatial Foundation Project. Available from http://qgis.osgeo.org [accessed 14 Jul. 2023].
Radford A.E., Dickison W.C., Massey J.R. & Bell C.R. 1974. Vascular Plant Systematics. Harper & Row, New York.
SISEMA, Sistema Estadual de Meio Ambiente e Recursos Hídricos. 2022. Infraestrutura de dados espaciais do Sistema Estadual de Meio Ambiente e Recursos Hídricos. Belo Horizonte: IDE-Sisema. Available from http://idesisema.meioambiente.mg.gov.br [accessed 14 Jul. 2023].
Thiers B. continuously updated. Index Herbariorum: A global directory of public herbaria and associated staff. New York Botanical Garden’s Virtual Herbarium. Available from http://sweetgum.nybg.org/science/ih/ [accessed 14 Jul. 2023].
Ulloa Ulloa C., Almeda F., Goldenberg R., Kadereit G., Michelangeli F.A., Penneys D.S., Stone R.D. & Veranso-Libalah M.C. 2022. Melastomataceae: global diversity, distribution, and endemism. In: Goldenberg R., Michelangeli F.A. & Almeda F. (eds) Systematics, Evolution, and Ecology of Melastomataceae: 3–28. Springer, Cham. https://doi.org/10.1007/978-3-030-99742-7_1
Wurdack J.J. 1984. Certamen Melastomataceis XXXVII. Phytologia 55: 131–147.
Wurdack J.J. 1986. Atlas of hairs for Neotropical Melastomataceae. Smithsonian Contributions to Botany 63: 1–80. https://doi.org/10.5479/si.0081024X.63
Ziemmer J.K., Goldenberg R. & Amano E. 2017. Evolution of aquiferous pith and fistulae in Merianthera burlemarxii suggests a rare case of xerophytism in Melastomataceae. Botanical Journal of the Linnean Society 185: 119–127. https://doi.org/10.1093/botlinnean/box045
Copyright (c) 2023 Renato Goldenberg, Thuane Bochorny, André Márcio Amorim, Juliana Klostermann Ziemmer, Claudio Nicoletti de Fraga
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