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Issue: Vol. 750 No. 2: 1 Apr. 2026
Type: Article
Published: 2026-04-01
DOI: 10.11646/phytotaxa.750.2.1
Page range: 71-85
Abstract views: 0
PDF downloaded: 0

Taxonomic notes on Aciotis (Melastomataceae) from the Brazilian Amazon: A new species and the updated distribution of Aciotis ferreirana, a rarely collected species

Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rua Pacheco Leão 915, 22460-030, Rio de Janeiro, Rio de Janeiro, Brazil
Instituto Nacional de Pesquisas da Amazônia, Ecologia, Monitoramento e Uso Sustentável de Áreas Úmidas, Av. André Araújo 2936, 69067-375, Manaus, Amazonas, Brazil
Embrapa Amazônia Oriental, Tv. Dr. Enéas Pinheiro, 66095-903, Belém, Pará, Brazil
Instituto Tecnológico Vale – Desenvolvimento Sustentável, 66055-200, Belém, Pará, Brazil
Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rua Pacheco Leão 915, 22460-030, Rio de Janeiro, Rio de Janeiro, Brazil
Adolpho Ducke Forest Reserve campinarana Caquetá Central Amazon Marcetieae chorological record little-known species Eudicots

Abstract

Aciotis manauara is described here as a new species to the municipality of Manaus, the capital of the Brazilian state of Amazonas. It was discovered in the Adolpho Ducke Forest Reserve and a surrounding area, in a forested campinarana and baixio habitats. Aciotis manauara is compared to A. indecora, A. rubricaulis, and A. viscida, the morphologically most similar species. To highlight diagnostic characters, we provide line drawings, photographs of living specimens, and scanning electron microscopy images of the leaf blades and seeds of A. manauara. Based on current available data, its conservation status is preliminarily assessed as Critically Endangered (CR) according to IUCN guidelines and criteria. In addition, we present an identification key and photographs of living specimens for the species of Aciotis occurring in the Adolpho Ducke Forest Reserve. Lastly, we reviewed the geographic distribution of the poorly collected species Aciotis ferreirana, which is endemic to the Brazilian Amazon and occurs only in the states of Amazonas and Rondônia. Its occurrence in Mato Grosso should not be recognized.

References

  1. Anjos, C.B., Dias, A.C.A.A. & Pastore, J.F.B. (2024) Securidaca aurea (Polygalaceae, Polygaleae), a new species from the Brazilian Amazon. Kew Bulletin 79: 955–961. https://doi.org/10.1007/s12225-024-10211-6
  2. Bachman, S., Moat, J., Hill, A.W., de la Torre, J. & Scott, B. (2011) Supporting red list threat assessments with GeoCAT: Geospatial conservation assessment tool. ZooKeys 150: 117–126. https://doi.org/10.3897/zookeys.150.2109
  3. Beentje, H. (2016) The Kew Plant Glossary: An illustrated dictionary of plant terms. Ed. 2. Royal Botanic Gardens, Kew, Richmond.
  4. Bentham, G. (1842) Contributions towards a Flora of South America.—Enumeration of plants collected by Mr. Schomburgk, in British Guiana. Journal of Botany 4: 99–133.
  5. Brade, A.C. (1958) Melastomatáceas novas da região amazônica. Publicações do Instituto Nacional de Pesquisas da Amazônia 8: 3–18.
  6. Candolle, A.P. (1828) Melastomaceae. In: Candolle, A.P. (Ed.) Prodromus systematis naturalis regni vegetabilis, sive enumeratio contracta ordinum, generum, specierumque plantarum huc usque cognitarum, juxta methodi naturalis normas digesta. Vol. 3. Sumptibus Sociorum Treuttel et Würtz, Parisiis [Paris], pp. 99–202.
  7. Cogniaux, A. (1885) Melastomaceae. Tribus II. Tibouchineae Baill. In: Martius, C.F.P. & Eichler, A.G. (Eds.) Flora brasiliensis, enumeratio plantarum in Brasilia hactenus detectarum: quas suis aliorumque botanicorum studiis descriptas et methodo naturali digestas partim icone illustratas. Vol. 14. Frid. Fleischer, Monachii et Lipsiae [Munich & Leipzig], pp. 205–510. https://doi.org/10.5962/bhl.title.454
  8. Costa, D.S., Batista, C.A.S. & Rossetto, E.F.S. (2023) Two new species of Neea (Nyctaginaceae: Pisonieae) from humid forests in northern and northeastern Brazil. Kew Bulletin 78: 547–556. https://doi.org/10.1007/s12225-023-10126-8
  9. Costa, D.S., Rossetto, E.F.S. & Giacomin, L.L. (2025) Neea contracta (Nyctaginaceae), a new species from Amazonia. Systematic Botany 49: 743–748. https://doi.org/10.1600/036364424X17323182682735
  10. Demarchi, L.O., Klein, V.P., Schöngart, J., Wittmann, F. & Piedade, M.T.F. (2024) As formações vegetais amazônicas sobre areias brancas: Campinaranas. In: Wolfgang, J.J. & Cunha, C.N. (Orgs.) Inventário das áreas úmidas brasileiras: Distribuição, ecologia, manejo, ameaças e lacunas de conhecimento. 1ª ed. Carlini & Caniato Editorial, Cuiabá-MT, pp. 375–406.
  11. Devecchi, M.F., Thomas, W.W. & Pirani, J.R. (2022) Flora of the Reserva Ducke, Amazonas, Brazil: Simaroubaceae. Rodriguésia 73: e00182020. https://doi.org/10.1590/2175-7860202273045
  12. Don, D. (1823) An illustration of the natural family of plants called Melastomaceae. Memoirs of the Wernerian Natural History Society 4: 276–329.
  13. Farroñay, F., Santamaría-Aguilar, D., Silva, J.B., Macedo, M.T.S., Andrade, A., Pilco, M.V. & Vicentini, A. (2025) Virola williamii, a new psychoactive myristicaceous species from the Amazon basin. Brittonia 77: 173–183. https://doi.org/10.1007/s12228-024-09826-7
  14. Ferreira, S.J.F., Miranda, S.Á.F., Marques Filho, A.D.O. & Silva, C.C. (2012) Efeito da pressão antrópica sobre igarapés na Reserva Florestal Adolpho Ducke, área de floresta na Amazônia Central. Acta Amazonica 42: 533–540. https://doi.org/10.1590/S0044-59672012000400011
  15. Fortes, E.A., Silva, G.S. & Mansano, V.F. (2023) Two new species of Eperua (Leguminosae, Detarioideae, Detarieae) from the Amazon and Cerrado Biomes discovered in a botanical garden and a backyard. Phytotaxa 591: 196–208. https://doi.org/10.11646/phytotaxa.591.3.2
  16. Freire-Fierro, A. (2001a) Aciotis (Melastomataceae): Two new species from the northwestern lowlands of South America. Novon 11: 166–170. https://doi.org/10.2307/3393053
  17. Freire-Fierro, A. (2001b) Aciotis. In: Berry, P.E., Yatskievych, K. & Holst, B.K. (Eds.) Flora of the Venezuelan Guayana. Vol. 6. Missouri Botanical Garden Press, Missouri, pp. 270–276.
  18. Freire-Fierro, A. (2002) Monograph of Aciotis (Melastomataceae). Systematic Botany Monographs 62: 1–99. https://doi.org/10.2307/25027895
  19. Hopkins, M.J.G. (2005) Flora da Reserva Ducke, Amazonas, Brasil. Rodriguésia 56: 9–25. https://doi.org/10.1590/2175-78602005568602
  20. IUCN (2012) IUCN Red List categories and criteria. Version 3.1. Ed. 2. IUCN, Gland, Switzerland and Cambridge, UK.
  21. IUCN Standards and Petitions Committee (2024) Guidelines for using the IUCN Red List categories and criteria. Version 16. Prepared by the Standards and Petitions Committee. Available from: https://www.iucnredlist.org/documents/RedListGuidelines.pdf (accessed 2 March 2026)
  22. Kataoka, E.Y. & Lohmann, L.G. (2021) Taxonomic revision of Martinella Baill. (Bignonieae, Bignoniaceae). PhytoKeys 177: 77–116. https://doi.org/10.3897/phytokeys.177.64465
  23. Kimball, S., Mattis, P. & the GIMP developer team (1995–2025) GNU Image Manipulation Program (GIMP). Available from: https://www.gimp.org/ (accessed 26 May 2025)
  24. Krahl, D.R.P., Oliveira, M.S., Silva, J.B.F., Chiron, G. & Cantuária, P.C. (2023) Catasetum krahlii (Orchidaceae, Catasetinae): A new and threatened species from the Brazilian Amazon. Acta Botanica Brasilica 37: e20220258. https://doi.org/10.1590/1677-941x-abb-2022-0258
  25. Krahl, D.R.P., Schmal, P., Chiron, G., Silva, J.B.F., Krahl, A.H. & Cantuária, P.C. (2024) Catasetum queirozii (Orchidaceae: Catasetinae): A new species from the Brazilian Amazon. Acta Amazonica 54: e54bc23180. https://doi.org/10.1590/1809-4392202301801
  26. Lima, R.G.V.N., Swenson, U., Almeida Jr., E.B. & Zickel, C.S. (2024) Prieurella lenticellata sp. nov. (Sapotaceae), a new species from the Amazon rainforest. Acta Amazonica 54: e54bc23243. https://doi.org/10.1590/1809-4392202302431
  27. Luber, J., Cornejo, X., Carrijo, T.T. & Mansano, V.F. (2021) Three new species of Neocalyptrocalyx (Capparaceae) for South America. Systematic Botany 46: 852–862. https://doi.org/10.1600/036364421X16312067913598
  28. Magdalena, U.R., Silva, L.A.E., Lima, R.O., Bellon, E., Ribeiro, R., Oliveira, F.A., Siqueira, M.F. & Forzza, R.C. (2018) A new methodology for the retrieval and evaluation of geographic coordinates within databases of scientific plant collections. Applied Geography 96: 11–15. https://doi.org/10.1016/j.apgeog.2018.05.002
  29. Martins, A.B. (1989) Revisão taxonomia do gênero Marcetia DC. (Melastomataceae). Doctoral Dissertation. Universidade de Campinas, Campinas, Brazil.
  30. Melo, M.F.F., Daly, D.C., Santos, J.U.M. & Silva, K.C. (2021a) Three new species of Trattinnickia. Studies in Neotropical Burseraceae XXX. Brittonia 73: 343–352. https://doi.org/10.1007/s12228-021-09666-9
  31. Melo, L.R.F., Vasconcelos, T., Reginato, M., Caetano, A.P.S. & Brito, V.L.G. (2021b) Evolution of stamen dimetrism in Melastomataceae, a large radiation of pollen flowers. Perspectives in Plant Ecology, Evolution and Systematics 48: 125589. https://doi.org/10.1016/j.ppees.2021.125589
  32. Michelangeli, F.A., Goldenberg, R., Almeda, F., Judd, W.S., Bécquer, E.R., Ocampo, G., Ionta, G.M., Skean, Jr. J.D., Majure, L.C. & Penneys, D.S. (2019) Nomenclatural novelties in Miconia (Melastomataceae: Miconieae). Brittonia 71: 82–121. https://doi.org/10.1007/s12228-018-9546-0
  33. Pastore, M., Simão-Bianchini, R., Santos, D.A., Torres, D.S.C. & Viana, P.L. (2023) The discovery of a new species of Convolvulaceae: Dicranostyles yrypoana from the Brazilian Amazon Rainforest. Systematic Botany 48: 88–95. https://doi.org/10.1600/036364423X16758873924126
  34. Pilger, R. (1914) Plantae Uleanae novae vel minus cognitae. Rapateaceae. Notizblatt des Königl. botanischen Gartens und Museums zu Berlin-Dahlem 6: 119–120. https://doi.org/10.2307/3994293
  35. QGIS Development Team (2024) QGIS Geographic Information System. Version 3.42.2. Open Source Geospatial Foundation Project. Available from: https://www.qgis.org (accessed 5 March 2026)
  36. Ribeiro, J.E.L.S., Hopkins, M.J.G., Vicentini, A., Sothers, C.A., Costa, M.A.S., Brito, J.M., Souza, M.A.D., Martins, L.H.P., Lohmann, L.G., Assunção, P.A.C.L., Pereira, E.C., Silva, C.F., Mesquita, M.R. & Procópio, L.C. (1999) Flora da Reserva Ducke. Guia de identificação das plantas vasculares de uma floresta de terra firme na Amazônia Central. INPA-DFID, Manaus.
  37. Richard, A. (1824) CYCLANTHE. Cyclanthus. In: Audouin, Bourdon, I., Brongniart, A., Candole, A., Férussac, D., Deshayes, Desmoulins, A., Drapiez, Dumas, Edwards, Flourens, Saint-Hilaire, G., Guérin, Guillemin, Jussieu, A., Kunth, Lafosse, G., Lamouroux, Latreille, Lucas, Prévost, C., Richard, A. & Saint-Vincent, B. (Orgs.) Dictionnaire classique d’histoire naturelle. Vol. 5 [CRA–D]. Rey et Gravier & Baudouin Frèrer, Paris, pp. 221–222.
  38. Rocha, M.J.R., Guimarães, P.J.F., Michelangeli, F.A. & Batista, J.A.N. (2018) Taxonomy of Marcetieae: A new neotropical tribe of Melastomataceae. International Journal of Plant Sciences 179: 50–74. https://doi.org/10.1086/694932
  39. Silva, D.N., Braga, J.M.A., Afonso, E.A.L., Reinales, S., Cantuária, P.C., Rocha, M.J.R., Guimarães, E.F. & Guimarães, P.J.F. (2023) New records for different lineages of Melastomataceae in the Brazilian Amazon. Acta Amazonica 53: 336–346. https://doi.org/10.1590/1809-4392202300472
  40. Souza, V., da Silva, S.C.P., Lopes, M.C., Gonçalves, V.V.C., Pereira, C.F., Santiago, J.L. & Linhares, A.C.C. (2023) Pressão urbana sobre os fragmentos florestais: estudo de caso da área de proteção ambiental-APA Reserva Adolpho Ducke na cidade de Manaus–AM. Research, Society and Development 12: e18812340533. https://doi.org/10.33448/rsd-v12i3.40533
  41. Thiers, B. (2025) Index Herbariorum: A global directory of public herbaria and associated staff. Available from: https://sweetgum.nybg.org/science/ih/ (accessed 26 May 2025)
  42. Triana, J.J. (1872) [1871] Les Mélastomacées. The transactions of the Linnean Society of London 28: 1–188. https://doi.org/10.1111/j.1096-3642.1871.tb00222.x
  43. Wurdack, J.J. (1970) Erroneous data in Glaziou collections of Melastomataceae. Taxon 19: 911–913. https://doi.org/10.2307/1218309

How to Cite

Silva, D.N.D., Demarchi, L.O., Fernandes, G.E.A., Pastore, M. & Guimarães, P.J.F. (2026) Taxonomic notes on Aciotis (Melastomataceae) from the Brazilian Amazon: A new species and the updated distribution of Aciotis ferreirana, a rarely collected species. Phytotaxa 750 (2): 71–85. https://doi.org/10.11646/phytotaxa.750.2.1