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Issue: Vol. 755 No. 1: 7 May 2026
Type: Article
Published: 2026-05-07
DOI: 10.11646/phytotaxa.755.1.3
Page range: 58-72
Abstract views: 0
PDF downloaded: 0

Catasetum × ronaldoi: the first natural hybrid of the genus for the northeastern of Brazil and taxonomic notes for C. purum

Universidade Federal do Amapá, Programa de Pós-Graduação em Biodiversidade e Biotecnologia da Rede BIONORTE, 68903-419, Macapá, AP, Brazil
Program of Forest Ecology and Management, Albert Ludwig University of Freiburg, 79098, Freiburg, Germany
Université de Lyon 1, Herbiers, F-69622, Villeurbanne Cedex, France
Mineração Rio do Norte, 68275-000, Porto Trombetas, Oriximiná, PA, Brazil
Instituto Nacional de Pesquisas da Amazônia, Programa de Pós-Graduação em Botânica, 69060-001, Manaus, AM, Brazil
Instituto de Pesquisas Científicas e Tecnológicas do Estado do Amapá, Laboratório de Taxonomia Vegetal, 68903-970, Macapá, AP, Brazil
Caatinga Epiphyte Neotropics State of Bahia Taxonomy Monocots

Abstract

This article reports the first record of a Catasetum nothospecies in the Brazilian Northeast, more precisely in the state of Bahia. The proposed new entity is described and illustrated, and data related to its geographical distribution, its habitat and its phenology are given. From all observations the taxon is the product of a natural crossing between two species belonging to different morphological groups: C. blackii, characterized by a lip more open and fimbriate, and C. purum, which has a globular lip. As a natural hybrid the nothospecies presents a set of intermediate characters when compared to its probable parents, a point discussed in this article. We propose also an identification key to the Catasetum species occurring in Bahia. Besides, because the type material of C. purum could not be located, we propose as a lectotype the illustration published in the original description of the species.

References

  1. Arnold, M.L. (1992) Natural hybridization as an evolutionary process. Annual Review of Ecology and Systematics 23: 237–261. https://doi.org/10.1146/annurev.es.23.110192.001321
  2. Assis, L.C. & Ferreira, U.L.C. (2024) Um novo híbrido natural de Catasetum (Orchidaceae) descrito para o Brasil. Richardiana, nouvelle série 8: 1–7.
  3. Azevedo, C.O., Borba, E.L. & van den Berg, C. (2006) Evidence of natural hybridization and introgression in Bulbophyllum involutum Borba, Semir & F. Barros and B. weddellii (Lindl.) Rchb. f. (Orchidaceae) in the Chapada Diamantina, Brazil, by using allozyme markers. Brazilian Journal of Botany 29: 415–421. https://doi.org/10.1590/S0100-84042006000300008
  4. Barton, N.H. & Hewitt, G.M. (1989) Adaptation, speciation and hybrid zones. Nature 341: 497–503. https://doi.org/10.1038341497a0
  5. Bastos, C.A. & van den Berg, C. (2012) Flora da Bahia: Catasetum (Orchidaceae). Sitientibus série Ciências Biológicas 12: 83–89. https://doi.org/10.13102/scb113
  6. Beccari, O. (1916) Syagrus coronata. Agricoltura Coloniale 10: 466.
  7. BFG—The Brazil Flora Group. (2018) Brazilian Flora 2020: Innovation and collaboration to meet target 1 of the Global Strategy for Plant Conservation (GSPC). Rodriguésia 69: 1513–1527. https://doi.org/10.1590/2175-7860201869402
  8. BFG—The Brazil Flora Group. (2021) Brazilian Flora 2020: Leveraging the power of a collaborative scientific network. Taxon 71: 178–198. https://doi.org/10.1002/tax.12640
  9. Bicalho, H.D. (1996) Catasetum × fausti Bicalho – Orquidaceae, um novo híbrido natural. Revista Brasileira de Horticultura Ornamental 2: 65–65.
  10. Bicalho, H.D. & Barros, F. (1998) On the taxonomy of Catasetum subsection Isoceras. Lindleyana 3: 87–92.
  11. Braga, P.I.S. (1978) Estudos da flora orquidológica do Estado do Amazonas. III-X Brassocattleya rubyi Braga (Orchidaceae) híbrido natural novo da flora amazônica. Acta Amazonica 8: 371–378. https://doi.org/10.1590/1809-43921978083371
  12. Calderón-Álvarez, R.A. & Bonilla-Morales, M.M. (2023) A new species of Catasetum (Cymbidieae: Catasetinae) from the Colombian Amazonia. Lankesteriana 23: 469–475. https://doi.org/10.15517/lank.v23i3.54462
  13. Campacci, M.A. & Carr, G.F. (2010) Catasetum deusvandoi. Coletânea de Orquídeas Brasileiras 8: 270–273.
  14. Campacci, M.A. & Carr, G.F. (2011) Catasetum joaquinianum. Coletânea de Orquídeas Brasileiras 9: 320–323.
  15. Canhos, D.A.L., Almeida, E.A., Assad, A.L., Cunha-Bustamante, M.M.D., Canhos, V.P., Chapman, A.D., Giovanni, R.D., Imperatriz-Fonseca, V.L., Lohmann, L.G., Maia, L.C., Miller, J.T., Nelson, G., Peterson, A.T., Pirani, J.R., Souza, S., Stehmann, J.R. & Thiers, B. (2022) SpeciesLink: Rich data and novel tools for digital assessments of biodiversity. Biota Neotropica 22: 1–15. https://doi.org/10.1590/1676-0611-BN-2022-1394
  16. Cantuária, P.C., Krahl, D.R.P., Krahl, A.H., Chiron, G. & Silva, J.B.F. (2021) Catasetum × sheyllae (Orchidaceae: Catasetinae), a new natural hybrid from Brazilian Amazon. Phytotaxa 527: 257–265. https://doi.org/10.11646/phytotaxa.527.4.3
  17. Castro-Neto, V.P. & Carr, G. (2009) Un novel hybride naturel de Catasetum (Orchidaceae) de l’Etat de São Paulo. Richardiana 9: 198–203.
  18. Chiron, G. & Marçal, S. (2017) Une nouvelle espèce de Catasetum (Orchidaceae) de Bahia (Brésil). Richardiana, nouvelle série 1: 7–16.
  19. Cogniaux, C.A. (1904) Orchidaceae, LXII. Catasetum, 18. Catasetum purum. In: von Martiu, C.F.P., Eichler, A.W., & Urban, I. (Orgs.) Flora Brasiliensis, vol. 3, part 5. Typographia Regia, Monachi, pp. 410–412.
  20. Dressler, R.L. (1993) Phylogeny and Classification of the Orchid Family. Dioscorides Press, Portland, 314 pp.
  21. EOL (2026) Encyclopedia of Life. Available from: https://www.eol.org/ (accessed 7 January 2026)
  22. Ferreira, U.L.C. (2013) Catasetum × valdisonianum U.L.C. Ferreira, um novo híbrido natural. Orquidário 27: 93–97.
  23. Ferreira, U.L.C. (2016) Catasetum × mesquitae U.L.C. Ferreira, novo híbrido natural. Orquidário 30: 37–43.
  24. Ferreira, U.L.C. (2019) Two new natural hybrids in Catasetum (Orchidaceae) from Centre-West Brazil. Richardiana, nouvelle série 3: 80–91.
  25. Ferreira, U.L.C. & Filho, R.M.C. (2019) Two new natural hybrids in Catasetum (Orchidaceae) from Brazil. Richardiana, nouvelle série 3: 39–49.
  26. Ferreira, U.L.C. & Malaspina, T.K. (2019) Catasetum × aikoae U.L.C.Ferreira & T.K.Malaspina hyb. nat. nov. Coletânea de Orquídeas Brasileiras 15: 594–597.
  27. Ferreira, U.L.C. & Malaspina, T.K. (2023a) Catasetum × incarnatum U.L.C.Ferreira & T.K.Malaspina hyb. nat. nov. Coletânea de Orquídeas Brasileiras 19: 770–773.
  28. Ferreira, U.L.C. & Malaspina, T.K. (2023b) Catasetum × ornaghiae U.L.C.Ferreira & T.K.Malaspina hyb. nat. nov. Coletânea de Orquídeas Brasileiras 19: 774–777.
  29. GBIF (2026) Global Biodiversity Information Facility. Available from: https://www.gbif.org (accessed 7 January 2026)
  30. Gonçalves, E.G. & Lorenzi, H. (2007) Morfologia Vegetal: Organografia e Dicionário Ilustrado de Morfologia das Plantas Vasculares. Instituto Plantarum de Estudo da Flora, São Paulo, 416 pp.
  31. Harris, J. & Harris, M. (2001) Plant identification terminology – an illustrated glossary. Spring Lake Publishing, Payson, 216 pp.
  32. Harrison, R.G. (1990) Hybrid zones: windows on an evolutionary process. Oxford Surveys in Evolutionary Biology 7: 69–128. https://doi.org/10.1093/oso/9780195069174.001.0001
  33. Hoehne, F.C. (1942) Orchidaceae, 103 – Catasetum L. C. Rich., 44 – C. purum Nees & Sinnings. In: Hoehne, F.C. (Org.) Flora Brasílica, vol. XII, VI. Secretaria da Agricultura, Indústria e Comércio de São Paulo, São Paulo, pp. 110, tab. 74.
  34. Holst, A.W. (1999) The world of Catasetums. Timber Press, Portland, 560 pp.
  35. Hooker, W.J. (1826) Catasetum semiapertum. Exotic Flora 3: t. 213.
  36. IPNI (2026) International Plant Names Index. Available from: https://www.ipni.org/ (accessed 7 January 2026)
  37. Krahl, D.R.P., Krahl, A.H. & Chiron, G. (2020) Catasetum × louisiae (Orchidaceae: Catasetinae), a new natural hybrid for the Brazilian Amazon. Richardiana, nouvelle série 4: 214–223.
  38. Krahl, A.H., Krahl, D.R.P. & Pansarin, E.R. (2021a) Ionopsis × atalibae (Orchidaceae, Oncidiinae), a new natural hybrid from the Brazilian Amazon. Phytotaxa 478: 268–274. https://doi.org/10.11646/phytotaxa.478.2.8
  39. Krahl, A.H., Krahl, D.R.P., Cantuária, P.C. & Silva, J.B.F. (2021b) Catasetum saracataquerense (Orchidaceae, Catasetinae), a new species of Brazilian Amazon. Richardiana, nouvelle série 5: 206–216.
  40. Krahl, A.H., Chiron, G., Cantuária, P.C. & Silva, J.B.F. (2021c) A new species of Catasetum (Orchidaceae, Catasetinae) for the Brazilian Amazon. Richardiana, nouvelle série 5: 283–294.
  41. Krahl, D.R.P., Krahl, A.H., Cantuária, P.C. & Silva, J.B.F. (2022a) Catasetum nhamundaense (Orchidaceae: Catasetinae), uma nova espécie da Amazônia Brasileira. Orquidário 36: 24–36.
  42. Krahl, A.H., Krahl, D.R.P., Cantuária, P.C., Chiron, G. & Silva, J.B.F. (2022b) Catasetum marinhoi (Orchidaceae, Catasetinae), a new species of Brazilian Amazon. Richardiana nouvelle série 6: 100–110.
  43. Krahl, D.R.P., Schmal, P., Chiron, G., Silva, J.B.F., Krahl, A.H. & Cantuária, P.C. (2023a) Catasetum × grasineideae (Orchidaceae: Catasetinae), a new nothospecies from Brazilian Amazon and taxonomic notes for the genus. Phytotaxa 594: 89–104. https://doi.org/10.11646/phytotaxa.594.2.1
  44. Krahl, D.R.P., Oliveira, M.S., Silva, J.B.F., Chiron, G. & Cantuária, P.C. (2023b) Catasetum krahlii (Orchidaceae, Catasetinae): a new and threatened species from the Brazilian Amazon. Acta Botanica Brasílica 37: e20220258. https://doi.org/10.1590/1677-941X-ABB-2022-0258
  45. Krahl, D.R.P., Chiron, G., Silva, J.B.F., Krahl, A.H. & Cantuária, P.C. (2023c) Catasetum dianneae (Orchidaceae, Catasetinae): a new species of the C. barbatum complex for the Brazilian Amazon. Richardiana nouvelle série 7: 187–201.
  46. Krahl, D.R.P., Krahl, A.H., Silva, J.B.F. & Cantuária, P.C. (2023d) Catasetum riosianum (Orchidaceae: Catasetinae), a new species for the Brazilian Amazon. Biota Amazônia 13: 56–58.
  47. Krahl, D.R.P., Schmal, P., Chiron, G., Silva, J.B.F., Krahl, A.H. & Cantuária, P.C. (2023e) Taxonomic notes on Catasetum meeae (Orchidaceae: Catasetinae). Phytotaxa 609: 240–246. https://doi.org/10.11646/phytotaxa.609.3.7
  48. Krahl, D.R.P., Oliveira, M.S., Schmal, P., Chiron, G., Krahl, A.H., Silva, J.B.F. & Cantuária, P.C. (2024a) Revealing the true taxonomic status of Catasetum joaquinianum (Orchidaceae: Catasetinae). Phytotaxa 664: 123–131. https://doi.org/10.11646/phytotaxa.664.2.4
  49. Krahl, D.R.P., Oliveira, M.S., Schmal, P., Krahl, A.H., Chiron, G., Silva, J.B.F. & Cantuária, P.C. (2024b) Catasetum × vilhenense (Orchidaceae: Catasetinae), a new natural hybrid from the Amazon Forest. Darwiniana, Nueva Serie 12: 308–317. https://doi.org/10.14522/darwiniana.2024.122.1251
  50. Krahl, D.R.P., Schmal, P., Oliveira, M.S., Silva, J.B.F., Chiron, G. & Krahl, A.H. (2024c) Catasetum cantuariae (Orchidaceae, Catasetinae), a new species from the Brazilian Amazonian biome. Kew Bulletin 79: 583–595. https://doi.org/10.1007/s12225-024-10191-7
  51. Krahl, D.R.P., Schmal, P., Chiron, G., Silva, J.B.F., Krahl, A.H. & Cantuária, P.C. (2024d) Catasetum queirozii (Orchidaceae: Catasetinae): a new species from the Brazilian Amazon. Acta Amazonica 54: e54bc23180. https://doi.org/10.1590/1809-4392202301801
  52. Krahl, D.R.P., Oliveira, M.S., Schmal, P., Silva, J.B.F., Chiron, G., Krahl, A.H. & Cantuária, P.C. (2025a) Catasetum ×angelae (Orchidaceae: Catasetinae), a new nothospecies from the Brazilian Amazon in the subgenus Pseudocatasetum, and taxonomic notes for C. pusillum. New Zealand Journal of Botany 63: 1347–1366. https://doi.org/10.1080/0028825X.2025.2469623
  53. Krahl, D.R.P., Schmal, P., Chiron, G., Silva, J.B.F., Oliveira, M.S., Krahl, A.H. & Cantuária, P.C. (2025b) Catasetum ×abreuanum (Orchidaceae, Catasetinae), a new nothospecies from the Brazilian Amazon belonging to the C. cristatum complex. Botany Letters 172: 340–350. https://doi.org/10.1080/23818107.2025.2486760
  54. Krahl, D.R.P., Oliveira, M.S., Schmal, P., Silva, J.B.F., Chiron, G., Krahl, A.H. & Cantuária, P.C. (2025c) Catasetum × humaitaense (Orchidaceae: Catasetinae), a new nothospecies from the Brazilian Amazon. Biota Colombiana 26: 1–14. https://doi.org/10.21068/2539200X.1263
  55. Krahl, D.R.P., Schmal, P., Oliveira, M.S., Silva, J.B.F., Chiron, G., Krahl, A.H. & Cantuária, P.C. (2025d) Catasetum × luanae (Orchidaceae, Catasetinae): a new nothospecies from the Brazilian Central Amazon. Acta Biológica Colombiana 30: 55–65. https://doi.org/10.15446/abc.v30n3.116694
  56. Krahl, D.R.P., Schmal, P., Chiron, G., Silva, J.B.F., Krahl, A.H. & Cantuária, P.C. (2025e) Catasetum binarum (Orchidaceae: Catasetinae): a new species from the Brazilian Amazon. Richardiana, nouvelle série 9: 43–60. https://doi.org/10.22541/au.175974494.45793760/v1
  57. Kunth, K.S. (1822) Catasetum. Synopsis Plantarum 1: 330–331.
  58. Lacerda, K.G. (1998) Estudos em Catasetinae (Orchidaceae), Complexo C. Cristatum Lindl. - 1. Bradea 8: 88–96.
  59. Lacerda, K.G. & Castro-Neto, V.P. (2005) New natural hybrids in Catasetum. Orchid Review 113: 308–311.
  60. Lacerda, K.G. & Silva, J.B.F. (1998) Catasetum maranhense Lacerda & da Silva sp. nov. Bradea 13: 69–72.
  61. Lindley, J. (1824) Catasetum cristatum. Transaction of the Horticultural Society of London 6: 83.
  62. Lindley, J. (1825) Catasetum hookeri. Botanical Register 10: sub t. 840.
  63. Lindley, J. (1836) Myanthus barbatus. Edwards's Botanical Register 21: t. 1778.
  64. Lindley, J. (1841) Catasetum lanciferum. Edwards's Botanical Register 27: 5.
  65. Lindley, J. (1844) Catasetum barbatum. Edwards's Botanical Register 30: Misc. 28, n. 36.
  66. Martius, C.F.P. (1826) Cocos coronata. Historia Naturalis Palmarum 2: 115.
  67. Mauad, A.V.S.R., Petini-Benelli, A., Izzo, T.J. & Smidt, E.C. (2022) Phylogenetic and molecular dating analyses of Catasetum (Orchidaceae) indicate a recent origin and artificial subgeneric groups. Brazilian Journal of Botany 45: 1235–1247. https://doi.org/10.1007/s40415-022-00840-1
  68. Milet-Pinheiro, P. & Gerlach, G. (2017) Biology of the Neotropical orchid genus Catasetum: A historical review on floral scent chemistry and pollinators. Perspectives in Plant Ecology Evolution and systematics 27: 23–24. https://doi.org/10.1016/j.ppees.2017.05.004
  69. Mori, S.A., Silva, L.A., Lisboa, G. & Coradin, L. (1989) Manual de Manejo do Herbário Fanerogâmico. Ceplac, Ilhéus, 104 pp.
  70. Nees, C.G.D. & Nees, T.F.L. (1824) Catasetum purum. Plantarum, in Horto Medico Bonnensi Nutritarum, Icones Selectae 1–4: t. 1A, a–r.
  71. Oliveira, A.T. & Silva, J.B.F. (2000) Catasetum rigidum, Catasetum bifidum e Catsetum palmeirinhense: novas espécies de Orchidaceae para o Estado do Maranhão, Brasil. Boletim do Museu Paraense Emílio Goeldi, série Botânica 16: 151–161.
  72. Pabst, G.F.J. (1964) Catasetum blackii. Anais do Congresso da Sociedade de Botânica do Brasil 14: 21.
  73. Pabst, G.F.J. (1975) New or Critical Orchids from Brazil – VII. Orchid Review 83: 404–406.
  74. Pessoa, E.M. & Alves, M. (2011) Orchidaceae Juss. na Serra de Itabaiana, Sergipe, Brasil. Revista Caatinga 24: 102–114.
  75. Pessoa, E.M., Araújo, A.M., Barberena, F.F.V.A., Batista, J.A.N., Benelli, A.P., Bento, J.S.P., Borba, E.L., Camelo-Júnior, A.E., Cantuária, P.C., Cavalcanti, L.W., Cintra, M.C.S., Engels, M., Feitoza, L.H.J., Felix, L.P., Ferreira, A.W.C., Fiorini, C.F., Guimarães, L.R.S., Klein, V.P., Koch, A.K., Koehler, S., Krahl, A.H., Krahl, D.R.P., Leal, B.S.S., Macedo, A., Machado, I.C.S., Mauad, A.V.S.R., Mayer, J.L.S., Meneguzzo, T.E.C., Menini Neto, L., Moraes, A.P., Milet-Pinheiro, P., Nollet, F., Oliveira, E.M., Oliveira, M.S., Pansarin, E.R., Pinheiro, F., Royer, C.A., Santos, I.S., Silva-Pereira, V., Smidt, E.C., Vieira, T.L., Zandoná, L.R., Zavatin, D. & van den Berg, C. (2025) An overview of Orchidaceae from Brazil: advances and shortfalls after 400 years of studies. Plants 14: 3520. https://doi.org/10.3390/plants14223520
  76. Petini-Benelli, A. & Grade, A. (2010) Novo Híbrido Natural de Catasetum L.C. Rich. ex Kunth (Orchidaceae) para o Norte de Mato Grosso, Brasil. Orquidário 24: 124–132.
  77. Petini-Benelli, A. & Grade, A. (2012) Catasetum apolloi Benelli & Grade (Orchidaceae): correction taxinomique. Richardiana 12: 153–157.
  78. Petini-Benelli, A. (2014) Novelties in Catasetum (Orchidaceae) in the State of Rondônia, Brazil. Feddes Repertorium 125: 1–11. https://doi.org/10.1002/fedr.201400028
  79. Petini-Benelli, A. (2016a) Un novel hybride naturel de Catasetum (Cymbidieae, Epidendroideae, Orchidaceae) du Mato Grosso (Brésil). Richardiana 16: 327–342.
  80. Petini-Benelli, A. (2016b) Herborização de Orchidaceae com pseudobulbos espessados. Revista em Agronegócios e Meio Ambiente 9: 935–948. https://doi.org/10.17765/2176-9168.2016v9n4p935-948
  81. Petini-Benelli, A. & Chiron, G. (2020) Une nouvelle espèce d’orchidée du Rôndonia: Catasetum desouzae. Richardiana, nouvelle série 4: 238–246.
  82. Petini-Benelli, A. (2026) Catasetum. In: Flora e Funga do Brasil 2020. Jardim Botânico do Rio de Janeiro, JBRJ. Available from: http://floradobrasil.jbrj.gov.br/reflora/floradobrasil/FB11312 (accessed 7 January 2026)
  83. POWO. (2026) [continuously updated] Plants of the World Online. Royal Botanic Gardens, Kew. Available from: http://www.plantsoftheworldonline.org/ (accessed 7 January 2026)
  84. QGIS Development Team. (2026) QGIS geographic information system. Version 3.44.7 “Solothurn”. Open source geospatial foundation project. Available from: https://qgis.org/en/site/ (accessed 27 January 2026)
  85. REFLORA (2026) Herbário Virtual REFLORA. Available from: https://floradobrasil.jbrj.gov.br/reflora/herbarioVirtual/ConsultaPublicoHVUC/ConsultaPublicoHVUC.do (accessed 16 Apil 2026)
  86. Romero-González, G.A. & Carnevali, G. (1989a) A new combination for the orchid flora of southern Venezuela: Catasetum ×tapiriceps Reichb.F. (Pro SP.). Lindleyana 4: 127–134.
  87. Romero-González, G.A. & Carnevali, G. (1989b) Novelties in the orchid flora of Southern Venezuela. Annals of the Missouri Botanical Garden 76: 454–461. https://doi.org/10.2307/2399494
  88. Romero-González, G.A. & Carnevali, G. (1990) Catasetum natural hybrids from southern Venezuela – 1. Catasetum ×tapiriceps Reichb. f. American Orchid Society Bulletin 59: 1214–1220.
  89. Romero-González, G.A. & Carnevali, G. (1991a) Catasetum natural hybrids from southern Venezuela – 2. Catasetum ×dunstervillei G. Romero & Carnevali. American Orchid Society Bulletin 60: 115–120.
  90. Romero-González, G.A. & Carnevali, G. (1991b) Catasetum natural hybrids from southern Venezuela – 3. Catasetum ×roseo-album (Hook.) Lindley and C. wendlingeri Foldats. American Orchid Society Bulletin 60: 770–774.
  91. Romero-González, G.A. & Carnevali, G. (1992) Catasetum natural hybrids from southern Venezuela – IV. Biology and nomenclature. American Orchid Society Bulletin 61: 334–360.
  92. Romero, G.A. & Carnevali, G. (2009) Catasetum. In: Pridgeon, A.M., Cribb, P.J., Chase, M.W. & Rasmussen, F.N. (Eds.) Genera Orchidearum, Epidendroidea – Part II. Oxford University Press, New York, pp. 13–18.
  93. Romero-González, G.A. & Carnevali, G. (2024) Catasetum ×steyermarkii (Catasetinae: Orchidaceae) - a new putative natural hybrid of Catasetum (Catasetinae, Orchidaceae) from the Venezuelan Guayana. Harvard Papers in Botany 29: 1–13. https://doi.org/10.3100/hpib.v29iss1.2024.n1
  94. Romero-González, G.A. & Jenny, R. (1992) New natural hybrids and nomenclatural novelties in Catasetum (Orchidaceae) from the Guianas, Ecuador, and Peru. Novon 2: 241–248. https://doi.org/10.2307/3391560
  95. Romero-González, G.A. & Jenny, R. (1993) Contributions toward a monograph of Catasetum (Catasetinae, Orchidaceae) I: A checklist of species, varieties, and natural hybrids. Harvard Papers in Botany 1: 59–84.
  96. Schoch, C.L., Ciufo, S., Domrachev, M., Hotton, C.L., Kannan, S., Khovanskaya, R., Leipe, D., Mcveigh, R., O’Neill, K., Robbertse, B., Sharma, S., Soussov, V., Sullivan, J.P., Lu Sun, Turner, S. & Karsch-Mizrachi, I. (2020) NCBI Taxonomy: a comprehensive update on curation, resources and tools. Database (Oxford) 2020: 1–21. https://doi.org/10.1093/database/baaa062
  97. Senghas, K. (1990) Einige neue Arte naus der Subtribus Catasetinae I – Catasetum sektion Anisoceras. Die Orchidee 41: 212–218.
  98. Senghas, K. (1991) Einige neue Arte naus der Subtribus Catasetinae II – Catasetum sektion Isoceras. Die Orchidee 42: 19–24.
  99. Silva, L.A.E., Fraga, C.N., Almeida, T.M.H., Gonzalez, M., Lima, R.O., Rocha, M.S., Bellon, E., Ribeiro, E.S., Oliveira, F.A., Clemente, L.S., Magdalena, U.R., Medeiro, E.S.M. & Forzza, R.C. (2017) Jabot—Sistema de Gerenciamento de Coleções Botânicas: a experiência de uma década de desenvolvimento a avanços. Rodriguésia 68: 391–410. https://doi.org/10.1590/2175-7860201768208
  100. Silva, M.F.F. & Oliveira, A.T. (1999) Catasetum seccoi, Catasetum carrenhianum e Catasetum albuquerquei: novas espécies de Orchidaceae para o Estado do Maranhão, Brasil. Boletim do Museu Paraense Emílio Goeldi, série Botânica 15: 105–115.
  101. Thiers, B.M. (ed.) (2026) [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/ih/ (accessed 7 January 2026)
  102. Turland, N.J., Wiersema, J.H., Barrie, F.R., Gandhi, K.N., Gravendyck, J., Greuter, W., Hawksworth, D.L., Herendeen, P.S., Klopper, R.R., Knapp, S., Kusber, W.-H., Li, D.-Z., May, T.W., Monro, A.M., Prado, J., Price, M.J., Smith, G.F. & Zamora Señoret, J.C. (2025) Código Internacional de Nomenclatura para algas, hongos y plantas. VI edición en español (Código de Madrid). Occasional papers from the Herbarium Greuter, 6. Berlín: Stiftung Herbarium Greuter. https://doi.org/10.7320/codigo.de.madrid.V2
  103. Valsko, J.J., Krahl, A.H., Petini-Benelli, A. & Chiron, G. (2019) Catasetum sophiae, a new species of Orchidaceae from northern Brazil. Phytotaxa 402: 104–120. https://doi.org/10.11646/phytotaxa.402.2.5
  104. Walker-Larsen, J. & Harder, L.D. (2000) The evolution of staminodes in Angiosperms: patterns of stamen reduction, loss, and functional re-invention. American Journal of Botany 87: 1367–1384. https://doi.org/10.2307/2656866
  105. WFO (2026) World Flora Online. Available from: https://wfoplantlist.org/ (accessed 7 January 2026)

How to Cite

Krahl, D.R.P., Schmal, P., Chiron, G., Silva, J.B.F.D., Krahl, A.H. & Cantuária, P.D.C. (2026) Catasetum × ronaldoi: the first natural hybrid of the genus for the northeastern of Brazil and taxonomic notes for C. purum. Phytotaxa 755 (1): 58–72. https://doi.org/10.11646/phytotaxa.755.1.3