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Issue: Vol. 704 No. 1: 4 Jun. 2025
Type: Article
Published: 2025-06-04
DOI: 10.11646/phytotaxa.704.1.5
Page range: 60-68
Abstract views: 217
PDF downloaded: 11

Sida antonioi: a new species of Sida sect. Malacroideae (Malvoideae, Malvaceae)

Universidade de Mogi das Cruzes, Núcleo de Ciências Ambientais, Laboratório de Sistemática Vegetal, Avenida Cândido Xavier de Almeida e Souza, Centro Cívico, 200, 08780-911, São Paulo, Brazil
Universidade de São Paulo, Instituto de Biociências, Departamento de Botânica, Rua do Matão, Butantã, São Paulo, 05508-090, Brazil
Universidade de Mogi das Cruzes, Núcleo de Ciências Ambientais, Laboratório de Sistemática Vegetal, Avenida Cândido Xavier de Almeida e Souza, Centro Cívico, 200, 08780-911, São Paulo, Brazil
Atlantic rain forest Endemism Southeast Region Taxonomy Eudicots

Abstract

We describe Sida antonioi, a new species of Sida sect. Malacroideae, based on herbarium specimens and in situ observations. Previously misidentified as other species within the section, S. antonioi is distinguished by its dimorphic stipules on the stem, apical inflorescence, calyx with long yellow simple trichomes on the lobe apex, and non-muricate mericarps. The species is endemic to the Atlantic Forest biome in southeastern Brazil. We provide a detailed taxonomic description, a geographic distribution map, and a preliminary conservation assessment. Additionally, we compare its diagnostic characters with those of three morphologically similar and geographically proximate species within Sida sect. Malacroideae.

References

  1. Aguilar, J.F., Fryxell, P.A. & Jansen, R.K. (2003) Phylogenetic Relationships and Classification of the Sida Generic Alliance (Malvaceae) Based on nrDNA ITS Evidence. Systematic Botany 28 (2): 352–364.
  2. Bachman, S., Moat, J., De la Torre, J. & Scott, B. (2011) Supporting Red List threat assessments with GeoCAT: Geospatial conservation assessment tool. In e-Infrastructures for data publishing in biodiversity Science. Zookeys 150: 117–126. https://doi.org/10.3897/zookeys.150.2109
  3. Baker, E.G. (1892) Synopsis of genera and species of Malveae. Journal of Botany, British and Foreign 30 (353): 137–138.
  4. Baum, D.A., Smith, S.D., Yen, A., Alverston, W.S., Nyfeler, R., Whitlock, A. & Oldham, R. (2004) Phylogenetic relationship of Malvatheca (Bombacoideae and Malvoideae; Malvaceae sensu lato) as inferred from plastid DNA sequences. American Journal of Botany 91 (11): 1863–1871. https://doi.org/10.3732/ajb.91.11.1863
  5. Bayer, C., Fay, M.F., De Bruijin, A.Y., Savolainen, V., Morton, C.M., Kubitzki, K., Alverson, W.S. & Chase, M.W. (1999) Support for an expanded family concept of Malvaceae within a recircunscribed order Malvales: a combined analysis of plastid atpB and rbcL DNA sequences. Botanical Journal of the Linnean Society 129 (4): 267–303. https://doi.org/10.1111/j.1095–8339.1999.tb00505.x
  6. Borssum Waalkes, J.V. (1966) Blumea. Rijksherbarium, Leiden, 180 pp.
  7. Bovini, M.G. (2022) Resurrection, lectotypification and synonymy of Sida hassleri (Malvoideae: Malvaceae): a new record of occurrence for Brazil. Kew Bulletin 77: 239–244. https://doi.org/10.1007/s12225–021–09998–5
  8. Cavanilles, A.J. (1785) Monadelphiae Classis Dissertationes Decem. F.A. Didot, Paris, 570 pp.
  9. Clement, I.D. (1957) Studies in Sida (Malvaceae). Contributions from the Gray Herbarium of Harvard University 180: 5–91.
  10. Colli-Silva, M., Pérez-Escobar, O.A., Ferreira, C.D.M., Costa, M.T.R., Gerace, S., Coutinho, T.S., Yoshikawa, V.N., Antonio-Domingues, H., Hernández-Gutiérrez, R., Bovini, M.G., Duarte, M.C., Cheek, M., Chase, M.W., Fay, M.F., Christenhusz, M.J.M., Dorr, L.J., Schoeplein, C., Corcoran, M., Roy, S., Cable, S., McLay, T., Maurin, O., Forest, F., Baker, W.J. & Antonelli, A. (2025) Taxonomy in the light of incongruence: An updated classification of Malvales and Malvaceae based on phylogenomic data. Taxon 74: 1–25. https://doi.org/10.1002/tax.13300
  11. Don, G. (1831) A general history of the dichlamydeous plants (vol. 1). J.G. and F. Rivington, London, 818 pp.
  12. Figueiredo, S.S. (2020) Sida L. sect. Malacroideae G. Don (Malvaceae, Malvoideae) nas caatingas do nordeste brasileiro. Dissertação de Mestrado – Ecologia Vegetal. 2020, 99 pp.
  13. Figueiredo, S.S., Melo, J.A.M. (2021) A new species of Sida section Malacroideae (Malvaceae, Malvoideae) from northeastern Brazil. Harvard Papers in Botany 26 (1): 105–109. https://doi.org/10.3100/hpib.v26iss1.2021.n5
  14. Fryxell, P.A. (1971) A new genus from Mexico: Dendrosida (Malvaceae). Brittonia 23: 231–237.
  15. Fryxell, P.A. (1978) Neotropical Segregates from Sida L. (Malvaceae). Brittonia 30 (4): 447–462.
  16. Fryxell, P.A. (1985) Sidus Sidarum – V the north and central american species of Sida. SIDA, Contribuitions to Botany 11 (1): 62–91.
  17. Fryxell, P.A. & Fuertes, J. (1992) A Re-Evaluation of the Abutilothamnus Complex (Malvaceae) I. Two New Species and Two New Genera, Sidasodes and Akrosida. Brittonia 44: 436–447.
  18. Fryxell, P.A. (1997) The American Genera of Malvaceae–II. Brittonia 49 (2): 204–269. https://doi.org/10.2307/2807683
  19. Gonçalvez, E.G. & Lorenzi, H. (2011) Morfologia Vegetal: organografia e dicionário ilustrado de morfologia das plantas vasculares. Instituto Plantarum de Estudos da Flora LTDA, São Paulo, 546 pp.
  20. Grisebach, A.H.R. (1864) Flora of the British West Indian Islands. Lovell, Reeve & Co., London, 806 pp.
  21. IUCN—International Union for Conservation of Nature (2024) Guidelines for using the IUCN Red List Categories and Criteria, version 16. Prepared by the Standards and Petitions Committee. Available from: http://www.iucnredlist.org/documents/RedList Guidelines.pdf (accessed 26 May 2023)
  22. Keller, H.A. (2021) Sida krapovickasii (Malvaceae), nueva especie de la sección Nelavaga. Bonplandia 30 (2): 129–135. https://doi.org/10.30972/bon.3024852
  23. Jaubert, H.F. & Spach, E. (1855) Illustrationes Plantarum Orientalium. Vol. 5.
  24. Krapovickas, A. (2003) Sida sección Distichifolia (Monteiro) Krapov. comb, nov., stat. nov. (Malvaceae-Malveae). Bonplandia 12: 86–121. https://doi.org/10.30972/bon.121-41407
  25. Krapovickas, A. (2007) Las espécies de Sida secc. Malacroideae (Malvaceae) del cono sur de Sudamérica. Bonplandia 16 (3–4): 209–253.
  26. Krapovickas, A. (2012) Novedades em las secciones Cordifoliae, Distichifolia, Malacroidea, Multicae y Nelavaga del género Sida (Malvaceae). Bonplandia 21 (1): 77–92.
  27. León, B. (1919) A new Cuban Sida. Torreya 19: 172–173.
  28. Linneus, C.V. (1753) Species plantarum (vol. 2). Impensis Laurentii Salvii, Holmiae, pp. 561–1200. https://doi.org/10.5962/bhl.title.669
  29. Linnaeus, C.V. (1759) Systema Naturae per Regna Tria Naturae, Secundum Classes, Ordines, Genera, Species, cum Characteribus, Differentiis, Synonymis, Locis (vol. 2). 10th edition. Holmiae: Laurentii Salvii. https://doi.org/10.5962/bhl.title.542
  30. Miller, P. (1754) The Gardeners Dictionary (vol. 1). 4th edition. John & James Rivington Brothers, London.
  31. Presl, C.B. (1835) Reliquiae Haenkeanae (vol. 2). Apud J.G. Calve, Pragae, 152 pp.
  32. QGIS.org (2024) QGIS Geographic Information System. QGIS Association. Available from: https://www.qgis.org (accessed 5 April 2024)
  33. Rizzini, C.T. (1997) Tratado de fitogeografia do Brasil: aspectos ecológicos, sociológicos e florísticos. 2. ed. Rio de Janeiro: Âmbito Cultural Edições Ltda.
  34. Roxburgh, W. (1832) Flora Indica (vol. 3). 2nd edition. Serampore: Mission Press, 170 pp.
  35. Saint-Hilaire, A., Cambessèdes, J. & Kunth, C.S. (1825) Flora Brasiliae Meridionalis (vol. 1, part. 4). 4th edition. Paris: Laurentii Regency, 140 pp., pl. 33.
  36. The Plant List (2024) Published on the internet. Available from: http://www.theplantlist.org/ (accessed 20 June 2024)
  37. Vollessen, K. (1986) The Sida cuneifolia–complex (Malvaceae) in Africa. Kew Bulletin 41 (1): 91–98.
  38. Yoshikawa, V.N., Duarte, M.C. & Gonçalez, V.M. (2019) Sida uniaristata, a New Species of Sida sect. Sidae L. (Malvaceae, Malvoideae) from Brazil. Systematic Botany 44 (1): 184–188. https://doi.org/10.1600/036364419X698001

How to Cite

Camargo, R.P., Yoshikawa, V.N. & Duarte, M.C. (2025) Sida antonioi: a new species of Sida sect. Malacroideae (Malvoideae, Malvaceae). Phytotaxa 704 (1): 60–68. https://doi.org/10.11646/phytotaxa.704.1.5