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Issue: Vol. 702 No. 2: 27 May 2025
Type: Article
Published: 2025-05-27
DOI: 10.11646/phytotaxa.702.2.4
Page range: 166-174
Abstract views: 104
PDF downloaded: 10

Mesosetum aureum (Poaceae: Paspaleae: Arthropogoninae), an annual new species with reddish golden trichomes from the northern South America

Current Address: Department of Biosciences, Federal Rural University of the Semi-Arid Region, Mossoró, RN, Brazil, CEP 59.625-900
Departamento de Fitotecnia, Universidade Federal do Ceará, Campus do Pici, Fortaleza, CE, Brazil, CEP 60356-000
Royal Botanic Gardens, Kew, Richmond, Surrey, United Kingdom, TW9 3AE
Embrapa Recursos Genéticos e Biotecnologia, Parque Estação Biológica - PqEB, Brasília, DF, Brazil, CEP 70770-917
Post-graduate Program in Botany, University of Brasília, Campus Darcy Ribeiro, Brasília, DF, Brazil, CEP 70910-900
Amazon rainforest Guiana Amazonian Park Neotropics Gramineae Monocots

Abstract

A new species, Mesosetum aureum, is here described and illustrated. It is an annual species morphologically related to M. cayennense and M. rottboellioides, but can be recognized by the size of racemes and pedicels, size and pilosity of glumes, and length of lower lemma and upper anthecium. It is found in rocky savannas and humid areas of French Guiana, locally called Inselbergs. Micromorphology of the upper anthecium, conservation status, and comparisons with similar species are provided.

References

  1. 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
  2. Barbosa-Silva, R.G., Andrino, C.O., Azevedo, L., Lucresia, L., Lovo, J., Hiura, A.L., Viana, P.L., Giannini, T.C. & Zappi, D.C. (2022) A wide range of South American inselberg floras reveal cohesive biome patterns. Frontiers in Plant Science 13: 1–15. https://doi.org/10.3389/fpls.2022.928577
  3. Butzin, F. (1972) Zur Nomenklatur und Taxonomie der Arthropogoneae (Gramineae, Panicoideae). Willdenowia 6 (3): 511–517.
  4. Chase, A. (1911) Notes on genera of Paniceae. IV. Proceedings of the Biological Society of Washington 24: 103–160. https://doi.org/10.5962/bhl.title.53634
  5. Filgueiras, T.S. (1989) Revisão de Mesosetum Steudel (Gramineae: Paniceae). Acta Amazônica 19: 47–114. https://doi.org/10.1590/1809-43921989191114
  6. Funk, V., Hollowell, T., Berry, P., Kelloff, C. & Alexander, S.N. (2007) Checklist of the plants of the Guiana Shield (Venezuela: Amazonas, Bolivar, Delta Amacuro; Guyana, Surinam, French Guiana). Contributions from the United States National Herbarium 55: 1–584.
  7. Hitchcock, A.S. (1909) The grasses of Cuba. Contributions from the United States National Herbarium 12 (6): 1–474.
  8. 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. [https://www.iucnredlist.org/documents/RedListGuidelines.pdf]
  9. Kunth, C.S. (1815) Gramineae. In: Humboldt, A., Bonpland, A. & Kunth, K. (Eds.) Nova genera et species plantarum (quarto ed.) 1. Lutetiae Parisiorum: sumtibus librariae Graeco-Latini-Germanicae, pp. 84–201. https://doi.org/10.5962/bhl.title.515
  10. McClure, F.A. & Soderstrom, T.R. (1972) The Agrostological Term Anthecium. Taxon 21 (1): 153–154. https://doi.org/10.2307/1219242
  11. Morrone, O., Aagesen, L., Scataglini, M.A., Salariato, D.L., Denham, S., Chemisquy, M.A., Sede, S.M., Giussani, L.M., Kellogg, E.A. & Zuloaga, F.O. (2012) Phylogeny of the Paniceae (Poaceae: Panicoideae): integrating plastid DNA sequences and morphology into a new classification. Cladistics 28: 333–356. https://doi.org/10.1111/j.1096-0031.2011.00384.x
  12. Oliveira, R.C., Welker, C.A.D., Fieker, C.Z., Filgueiras, T.S. & Sousa, M.W.S. (2019a) A new species of Mesosetum (Poaceae: Paspaleae: Arthropogoninae) with a winged rachis from Serra da Canastra, Minas Gerais, Brazil. Phytotaxa 404 (4): 155–162. https://doi.org/10.11646/phytotaxa.404.4.4
  13. Oliveira, R.C., Gomes, S.M., Felipe-da-Silva, J.G. & Valls, J.F.M. (2019b) Mesosetum filgueirasii (Poaceae, Arthropogoninae): A New Species from the Cerrado Biome, Brazil, and its Leaf Blade Anatomy. Systematic Botany 44 (2): 319–323. https://doi.org/10.1600/036364419X15562052252036
  14. Plouvier, D., Gomes, L., Verweij, P. & Verlinden, N. (2012) Living Guianas Report 2012. WWF Guianas, Suriname, 84 pp.
  15. Presl, J.S. (1830) Gramineae. In: Presl, K.B. (Ed.) Reliquiae Haenkeanae 1. J.G. Galve, Prague, pp. 207–355. https://doi.org/10.5962/bhl.title.515
  16. Rahm, M., Smartt, T., Paloeng, C., Kasanpawiro, C., Moe Soe Let, V., Pichot, C., Bedeau, C., Farias, P., Carvalho, R. & Villien, C. (2021) Monitoring the impact of gold mining on the forest cover and freshwater in the Guiana Shield from 2001 to 2018. ECOSEO project, WWF, 40 pp.
  17. Sarthou, C. & Villiers, J.F. (1998) Epilithic plant communities on inselbergs in French Guiana. Journal of Vegetation Science 9: 847–860. https://doi.org/10.2307/3237050
  18. Silva, A.S., Ribeiro, A.R.O., Sousa, M.W.S., Fagg, C.W., Falcão, R. & Oliveira, R.C. (2015) Micromorphology of the upper anthecium in Mesosetum Steud. and related genera (Poaceae, Arthropogoninae) and its taxonomic applications. Rodriguésia 66 (2): 645–657. https://doi.org/10.1590/2175-7860201566227
  19. Silva, A.S., Villarroel, D., Ribeiro, A.R.O. & Oliveira, R.C. (2016) Eleven new records of little known taxa of Mesosetum and Paspalum (Poaceae) from Brazil and Bolivia. Phytotaxa 268: 69–79. https://doi.org/10.11646/phytotaxa.268.1.5
  20. Silva, A.S. (2017) Taxonomia e filogenia do gênero Mesosetum Steud. (Poaceae, Paspaleae). Ph.D. Dissertation, Universidade de Brasília, Brasília, 169 pp.
  21. Silva, A.S., Ribeiro, A.R.O., Oliveira, R.C. & Filgueiras, T.S. (in memoriam) (2023) Mesosetum In: Flora e Funga do Brasil. Jardim Botânico do Rio de Janeiro. Available from: https://floradobrasil.jbrj.gov.br/FB13355 (accessed 20 July 2023)
  22. Soreng, R.J., Peterson, P.M., Zuloaga, F.O., Romaschenko, K., Clark, L.G., Teisher, J.K., Gillespie, L.J., Barberá, P., Welker, C.A.D., Kellogg, E.A., Li, D.Z. & Davidse, G. (2022) A worldwide phylogenetic classification of the Poaceae (Gramineae) III: An update. Journal of Systematics and Evolution 60: 476–521. https://doi.org/10.1111/jse.12150
  23. Steudel, E.G. von (1854) Synopsis Plantarum Glumacearum. Part 1. Gramineae. J.B. Metzler, Stuttgartle, 474 pp. https://doi.org/10.5962/bhl.title.471
  24. Swallen, J.R. (1937) The grass genus Mesosetum. Brittonia 2: 363–392. https://doi.org/10.2307/2804761
  25. Thiers, B. (2023) 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 18 June 2023)
  26. Trinius, C.B. (1826) De Graminibus Paniceis. Dissertatio botanica altera. Impensis Academiae Imperialis Scientiarum, Saint Petersburg, 289 pp. https://doi.org/10.5962/bhl.title.15256

How to Cite

Silva, A.S.D., Ribeiro, A.R.D.O., Reis, P.A.D., Buso, G.S.C. & Oliveira, R.C.D. (2025) Mesosetum aureum (Poaceae: Paspaleae: Arthropogoninae), an annual new species with reddish golden trichomes from the northern South America. Phytotaxa 702 (2): 166–174. https://doi.org/10.11646/phytotaxa.702.2.4