My research is focused on the systematics and evolution of species-rich plant lineages. I use molecular phylogenetics to address questions about evolutionary history, morphological evolution, and to unravel patterns of species diversification and geographic distribution of the mega-diverse and widely distributed genera Croton and Euphorbia (Euphorbiaceae).
I am interested in understanding the intrinsic and extrinsic factors involved in the process of species diversification and whether key adaptations or/and ecological opportunities have triggered explosive diversification events in the evolutionary history of those lineages.
Other questions that I am starting to address are related to the evolution of floral morphology in Croton and its possible relation to changes in pollination systems. Finally, part of my work also involves the construction of taxonomic classifications of lineages within Euphorbiaceae using a phylogenetic framework but considering morphological patterns. In doing so, I also conduct taxonomic revisions of selected groups, contribute to regional floras and checklists, and describe new taxa.
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2020 | Silva, O.L.M., Riina, R., Cordeiro, I. (2020). Phylogeny and biogeography of Astraea with new insights into the evolutionary history of Crotoneae (Euphorbiaceae). Molecular Phylogenetics and Evolution 145:106738. DOI | |
2020 | Marques Da Silva, O.L., Antar, G.M., Riina, R., Cordeiro, I. (2020). Euphorbia adenoplicata, a New Species of Euphorbia sect. Crossadenia from Brazil. Systematic Botany 45(1):131-136. DOI | |
2019 | Chen, S.-C., Pahlevani, A.H., Malíková, L., Riina, R., Thomson, F.J., Giladi, I. (2019). Trade-off or coordination? Correlations between ballochorous and myrmecochorous phases of diplochory. Functional Ecology 33(8):1469-1479. DOI | |
2020 | Mateo-Ramírez L., Riina R. (2020). Croton calcareus: A new species of dragon's blood (Euphorbiaceae) from dry forest in the state of Chiapas, Mexico. European Journal of Taxonomy 657:1-14. Open Access | |
2019 | Da Silva, O.L.M., Dias, P., Riina, R., Cordeiro, I. (2019). Redelimitation of Astraea lobata (Euphorbiaceae) and other taxonomic rearrangements in Astraea. Phytotaxa 404(4):127-136. DOI | |
2019 | de Farias, S.Q., Medeiros, D., Riina, R. (2019). A new species of dragon's blood Croton (Euphorbiaceae) from Serra dos órgãos (Rio de Janeiro, Brazil). PhytoKeys 126:13-24. Open Access | |
2018 | Feio, A.C., Ore-Rengifo, M.I., Berry, P.E., Riina R. (2018). Four New Species of Dragon's Blood Croton (Euphorbiaceae) from South America. Systematic Botany 43(1):212-220. DOI | |
2018 | Feio, A.C., Meira, R.M.S.A., Riina, R. (2018). Leaf anatomical features and their implications for the systematics of dragon's blood, Croton section Cyclostigma (Euphorbiaceae). Botanical Journal of the Linnean Society 187(4):614-632. DOI | |
2018 | Villaverde, T., Pokorny, L., Olsson, S., Rincón-Barrado, M., Johnson, M.G., Gardner, E.M., Wickett, N.J., Molero, J., Riina, R., Sanmartín, I. (2018). Bridging the micro- and macroevolutionary levels in phylogenomics: Hyb-Seq solves relationships from populations to species and above. New Phytologist 220:636-650. Open Access | |
2018 | Riina, R., Berry, P.E., Secco, R.D.S., Meier, W., Caruzo, M.B.R. (2018). Reassessment of Croton sect. Cleodora (Euphorbiaceae) points to the Amazon Basin as its main center of diversity. Annals of the Missouri Botanical Garden 103(3):330-349. DOI | |
2017 | Nieto Feliner G., Álvarez I., Fuertes-Aguilar J., Heuertz M., Marques I., Moharrek F., Piñeiro R., Riina R., Rosselló J.A., Soltis P.S., Villa-Machío I. (2017). Is homoploid hybrid speciation that rare? An empiricist's view. Heredity 118:513-516. DOI | |
2017 | DRYFLOR, Banda-R, K., Delgado-Salinas, A., Dexter, K.G., Galetti, L., Linares-Palomino, R., Maturo, H.M., Mogni, V., Oakley, L., Olivera-Filho, A., Prado, D., Quintana, C., Riina, R., Särkinen, T. (2017). Forest conservation: Remember Gran Chaco - Response. Science 355(6324):465-466. DOI | |
2017 | DRYFLOR, Banda-R, K., Delgado-Salinas, A., Dexter, K.G., Linares-Palomino, R., Olivera-Filho, A., Prado, D., Quintana, C., Riina, R. (2017). Forest conservation: Humans' handprints - Response. Science 355(6324):467. DOI | |
2017 | Pereira, A.d.P.N., Riina, R., Caruzo, M.B.R. (2017). Rediscovery and sectional placement of Croton ichthygaster (Euphorbiaceae), a rare species from Southern Brazil. Phytotaxa 309(1):79-84. DOI | |
2017 | dos Santos, R.F., Riina, R., Caruzo, M.B.R. (2017). Diversity of arborescent lineages of Crotoneae (Euphorbiaceae) in the Brazilian Atlantic Rain Forest. Plant Systematics and Evolution 303(10):1467-1497. Open Access | |
2017 | Arévalo, R., van Ee, B.W., Riina, R., Berry, P.E., Wiedenhoeft, A.C. (2017). Force of habit: shrubs, trees and contingent evolution of wood anatomical diversity using Croton (Euphorbiaceae) as a model system. Annals of Botany 119(4):563-579. DOI | |
2017 | Cardoso, D., Särkinen, T., Alexander, S., Amorim, A.M., Bittrich, V., Celis, M., Daly, D.C., Fiaschi, P., Funk, V.A., Giacomin, L.L., Goldenberg, R., Heiden, G., Iganci, J., Kelloff, C.L., Knapp, S., Cavalcante de Lima, H., Machado, A.F.P., dos Santos, R.M., Mello-Silva, R., Michelangeli, F.A., Mitchell, J., Moonlight, P., Rodrigues de Moraes, P.L., Mori, S.A., Nunes, T.S., Pennington, T.D., Pirani, J.R., Prance, G.T., Paganucci de Queiroz, L., Rapini, A., Riina, R., Rincon, C.A.V., Roque, N., Shimizu, G., Sobral, M., Stehmann, J.R., Stevens, W.D., Taylor, C.M., Trovó, M., van den Berg, C., van der Werff, H., Viana, P.L., Zartman, C.E., Forzza, R.C. (2017). Amazon plant diversity revealed by a taxonomically verified species list. PNAS 114(40):10695-10700. Open Access | |
2017 | Pereira, A.D.P.N., Riina, R., Caruzo, M.B.R. (2017). A new species of Croton section Lamprocroton (Euphorbiaceae) from Southern Brazil. Systematic Botany 42(4):830-834. Open Access | |
2016 | Feio A.C., Riina R., Meira R.M.S.A. (2016). Secretory structures in leaves and flowers of two dragon's blood croton (Euphorbiaceae): New evidence and interpretations. International Journal of Plant Sciences 177(6):511-522. DOI | |
2016 | Cheek M., Challen G., Lebbie A., Banks H., Barberá P., Riina R. (2016). Discovering Karima (Euphorbiaceae), a new crotonoid genus from west tropical Africa long hidden within Croton. PLoS ONE 11(4):e0152110. Open Access | |
2016 | Rumeu B., Vargas P., Riina R. (2016). Incipient radiation versus multiple origins of the Galápagos Croton scouleri (Euphorbiaceae). Journal of Biogeography 43(9):1717-1727. DOI | |
2016 | Vitarelli N.C., Riina R., Cassino M.F., Meira R.M.S.A. (2016). Trichome-like emergences in Croton of Brazilian highland rock outcrops: Evidences for atmospheric water uptake. Perspectives in Plant Ecology, Evolution and Systematics 22.23-35. DOI | |
2016 | Banda, K.R., Delgado-Salinas, A., Dexter, K.G., Linares-Palomino, R., Oliveira-Filho, A., Prado, D., Pullan, M., Quintana, C., Riina, R., Rodríguez, G.M., Weintritt, J., Acevedo-Rodríguez, P., Adarve, J., Álvarez, E., Aranguren, A.B., Arteaga, J.C., Aymard, G., Castaño, A., Ceballos-Mago, N., Cogollo, Á., Cuadros, H., Delgado, F., Devia, W., Dueñas, H., Fajardo, L., Fernández, Á., Fernández, M.Á., Franklin, J., Freid, E.H., Galetti, L.A., Gonto, R., González, R.M., Graveson, R., Helmer, E.H., Idárraga, Á., López, R., Marcano-Vega, H., Martínez, O.G., Maturo, H.M., McDonald, M., McLaren, K., Melo, O., Mijares, F., Mogni, V., Molina, D., Moreno, N.D.P., Nassar, J.M., Neves, D.M., Oakley, L.J. (2016). Plant diversity patterns in neotropical dry forests and their conservation implications. Science 353(6306):1383-1387. DOI | |
2016 | Caruzo M.B.R., Dos Santos R.F., Feio A.C., Meira R.M.S.A., Riina R. (2016). Redefinition of Croton macrobothrys (Euphorbiaceae), a tree species from the Brazilian Atlantic Forest, with the description of a new subspecies. Phytotaxa 273(1):51-58. DOI | |
2016 | Riina, R., Freitas dos Santos, R., Rossi Caruzo, M.B. (2016). Croton sapiifolius Müll.Arg.: a new occurrence for the state of Espírito Santo, Brazil. Hoehnea 43:529-531. Open Access | |
2015 | Barberá, P., Riina, R., Velayos, M. (2015). A new species of Grossera (Euphorbiaceae) from Equatorial Guinea. Phytotaxa 221(2):175-180. DOI | |
2015 | Luján, M., León, Y., Riina, R. (2015). Sinopsis de Croton (Euphorbiaceae) en los Andes de Mérida, Venezuela. Caldasia 37(1):73-90. Open Access | |
2015 | Pokorny, L., Riina, R., Mairal, M., Meseguer, A.S., Culshaw, V., Cendoya, J., Serrano, M., Carbajal, R., Ortiz, S., Heuertz, M., Sanmartín, I. (2015). Living on the edge: Timing of Rand Flora disjunctions congruent with ongoing aridification in Africa. Frontiers in Genetics 6(MAY):154. Open Access | |
2015 | Riina, R., Cumbicus, N., Feio, A.C., Cerón, C.E., Meira, R.M.S.A., Berry, P.E. (2015). A new species of dragon's blood Croton (Euphorbiaceae) from South America with singular inflorescences. Webbia 70(1):187-192. DOI | |
2015 | Riina, R., Marques, O., Hurbath, F. (2015). Euphorbia from Brazil: the succulent section Brasilienses. Euphorbia World 11(3): 5-11. Open Access | |
2015 | Vitarelli, N.C., Riina, R., Caruzo, M.B., Cordeiro, I., Fuertes-Aguilar, J., Meira, R.M. (2015). Foliar secretory structures in Crotoneae (Euphorbiaceae): Diversity, anatomy, and evolutionary significance. American Journal of botany 102(6):833-847. DOI | |
2015 | Riina, R. (2015). Growing knowledge: an overview of Seed Plant diversity in Brazil. Rodriguésia 66(4):1085-1111. | |
2014 | Givnish, T.J., Barfuss, M.H.J., Ee, B.V., Riina, R., Schulte, K., Horres, R., Gonsiska, P.A., Jabaily, R.S., Crayn, D.M., Smith, J.A.C., Winter, K., Brown, G.K., Evans, T.M., Holst, B.K., Luther, H., Till, W., Zizka, G., Berry, P.E., Sytsma, K.J. (2014). Adaptive radiation, correlated and contingent evolution, and net species diversification in Bromeliaceae. Molecular Phylogenetics and Evolution 71(1):55-78. DOI | |
2014 | Horn, J.W., Xi, Z., Riina, R., Peirson, J.A., Yang, Y., Dorsey, B.L., Berry, P.E., Davis, C.C., Wurdack, K.J. (2014). Evolutionary bursts in Euphorbia (Euphorbiaceae) are linked with photosynthetic pathway. Evolution 68(12):3485-3504. DOI | |
2014 | Riina, R., Vigo, M.A., Cerón, C.E. (2014). Croton condorensis: An enigmatic new species of Euphorbiaceae from southern Ecuador. Phytotaxa 164(2):154-158. DOI | |
2014 | Riina, R., Carneiro-Torres, D.S., Peirson, J.A., Berry, P.E., Cordeiro, I. (2014). Further support for the crotoneae phylogeny: A new species of brasiliocroton (euphorbiaceae) based on morphological, geographical, and molecular evidence. Systematic Botany 39(1):227-234. DOI | |
2014 | Peirson, J., Riina, R., Mayfield, M.H., Ferguson, C.J., Urbatsch,L.E., Berry, P.E. (2014). Phylogenetics and taxonomy of the New World leafy spurges, Euphorbia section Tithymalus (Euphorbiaceae). Botanical Journal of the Linnean Society 175:191-228. DOI | |
2014 | Pahlevani, A.H., Riina, R. (2014). Synopsis of Euphorbia subgen. Esula sect. Helioscopia (Euphorbiaceae) in Iran with the description of Euphorbia mazandaranica sp. nov.. Nordic Journal of Botany 32(3):257-278. DOI | |
2013 | Peirson, J.A., Bruyns, P.V., Riina, R., Morawetz, J.J., Berry, P.E. (2013). A molecular phylogeny and classification of the largely succulent and mainly African Euphorbia subg. Athymalus (Euphorbiaceae). Taxon 62(6):1178-1199. DOI | |
2013 | Riina, R., Peirson, J.A., Geltman, D.V., Molero, J., Frajman, B., Pahlevani, A., Barres, L., Morawetz, J.J., Salmaki, Y., Zarre, S., Kryukov, A., Bruyns, P.V., Berry, P.E. (2013). A worldwide molecular phylogeny and classification of the leafy spurges, Euphorbia subgenus Esula (Euphorbiaceae). Taxon 62:316-342. DOI | |
2013 | Dorsey, B.L., Haevermans, T., Aubriot, X., Morawetz, J.J., Riina, R., Steinmann, V.W., Berry, P.E. (2013). Phylogenetics, morphological evolution, and classification of Euphorbia subgenus Euphorbia. Taxon 62:291-315. DOI | |
2013 | Chávez, K., Compagnone, R.S., Riina, R., Briceño, A., González, T., Squitieri, E., Landaeta, C., Soscún, H., Suárez, A.I. (2013). Crotofolane diterpenoids from Croton caracasanus. Natural product communications 8(12):1679-1682. Open Access | |
2012 | Yang, Y., Riina, R., Morawetz, J.J., Haevermans, T., Aubriot, X., Berry, P.E. (2012). Molecular phylogenetics and classification of Euphorbia subgenus Chamaesyce (Euphorbiaceae). Taxon 61:764-789. DOI | |
2012 | Carneiro-Torres, D.S., Cordeiro, I., Giulietti, A.M., Riina, R. (2012). Euphorbia flaviana, a new species from the inselbergs of Bahia (Brazil) and lctotypification of E. crossadenia. Systematic Botany 37:688-693. DOI | |
2012 | Horn, J.W., van Ee, B.W., Morawetz, J.J., Riina, R., Steinmann, V.W., Berry, P.E., Wurdack, K.J. (2012). Phylogenetics and the evolution of major structural characters in the giant genus Euphorbia L. (Euphorbiaceae). Molecular Phylogenetics and Evolution 63:305-326. DOI | |
2012 | Grande, J.R., Kallunki, J., Arbo, M.M., Berry, P.E., Huber, O., Riina, R. (2012). Botanical novelties from Sierra de Maigualida, Southern Venezuela. II. Anales del Jardin Botanico de Madrid 69:7-19. Open Access | |
2011 | van Ee, B.W., Riina, R., Berry, P.E. (2011). A revised infrageneric classification and molecular phylogeny of new world croton (Euphorbiaceae). Taxon 60:791-823. DOI | |
2011 | Caruzo, M.B.R., van Ee, B.W., Cordeiro, I., Berry, P.E., Riina, R. (2011). Molecular phylogenetics and character evolution of the "sacaca" clade: Novel relationships of Croton section Cleodora (Euphorbiaceae). Molecular Phylogenetics and Evolution 60:193-206. DOI | |
2011 | Riina, R., Berry, P.E. (2011). Croton maasii (Euphorbiaceae), a new species from the Western Amazon region. Blumea 56:146-148. DOI | |
2011 | Pahlevani, A., Geltman, D.V., Riina, R. (2011). Taxonomic revision of euphorbia subsect. Myrsiniteae in Iran. Annales Botanici Fennici 48:483-493. DOI | |
2011 | Carneiro-Torres, D.S., Cordeiro, I., Giulietti, A.M., Berry, P.E., Riina, R. (2011). Three new species of Croton (Euphorbiaceae s.s.) from the Brazilian Caatinga. Brittonia 63:122-132. DOI | |
2011 | Berry, P.E., Riina, R., Peirson, J. (2011). Typification and synonymy of the species of Euphorbia subgenus Esula native to the United States and Canada.. Journal of the Botanical Research Institute of Texas 5:143-151. DOI | |
2010 | Riina, R., van Ee, B., Wiedenhoeft, A.C., Cardozo, A., Berry, P.E. (2010). Sectional rearrangement of arborescent clades of Croton (Euphorbiaceae) in South America: Evolution of arillate seeds and a new species, Croton domatifer. Taxon 59:1147-1160. DOI | |
2010 | Riina, R., Berry, P.E. (2010). Two new South American species of Croton (Euphorbiaceae) and their phylogenetic affinities | Dos nuevas especies suramericanas de Croton (Euphorbiaceae) y sus afinidades filogenéticas. Anales del Jardin Botanico de Madrid 67:23-27. Open Access | |
2021 | Riina, R., Villaverde, T., Rincón-Barrado, M., Molero, J., Sanmartín, I. (2021). More than one sweet tabaiba: Disentangling the systematics of the succulent dendroid shrub Euphorbia balsamifera. Journal of Systematics and Evolution 59(3):490-503. DOI | |
2021 | da Silva, M.J., Feitosa, G.L., Riina, R. (2021). Seek and you shall find: rediscovery of the Brazilian Euphorbia burchellii (Euphorbiaceae) after nearly a century and a half, with a conspectus of Euphorbia sect. Anisophyllum species in the state of Goiás, Brazil. Phytotaxa 479(1):83-94. DOI | |
2021 | da Silva, O.L.M., Braun, P., Riina, R., Cordeiro, I. (2021). Three new species of Euphorbia subgenus Chamaesyce (Euphorbiaceae) endemic to Brazil. European Journal of Taxonomy 733:72-86. DOI | |
2021 | Moonlight, P.W., Banda-R, K., Phillips, O.L., Dexter, K.G., Pennington, R.T., Baker, T.R., De Lima, H.C, Fajardo, L., González-M., R., Linares-Palomino, R., Lloyd, J.. Nascimento, M., Prado, D., Quintana, C., Riina, R., Rodríguez M., G.M., Villela, D.M., Aquino, A.C.M M., Arroyo, L., Bezerra, C., Tadeu Brunello, A., Brienen, R.J.W., Cardoso, D., Chao, K.-J., Cotta Coutinho, Í.A., Cunha, J., Domingues, T., do Espírito Santo, M.M., Feldpausch, T.R., Ferreira Fernandes, M., Goodwin, Z.A., Jiménez, E.M., Levesley, A., Lopez-Toledo, L., Marimon, B., Miatto, R.C., Mizushima, M., Monteagudo, A., Beserra de Moura, M.S., Murakami, A., Neves, D., Nicora Chequín, R., de Sousa Oliveira, T.C., de Oliveira, E.A., de Queiroz, L.P., Pilon, A., Marques Ramos, D., Reynel, C., Rodrigues, P.M.S., Santos, R., Särkinen, T., da Silva, V.F., Souza, R.M.S., Vasquez, R., Veenendaal, E. (2021). Expanding tropical forest monitoring into Dry Forests: The DRYFLOR protocol for permanent plots. Plants People Planet 3(3):295-300. Open Access | |
2021 | Vitarelli, N.C., Somavilla, N., Ferrari, F.B., Silva, M.R.E., Soares, E.M., Silva, O.L.M.D., Riina, R. (2021). The Amazonian Croton mollis (Euphorbiaceae): morphology and leaf anatomy help to understand its preference for the extreme igapó habitat. Flora 281:151878. Open Access | |
2021 | Rincón-Barrado, M., Olsson, S., Villaverde, T., Moncalvillo, B., Pokorny, L., Forrest, A., Riina, R., Sanmartín, I. (2021). Ecological and geological processes impacting speciation modes drive the formation of wide-range disjunctions within tribe Putorieae (Rubiaceae). Journal of Systematics and Evolution 59(5):915-934. Open Access | |
2021 | Masa-Iranzo, I., Sanmartín, I., Caruzo, M.B.R., Riina, R. (2021). Skipping the Dry Diagonal: spatio-temporal evolution of Croton section Cleodora (Euphorbiaceae) in the Neotropics. Botanical Journal of the Linnean Society 197(1):61-84. Open Access | |
2022 | Pereira, A.P.N., Riina, R., Valduga, E., Caruzo, M.B.R. (2022). A new species of Croton (Euphorbiaceae) endemic to the Brazilian Pampa and its phylogenetic affinities. Plant Systematics and Evolution 308(2):14. DOI |
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2016 | Murillo-A., J., Esser, H.-J., Berry, P., Riina, R., Van Ee, B., Steinmann, V. (2016). Especies nativas, naturalizadas o adventicias. Angiospermas. Euphorbiaceae.. In: Bernal, R., Robbert Gradstein, S., Celis, M. (eds.). Catálogo de plantas y líquenes de Colombia. Vol. I. Universidad Nacional de Colombia. pp. 1223-1246. | |
2016 | Berry, P.E., Peirson, J.A., Morawetz, J.J., Steinmann, V.W., Riina, R., Yang, Y., Geltman, D., Cacho, N.I. (2016). Euphorbia. In: Boufford, D.E. et al. (eds.). Flora of North America North of Mexico, vol. 12. Magnoliophyta: Vitaceae to Garryaceae. Oxford University Press USA. pp. 237-324. | |
2011 | Cerón, C., Riina, R., Santiana, J., Tye, A. (2011). Euphorbiaceae. In: León-Yánez, S., Valencia, R., Pitman, N., Endara, L., Ulloa Ulloa ,C., Navarrete, H. (eds.). 2011. Libro rojo de las plantas endémicas del Ecuador, 2ª edición. Publicaciones del Herbario QCA, Pontificia Universidad Católica del Ecuador, Quito.. pp.317-325. Open Access | |
2019 | Riina, R., Berry, P.E., Hube, O., Michelangeli, F.A. (2019). Vascular Plants and Bryophytes. In: Rull, V., Vegas-Vilarrúbia, T., Huber, O., Señaris, C. (eds.) Biodiversity of Pantepui. The Pristine "Lost World" of the Neotropical Guiana Highlands. Academic Press; Elsevier. pp.121-147. |
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2011 | Riina, R., Berry, P.E. (coords.). (2011). Euphorbia planetary biodiversity inventory database... Open Access |