Abstract:
Echeveria kristenii is described as a new species from Sierra Azul, Mezquital, Durango. The new species belongs to a sub-group of northwestern Mexican taxa within ser. Gibbiflorae. Within the series it is most similar to E. dactylifera and E. novogaliciana in its acaulescent habit, sessile, farinaceous and somewhat narrowed leaves, paniculate inflorescences with short cincinni, and the presence of finger-like appendages at the base of the epipetalous filaments. Characters that distinguish it from those species include the size of the rosette, the shape, color, and size of the leaves, and the color of the styles and nectary scales. Additionally, three diagnostic nucleotide characters were found in rbcL, matK and ITS2, three standard DNA barcoding regions, that differentiate the new species not only from its closest relatives, but from all other taxa of ser. Gibbiflorae.
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Acknowledgements
We thank the Consejo Nacional de Ciencia y Tecnología (CONACyT) for financial support of the project 247078, “Iniciativa interdisciplinaria para el aprovechamiento sustentable del género Echeveria (Crassulaceae), plantas con potencial hortícola para la producción en áreas rurales de México” (awarded to F. V.-S.), and project 232746 (awarded to the Laboratorio de Biodiversidad). We also thank DGAPA-PAPIIT, UNAM, for financial support of the project IN212015, “Taxonomía integrativa y códigos de barras genéticos en Echeveria (Crassulaceae)” (awarded to F. V.-S.), and L. E. de la Cruz acknowledges the Posgrado en Ciencias Biológicas, UNAM, and CONACyT for graduate scholarships. We are also grateful to Julia Etter and Martin Kristen for the plant material provided. Finally, we thank two anonymous reviewers and the editorial team of Brittonia for their helpful comments and suggestions on the manuscript.
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Appendix
Specimens examined of Echeveria dactlifera and E. novogaliciana
Echeveria dactylifera. MEXICO. Jalisco: Municipality of Bolaños, southwest of San Martín de Bolaños, 21°53′10.6”N, 103°50′10.7”W, 1975 m, 3 Jun 2012, J. Etter & M. Kristen 3543 (MEXU). Durango: Durango-Mazatlán Highway, Espinazo del Diablo, 23°39′38.24”N, 105°45′46.75”W, 2078 m, J. Reyes 6274 (MEXU).
Echeveria novogaliciana. MEXICO. Jalisco: municipality of Zapopan, El Colli Hill, southwest of Las Chivas soccer stadium, 20°39′45.7”N, 103°27′39.3”W, 1872 m, 28 Nov 2010, J. Reyes 6823 (MEXU). Zacatecas: Municipality of Jalpa, Km 17.4 of the Jalpa-Tlaltenango highway, 21°39′35.3”N, 103°7′17.6”W, 1971 m, 2 Nov 2012, J. Etter & M. Kristen 3721 (MEXU).
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de la Cruz-López, .E., Santiago, J.R. & Vergara-Silva, F. A new species of Echeveria (Crassulaceae) from Durango, Mexico, supported by morphology and DNA diagnostic characters. Brittonia 73, 374–382 (2021). https://doi.org/10.1007/s12228-021-09684-7
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DOI: https://doi.org/10.1007/s12228-021-09684-7