Resumen
Se propone como nueva especie a Echeveria islasiae, una planta colectada cerca del poblado de Olinalá en el estado de Guerrero, México. Sus características morfológicas tales como sus inflorescencias en cincino con pocas flores y corola elongada con ápice verdoso, la relacionan con los taxones de la serie Longistylae. Por el contrario, difiere de los otros miembros de la serie por presentar hojas más angostas, verde oscuro, oblanceolado-espatuladas a cimbiformes, algo triquetras en el ápice, pedúnculo floral rojizo oscuro, por el color rosa en la zona media de la corola, así como, por la ausencia de apéndices a los lados de los filamentos epipétalos. Un primer acercamiento para la construcción de una librería de referencia de códigos de barras genéticos, indica dos nucleótidos diagnósticos que diferencian molecularmente al nuevo taxon de sus especies relacionadas, uno en la región del cloroplasto matK y uno en la región nuclear ITS2.
Abstract
Echeveria islasiae is proposed as new species, a plant collected near the town of Olinalá in the state of Guerrero, Mexico. Its morphological characteristics such as few-flowered cincinnate inflorescences and an elongate corolla with greenish apex relate it with the taxa of ser. Longistylae. Conversely, it differs from the other taxa of the series by having narrower, dark green, oblanceolate-spatulate to cymbiform leaves that are somewhat triquetrous at the apex, deep red floral peduncles and pedicels, the corolla pink colored at the middle, and the absence of appendages at the sides of the epipetalous filaments. A first effort to build a reference library for DNA barcoding shows two diagnostic nucleotides which differentiate the new species from related taxa, one in the matK chloroplast region and one in the ITS2 nuclear region.
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Reyes Santiago, J., de la Cruz-López, L.E. Echeveria islasiae, una nueva especie de la serie Longistylae (Crassulaceae). Brittonia 73, 363–373 (2021). https://doi.org/10.1007/s12228-021-09658-9
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DOI: https://doi.org/10.1007/s12228-021-09658-9