Morphological variation of Coryphantha (Cactaceae): a multivariate approach
Coryphantha consists of 43 to 67 species. This genus exhibit patterns of morphological variations that have been understood differently and have led to an unstable taxonomy, resulting in the fact that a consensus on the delimitation of species has yet to be reached. Previous classifications are base...
| Main Authors: | , , |
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| Format: | Online |
| Jezik: | spa |
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Instituto de Ecología, A.C.
2016
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| Online dostop: | https://abm.ojs.inecol.mx/index.php/abm/article/view/1117 |
| _version_ | 1799771305092841472 |
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| author | Vázquez-Benítez, Balbina Arias, Salvador Cervantes-Sandoval, Armando |
| author_facet | Vázquez-Benítez, Balbina Arias, Salvador Cervantes-Sandoval, Armando |
| author_sort | Vázquez-Benítez, Balbina |
| collection | ABM |
| description | Coryphantha consists of 43 to 67 species. This genus exhibit patterns of morphological variations that have been understood differently and have led to an unstable taxonomy, resulting in the fact that a consensus on the delimitation of species has yet to be reached. Previous classifications are based on qualitative characters. In order to clarify and circumscribe species of Coryphantha, different multivariate analysis techniques were used. A total of 1840 individuals among 48 taxa were examined; 467 in the field and 1373 from herbarium specimens. We used 28 vegetative and reproductive characters of which 17 were quantitative and 11 qualitative. Cluster analysis indicated the presence of two major groups based on the presence or absence of extrafloral glands. Discriminant analysis for each subgroup consisting of the cluster analysis allowed circumscription based on morphometric variables of the majority of the analyzed species. Based on morphological characters and multivariate analysis, recognition of taxonomic categories at species or subspecies level is discussed. 45 species and three subspecies are recognized. |
| format | Online |
| id | oai:oai.abm.ojs.inecol.mx:article-1117 |
| institution | Acta Botanica Mexicana |
| language | spa |
| publishDate | 2016 |
| publisher | Instituto de Ecología, A.C. |
| record_format | ojs |
| spelling | oai:oai.abm.ojs.inecol.mx:article-11172022-11-18T00:42:25Z Morphological variation of Coryphantha (Cactaceae): a multivariate approach Variación morfológica de Coryphantha (Cactaceae): un enfoque multivariado Vázquez-Benítez, Balbina Arias, Salvador Cervantes-Sandoval, Armando Cactaceae cluster analysis Coryphantha discriminant analysis taxonomy análisis de conglomerados análisis discriminante Cactaceae Coryphantha taxonomía Coryphantha consists of 43 to 67 species. This genus exhibit patterns of morphological variations that have been understood differently and have led to an unstable taxonomy, resulting in the fact that a consensus on the delimitation of species has yet to be reached. Previous classifications are based on qualitative characters. In order to clarify and circumscribe species of Coryphantha, different multivariate analysis techniques were used. A total of 1840 individuals among 48 taxa were examined; 467 in the field and 1373 from herbarium specimens. We used 28 vegetative and reproductive characters of which 17 were quantitative and 11 qualitative. Cluster analysis indicated the presence of two major groups based on the presence or absence of extrafloral glands. Discriminant analysis for each subgroup consisting of the cluster analysis allowed circumscription based on morphometric variables of the majority of the analyzed species. Based on morphological characters and multivariate analysis, recognition of taxonomic categories at species or subspecies level is discussed. 45 species and three subspecies are recognized. Coryphantha tiene entre 43 y 67 especies. Los patrones de variación morfológica del género se han interpretado de distintas formas y han conducido a una taxonomía inestable, de manera que aún no se ha establecido un consenso en la delimitación de las especies. Clasificaciones previas de Coryphantha se han basado en caracteres cualitativos. Para dilucidar y circunscribir especies de Coryphantha se emplearon diferentes técnicas de análisis multivariado. Se muestrearon un total de 1840 individuos, 467 ejemplares en campo y 1373 registros herborizados de 48 taxa del género. Se emplearon 28 caracteres vegetativos y reproductivos de los cuales 17 fueron cuantitativos y 11 cualitativos. El análisis de conglomerados indicó la presencia de dos grandes grupos organizados por la presencia o ausencia de glándulas extraflorales. Los análisis discriminantes para cada subgrupo formado por los análisis de conglomerados permitieron circunscribir con base en variables morfométricas a la mayoría de las especies analizadas. Con base en los caracteres morfológicos y los análisis multivariados se discute el reconocimiento de categorías taxonómicas a nivel de especie o subespecie. Se reconocen 45 especies y tres subespecies. Instituto de Ecología, A.C. 2016-07-14 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion artículo evaluado por pares application/pdf text/html https://abm.ojs.inecol.mx/index.php/abm/article/view/1117 10.21829/abm116.2016.1117 Acta Botanica Mexicana; No. 116 (2016); 21-47 Acta Botanica Mexicana; Núm. 116 (2016); 21-47 2448-7589 0187-7151 spa https://abm.ojs.inecol.mx/index.php/abm/article/view/1117/1320 https://abm.ojs.inecol.mx/index.php/abm/article/view/1117/html Derechos de autor 2016 Acta Botanica Mexicana |
| spellingShingle | Vázquez-Benítez, Balbina Arias, Salvador Cervantes-Sandoval, Armando Morphological variation of Coryphantha (Cactaceae): a multivariate approach |
| title | Morphological variation of Coryphantha (Cactaceae): a multivariate approach |
| title_full | Morphological variation of Coryphantha (Cactaceae): a multivariate approach |
| title_fullStr | Morphological variation of Coryphantha (Cactaceae): a multivariate approach |
| title_full_unstemmed | Morphological variation of Coryphantha (Cactaceae): a multivariate approach |
| title_short | Morphological variation of Coryphantha (Cactaceae): a multivariate approach |
| title_sort | morphological variation of coryphantha (cactaceae): a multivariate approach |
| url | https://abm.ojs.inecol.mx/index.php/abm/article/view/1117 |
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