Phylogenetic relationships in Coryphantha and implications on Pelecyphora and Escobaria (Cacteae, Cactoideae, Cactaceae)
| Autor: | Daniel Sánchez, Balbina Vázquez-Benítez, Monserrat Vázquez-Sánchez, David Aquino, Salvador Arias |
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| Rok vydání: | 2022 |
| Předmět: |
Cactaceae
Coryphantha Pelecyphora Botany Coryphantha macromeris Plant Science Biota Caryophyllales Escobaria zilziana groove on tubercule Tracheophyta Magnoliopsida taxonomy QK1-989 Escobaria Plantae infrageneric classification extrafloral glands Cactoideae Ecology Evolution Behavior and Systematics |
| Zdroj: | PhytoKeys 188: 115-165 PhytoKeys, Vol 188, Iss, Pp 115-165 (2022) |
| ISSN: | 1314-2003 1314-2011 |
| Popis: | The genus Coryphantha includes plants with globose to cylindrical stems bearing furrowed tubercles, flowers arising at the apex, and seeds with flattened testa cells. Coryphantha is the second richest genus in the tribe Cacteae. Nevertheless, the genus lacks a phylogenetic framework. The limits of Coryphantha with its sister genus Escobaria and the infrageneric classification of Coryphantha have not been evaluated in a phylogenetic study. In this study we analyzed five chloroplast regions (matK, rbcL, psbA-trnH, rpl16, and trnL-F) using Bayesian phylogenetic analysis. We included 44 species of Coryphantha and 43 additional species of the tribe Cacteae. Our results support the monophyly of Coryphantha by excluding C. macromeris. Escobaria + Pelecyphora + C. macromeris are corroborated as the sister group of Coryphantha. Within Coryphantha our phylogenetic analyses recovered two main clades containing seven subclades, and we propose to recognize those as two subgenera and seven sections, respectively. Also, a new delimitation of Pelecyphora including C. macromeris and all species previously included in Escobaria is proposed. To accommodate this new delimitation 25 new combinations are proposed. The seven subclades recovered within Coryphantha are morphologically and geographically congruent, and partially agree with the traditional classification of this genus. |
| Databáze: | OpenAIRE |
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