The genus Rapicactus was proposed in 1942 by Buxbaum and Oehme.[2] It was characterized by having thick roots with a constriction above forming a neck. However, most subsequent treatments sank the genus into a broadly circumscribed genus Turbinicarpus. The circumscription of Turbinicarpus has been described as "remarkably unstable", with species regularly transferred to other genera.[1] The broad circumscription of Turbinicarpus was recognized as polyphyletic by Hunt in 2016.[3] A phylogenetic study published in 2019 showed that a monophyleticRapicactus was sister to Acharagma, separated from a monophyletic Turbinicarpus:[1]
^ abcVázquez-sánchez, Monserrat; Sánchez, Daniel; Terrazas, Teresa; De La Rosa-Tilapa, Alejandro & Arias, Salvador (2019), "Polyphyly of the iconic cactus genus Turbinicarpus (Cactaceae) and its generic circumscription", Botanical Journal of the Linnean Society, 190 (4): 405–420, doi:10.1093/botlinnean/boz027
rapicactus, genus, cactus, tribe, cacteae, subfamily, cactoideae, been, synonymized, with, turbinicarpus, molecular, phylogenetic, studies, have, supported, monophyly, separation, from, that, genus, zaragosae, scientific, classification, kingdom, plantae, clad. Rapicactus is a genus of cactus in the tribe Cacteae subfamily Cactoideae It has been synonymized with Turbinicarpus but molecular phylogenetic studies have supported its monophyly and separation from that genus 1 Rapicactus Rapicactus zaragosae Scientific classification Kingdom Plantae Clade Tracheophytes Clade Angiosperms Clade Eudicots Order Caryophyllales Family Cactaceae Subfamily Cactoideae Tribe Cacteae Genus RapicactusBuxb amp Oehme Type species Rapicactus subterraneus Species See text Taxonomy editThe genus Rapicactus was proposed in 1942 by Buxbaum and Oehme 2 It was characterized by having thick roots with a constriction above forming a neck However most subsequent treatments sank the genus into a broadly circumscribed genus Turbinicarpus The circumscription of Turbinicarpus has been described as remarkably unstable with species regularly transferred to other genera 1 The broad circumscription of Turbinicarpus was recognized as polyphyletic by Hunt in 2016 3 A phylogenetic study published in 2019 showed that a monophyletic Rapicactus was sister to Acharagma separated from a monophyletic Turbinicarpus 1 Three species of other genera Acharagma Rapicactus Species of other genera Species of other genera Kadenicarpus Ariocarpus Turbinicarpus s s Species edit As of March 2022 update Plants of the World Online accepted four species 4 Image Scientific name Distribution nbsp Rapicactus beguinii N P Taylor Luthy NE Mexico nbsp Rapicactus mandragora Fric ex A Berger Buxb amp Oehme Mexico Durango Coahuila Nuevo Leon nbsp Rapicactus subterraneus Backeb Buxb amp Oehme Mexico Nuevo Leon Tamaulipas San Luis Potosi nbsp Rapicactus zaragosae Glass amp R A Foster D Donati Mexico Nuevo Leon Tamaulipas References edit a b c Vazquez sanchez Monserrat Sanchez Daniel Terrazas Teresa De La Rosa Tilapa Alejandro amp Arias Salvador 2019 Polyphyly of the iconic cactus genus Turbinicarpus Cactaceae and its generic circumscription Botanical Journal of the Linnean Society 190 4 405 420 doi 10 1093 botlinnean boz027 Rapicactus Buxb amp Oehme International Plant Names Index IPNI Royal Botanic Gardens Kew Harvard University Herbaria amp Libraries Australian National Botanic Gardens retrieved 2022 03 05 Hunt D R 2016 CITES Cactaceae checklist 3rd ed Kew Royal Botanic Gardens and D Hunt ISBN 978 0 9933113 2 1 Rapicactus Buxb amp Oehme Plants of the World Online Royal Botanic Gardens Kew retrieved 2022 03 07 nbsp This Cactaceae article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Rapicactus amp oldid 1185870927, wikipedia, wiki, book, books, library,
