Notas históricas sobre a família Cactaceae no Rio Grande do Sul (Brasil) e Uruguai. I – Período Clássico (1818-1950): viajantes naturalistas e botânicos europeus

Pontes, Rodrigo Corrêa; Marchiori, José Newton Cardoso; Neto, Leopoldo Witeck

doi:10.5902/2358198026215

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“…Some of the southern South American (sSA) species of Opuntia have a confused taxonomic history. Many of these taxa were described based on materials collected by Old World naturalists that were travelling to the New World and sending biological materials to European gardens (Pontes et al 2017). That routine led to many names, which were poorly described, based on morphotypes grown under greenhouses conditions, with insufficient diagnoses or use of characters and usually without the designation of nomenclatural types (Haworth 1812; Pfeiffer 1837; Salm-Dyck 1850).…”

Section: Introductionmentioning

confidence: 99%

Reassessment and typification ofOpuntia canterae(Opuntioideae, Cactaceae), an endemic prickly-pear cactus of Uruguay

Köhler

Majure

2020

Preprint

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Background and aimsOpuntia is the most widespread genus of Cactaceae, naturally occurring throughout arid and semi-arid areas of the Americas. Many of the species have taxonomic problems owed to incomplete original descriptions, lack of type designations, a paucity of taxonomic revisions and in general, difficult species delimitation resulting from hybridization, morphological plasticity and poor specimen preparation. However, efforts are being undertaken to fill in the gaps in our distributional, morphological and phylogenetic knowledge of the group. Here, we reassess the name Opuntia canterae, providing an updated description, typification, photographs, distribution map, conservation assessment and additional notes.Material and methodsExtensive fieldwork was conducted, along with comprehensive herbarium and literature review. Morphological characters were assessed based on the commonly used characters used for prickly pears. Species delimitation is proposed based on our morphological studies, taxonomic and literature revision, as well as preliminary phylogenetic studies. The IUCN guidelines were followed to provide a conservation assessment of the species.Key resultsOpuntia canterae is reassessed as a distinct species separated from its previous synonym (O. elata) by the elliptic to long-oblanceolate stem segments, acute to conical flower bud apex and long-obconic fruits. An epitype is here designate for purposes of the precise designation of the name to the taxon. The species is considered endemic to Uruguay and is assessed as Vulnerable (VU) using IUCN criteria, but more fieldwork will be necessary to provide a more precise conservation status.

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Section: Introductionmentioning

confidence: 99%

Reassessment and typification ofOpuntia canterae(Opuntioideae, Cactaceae), an endemic prickly-pear cactus of Uruguay

Köhler

Majure

2020

Preprint

View full text Add to dashboard Cite

show abstract

Notas históricas sobre a família Cactaceae no Rio Grande do Sul (Brasil) e Uruguai. I – Período Clássico (1818-1950): viajantes naturalistas e botânicos europeus

Abstract: O histórico das descobertas de cactáceas no Rio Grande do Sul e Uruguai é examinado a partir de registros literários dos viajantes naturalistas, horticultores e botânicos que se dedicaram à prospecção e ao estudo destas plantas no espaço regional.

Cited by 1 publication

References 2 publications

Reassessment and typification ofOpuntia canterae(Opuntioideae, Cactaceae), an endemic prickly-pear cactus of Uruguay

Reassessment and typification ofOpuntia canterae(Opuntioideae, Cactaceae), an endemic prickly-pear cactus of Uruguay

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