Ipomoea lanifolia sp. nov. (Convolvulaceae), a new species endemic to the Ibiapaba plateau in northeastern Brazil

Santos, Francisco Diego; Souza, Elnatan Bezerra de; Buril, Maria Teresa

doi:10.1590/2175-7860202172076

Cited by 2 publications

(2 citation statements)

References 15 publications

(13 reference statements)

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“…A few authors also addressed the genus at a national or regional level, but several of these more extensive treatments date back to the 19th century or the first half of the 20th century (Grisebach, 1864;Gray, 1878;Hallier, 1894;House, 1908) and most of the more recent, with a few notable exceptions (e.g., Van Ooststroom, 1953;O'Donell, 1960;Verdcourt, 1963;Austin, 1975Austin, , 1982Meeuse & Welman, 2000;Wood & al., 2015), are basic checklists of species or provide only limited information about the taxa included. Ipomoea species new to science are still described regularly, especially from Brazil, Mexico, India and Southeast Asia (e.g., Traiperm & al., 2019;Santos & al., 2020Santos & al., , 2021Lawand & Shimpale, 2021), although authors often do not discuss their discoveries in a broader taxonomic context.…”

Section: ■ Introductionmentioning

confidence: 99%

The challenges of classifying big genera such as Ipomoea

Muñoz‐Rodríguez

Wood

Wells

et al. 2023

TAXON

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Big genera represent a significant proportion of the world's plants. However, comprehensive taxonomic and evolutionary studies of these genera are often complicated by their size and geographic spread. This paper explores the challenges faced in classifying these megadiverse plant groups consequent to the existing tension between diagnosability and increasing levels of resolution from molecular sequence data. We use recent examples from across angiosperms to illustrate how monophyly, diagnosability and completeness interplay with each other in attempts to classify several big genera and, specifically, the genus Ipomoea (Convolvulaceae). Ipomoea and the tribe Ipomoeeae have been the object of recent taxonomic and phylogenetic studies that highlight the limitations of previous attempts to classify the group, and show that the smaller segregate genera traditionally recognised in Ipomoeeae are nested within Ipomoea and are neither monophyletic nor diagnosable. We argue that existing classifications must be abandoned, and that recognising an expanded Ipomoea that incorporates all segregate genera of the Ipomoeeae is the most appropriate solution as it reconciles the properties of monophyly, diagnosability and completeness, and favours nomenclatural stability.

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Section: ■ Introductionmentioning

confidence: 99%

The challenges of classifying big genera such as Ipomoea

Muñoz‐Rodríguez

Wood

Wells

et al. 2023

TAXON

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“…G. Don. (Belo et al, 2023), as well as to describe new taxa (Santos et al, 2021; Santos, Alencar, et al, 2020; Santos, Arruda, et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Leaf and stem micromorphology of Jacquemontia evolvuloides (Moric.) Meisn. (Convolvulaceae) populations: New insights for taxonomic classification using light and scanning electron microscopy

Belo

Buril

Santos

et al. 2023

Microscopy Res & Technique

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Morphoanatomical studies can provide useful and relevant information to support taxonomic groupings. Jacquemontia evolvuloides shows great morphological variability, which has led to numerous taxonomic classifications. To determine if anatomical characters can be used to recognize operational taxonomic units within populations of that species, we analyzed the leaves and stems of 22 populations using light and scanning electron microscopy. The variability of the analyzed characters allowed the grouping of these populations into five morphotypes. The presence of paracytic stomata, laticiferous canals, and stellate trichomes can be considered diagnostic characters of J. evolvuloides. The presence and types of epicuticular waxes, as well as a layer similar to palisade parenchyma in the petioles and stems, the classifications of glandular trichomes, and new types of stomata (anomocytic, anomotetracytic, and brachyparatetracytic) are reported here for the first time for Jacquemontia. The results discussed here help clarify the classification of this species complex and contribute to the taxonomy of Jacquemontia—a genus that has historically been difficult to define due to its wide morphological variation at the species level.Research Highlights Seven types of epicuticular waxes were identified among J. evolvuloides specimens: granules, threads, entire platelets, coiled rodlets, fissured layers, membranous platelets, and tubules. Six types of trichomes were observed among J. evolvuloides populations: stellate, malpighiaceous, sessile peltate glandular, short pedunculate glandular, stipitate‐glandular, and capitate glandular. We observed that six populations of Jacquemontia evolvuloides located in the Brazilian Caatinga domain have unprecedented sessile peltate trichomes restricted to the main leaf midrib, which were only observed under light microscopy.

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Ipomoea lanifolia sp. nov. (Convolvulaceae), a new species endemic to the Ibiapaba plateau in northeastern Brazil

Cited by 2 publications

References 15 publications

The challenges of classifying big genera such as Ipomoea

The challenges of classifying big genera such as Ipomoea

Leaf and stem micromorphology of Jacquemontia evolvuloides (Moric.) Meisn. (Convolvulaceae) populations: New insights for taxonomic classification using light and scanning electron microscopy

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