Two new species of Janusia (Malpighiaceae) from Brazil

Sebastiani, Renata; Mamede, Maria Cândida Henrique

doi:10.1590/s2236-89062014000100011

Cited by 5 publications

(3 citation statements)

References 2 publications

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“…material 1 ) of shrubs or lianas endemic to rainforests, savannas, and seasonally dry tropical forests of Bolivia, Brazil, and Paraguay, South America ( POWO 2024 ). For an identification key for all species of Schwannia , see Sebastiani (2010) and Sebastiani and Mamede (2014) , both under Janusia .…”

Section: Resultsmentioning

confidence: 99%

A new classification system and taxonomic synopsis for Malpighiaceae (Malpighiales, Rosids) based on molecular phylogenetics, morphology, palynology, and chemistry

de Almeida,

de Morais,

Alves-Silva

et al. 2024

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Malpighiaceae has undergone unprecedented changes in its traditional classification in the past two decades due to several phylogenetic studies shedding light on the non-monophyly of all subfamilies and most tribes and genera. Even though morphological characters were used to reconstruct the last molecular generic phylogeny of Malpighiaceae, a new classification system has never been proposed for this family. Based on a comprehensive review of the last twenty years of published studies for this family, we propose a new classification system and provide a taxonomic synopsis for Malpighiaceae based on molecular phylogenetics, morphology, palynology, and chemistry as a baseline for the systematics, conservation, and taxonomy of this family worldwide. Malpighiaceae currently comprises two subfamilies (Byrsonimoideae and Malpighioideae), 12 tribes ( Acmanthereae , Acridocarpeaetrib. nov., Barnebyeaetrib. nov., Bunchosieaetrib. nov., Byrsonimeae, Galphimieae, Gaudichaudieae, Hiptageae, Hiraeeae, Malpighieae, Mcvaughieaetrib. nov., and Ptilochaeteaetrib. nov.), 72 genera (incl. Mamedeagen. nov.), and 1,499 accepted species (715 of which are currently under some kind of extinction threat). We present identification keys for all subfamilies, tribes, and genera, a full morphological description for the proposed new genus, the re-circumscription of ten genera alongside the needed new combinations, the proposition of several new synonyms, the typification of several names, and notes on the taxonomy, distribution, conservation, and ecology up to the genus rank. Morphological plates are also provided to illustrate the immense diversity of morphological traits used in the new classification and synopsis.

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Section: Resultsmentioning

confidence: 99%

A new classification system and taxonomic synopsis for Malpighiaceae (Malpighiales, Rosids) based on molecular phylogenetics, morphology, palynology, and chemistry

de Almeida,

de Morais,

Alves-Silva

et al. 2024

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“…Janusia comprises 15 species distributed in cerrado, seasonally dry tropical forest, and tropical rain forest in South America (Sebastiani , Sebastiani and Mamede ). All species are recorded for Brazil, with eight species reaching the Atlantic Forest, occurring in rain forest, seasonally dry forest, and restinga (Sebastiani , Almeida and Amorim , Almeida and Mamede , BFG , Sebastiani and Mamede , Silva and Almeida ).…”

Section: Methodsmentioning

confidence: 99%

“…Its level of endemism reaches 90% for some organisms, and only the Amazon Forest surpasses its overall 50% average endemism (Costa et al ). Despite the high degree of fragmentation and habitat loss, over the past 30 years many species have been described from this area (Morellato and Haddad ), including about 50 species of Malpighiaceae (Anderson and Gates , Anderson C. E. , , , , , , , , , , Anderson W. R. , , , , , , , Anderson and Davis , , , Amorim , , , , Sebastiani and Mamede , , Amorim and Almeida , Almeida and Amorim ).…”

Section: Methodsmentioning

confidence: 99%

A generic synopsis of Malpighiaceae in the Atlantic Forest

Almeida

Francener

Amorim

2016

Nordic Journal of Botany

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Malpighiaceae is one of the major families of tropical and subtropical lianas, easily recognized in the field due to its remarkable flower conservatism. The family has been the subject of different phylogenetic studies over the past fifteen years, which have demonstrated the paraphyly of its subfamilies, most of its tribes, and some of its largest genera. Some of the most drastic changes have occurred in Mascagnia and Tetrapterys, where ten genera were segregated (eight of them new) making it difficult for general botanists to reassign many commonly known species. As a first attempt to clarify most of the recent generic changes within the family, we present a taxonomic synopsis of Malpighiaceae from the Atlantic Forest in Brazil and Argentina, including an illustrated key, morphological generic descriptions, an updated checklist of species for each genera, and figures of all genera found in this biome.

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Palynological study of Janusia A. Juss. and related genera (Malpighiaceae)

2014

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This paper presents a palynological study of 14 Janusia species and seven species belonging Aspicarpa, Camarea and Cottsia to contribute to the taxonomic study of the Gaudichaudieae tribe. The pollen grains were examined under optical and scanning electron microscopy. The pollen grains are generally spheroidal or cuboidal, medium to large, 6-8-porate and display variable colpoids and ornamentations. Janusia pollen grains vary in their quantitative characteristics, apertures and ornamentation. In some Janusia species, we observed the presence of a lipid substance on the pollen grains, likely pollenkitt. The pollen morphology of the cleistogamic flowers of Janusia guaranitica is clearly distinct from the pollen grains of chasmogamous flowers in all species analysed. Janusia anisandra, Janusia caudata and Janusia christianeae possess harmomegathic mechanisms, and the presence of colpoids also in J. guaranitica (chasmogamous flower) may suggest a direct relationship between these species, although their presence is more frequent in more humid areas. The results of palynological analysis suggest that the studied genera cannot be delimited using palynological characteristics but that they may be helpful to distinguish among genera.

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Two new species of Janusia (Malpighiaceae) from Brazil

Cited by 5 publications

References 2 publications

A new classification system and taxonomic synopsis for Malpighiaceae (Malpighiales, Rosids) based on molecular phylogenetics, morphology, palynology, and chemistry

A new classification system and taxonomic synopsis for Malpighiaceae (Malpighiales, Rosids) based on molecular phylogenetics, morphology, palynology, and chemistry

A generic synopsis of Malpighiaceae in the Atlantic Forest

Palynological study of Janusia A. Juss. and related genera (Malpighiaceae)

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