THIAGO E. C. MENEGUZZO’s research while affiliated with Instituto de Pesquisas Jardim Botânico do Rio de Janeiro and other places

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Publications (13)


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Cyclopogon Guayanensis is an Unusual Orchid With a Generalistic Pollination System and Hexose Dominant Nectar
  • Preprint
  • File available

August 2024

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99 Reads

THIAGO E. C. MENEGUZZO

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SUELI M. GOMES

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JOÃO A. N. BATISTA

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[...]

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Cyclopogon is a large Neotropical orchid genus pollinated by halictid bees that offers nectar as reward. In a recent phylogenetic tree, Brachystele guayanensis emerged nested within Cyclopogon and was transferred to that genus. The hypothesis for this study was that C. guayanensis would show a similar floral biology to Cyclopogon , although distinctive in its small, congested white flowers. Data on floral biology, pollinators, micromorphology, histochemistry, and nectar sugar composition of C. guayanensis in the Distrito Federal, Brazil were gathered. C. guayanensis is pollinated by at least four species of bees belonging to genera Exomalopsis , Nomada , Tetrapedia (Apidae) and Dialictus (Halictidae) foraging for nectar. Nectar is produced in visually imperceptible quantities by papillae on the inner surface of the labellum; similar papillae occur in other species of Cyclopogon but nectar class is unknown. C. guayanensis nectar is hexose dominant (< 10% sucrose) in the Baker and Baker system and is the second record of this nectar class in the Orchidaceae. Pollinia are dorsally adhesive and probably attach to the underside of the bee labrum, as in other Cyclopogon . The inflorescence rachis, bracteoles, and outer surfaces of the base of the sepals are covered with lipid-secreting glandular trichomes; sepals and petals have numerous raphid-rich idioblasts. This is the first record of papillae on a spurless labellum shown to produce nectar in the Orchidoideae. We suggest that hexose dominant nectars in the Orchidaceae are associated with a geophytic habit, small pale flowers, exposed nectaries, visually imperceptible quantities of nectar, and a generalistic pollination system, and coin the term ‘modest pollination strategy’ for this syndrome.

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Brachystele guayanensis is a Cyclopogon (Orchidaceae): notes on its biology and taxonomy

July 2024

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11 Reads

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1 Citation

Phytotaxa

Brachystele guayanensis is hereby transferred to the genus Cyclopogon based on molecular systematics and morphological evidence. The major change in the circumscription of Cyclopogon with the inclusion of this species is an increase in the number of flowers per inflorescence, a reduction in flower size, and the fact that sepals may become petaloid.



A taxonomic overview of Notylia platyglossa Schltr. and related species (Orchidaceae)

June 2024

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31 Reads

Phytotaxa

In this study, through a review of the literature, analysis of protologues, field collections and consultations of herbariums, we elucidated the Notylia platyglossa species complex. We propose the synonymization of the names N. peruviana, N. morenoi under N. platyglossa. Additionally, we designated lectotypes for N. peruviana and N. morenoi as well as neotypes for N. platyglossa and N. boliviensis. We also distinguished N. boliviensis from N. platyglossa and validated the first record of this species for Brazil. Descriptions, taxonomic comments, distribution maps, photographic plates and the conservation status of these species are also presented.



An enlarged circumscription of Bifrenaria (Orchidaceae: Maxillariiinae)

February 2024

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19 Reads

Phytotaxa

A revised delimitation of Bifrenaria broadens the genus to include the previously accepted genera Guanchezia, Horvatia, Hylaeorchis, Rudolfiella, Scuticaria, and Teuscheria. These genera as currently circumscribed are changed to sections, and their respective species transferred or combined along with newly synonymised species. Bifrenaria sect. Stenocoryne and B. sect. Adipe are reinstated, Adipe treated as section, and two new sections are described, as follows: B. sect. Integrilabellae and B. sect. Xylobioides.


Brazilian Flora 2020: Leveraging the power of a collaborative scientific network

March 2022

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2,107 Reads

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2 Citations

Taxon

The shortage of reliable primary taxonomic data limits the description of biological taxa and the understanding of biodiver-sity patterns and processes, complicating biogeographical, ecological, and evolutionary studies. This deficit creates a significant taxo-nomic impediment to biodiversity research and conservation planning. The taxonomic impediment and the biodiversity crisis arewidely recognized, highlighting the urgent need for reliable taxonomic data. Over the past decade, numerous countries worldwidehave devoted considerable effort to Target 1 of the Global Strategy for Plant Conservation (GSPC), which called for the preparationof a working list of all known plant species by 2010 and an online world Flora by 2020. Brazil is a megadiverse country, home to moreof the world’s known plant species than any other country. Despite that, Flora Brasiliensis, concluded in 1906, was the last comprehensive treatment of the Brazilian flora. The lack of accurate estimates of the number of species of algae, fungi, and plantsoccurring in Brazil contributes to the prevailing taxonomic impediment and delays progress towards the GSPC targets. Over the past12 years, a legion of taxonomists motivated to meet Target 1 of the GSPC, worked together to gather and integrate knowledge on thealgal, plant, and fungal diversity of Brazil. Overall, a team of about 980 taxonomists joined efforts in a highly collaborative project thatused cybertaxonomy to prepare an updated Flora of Brazil, showing the power of scientific collaboration to reach ambitious goals.This paper presents an overview of the Brazilian Flora 2020 and provides taxonomic and spatial updates on the algae, fungi, and plantsfound in one of the world’s most biodiverse countries. We further identify collection gaps and summarize future goals that extend be-yond 2020. Our results show that Brazil is home to 46,975 native species of algae, fungi, and plants, of which 19,669 are endemic tothe country. The data compiled to date suggests that the Atlantic Rainforest might be the most diverse Brazilian domain for all plantgroups except gymnosperms, which are most diverse in the Amazon. However, scientific knowledge of Brazilian diversity is still un-equally distributed, with the Atlantic Rainforest and the Cerrado being the most intensively sampled and studied biomes in the coun-try. In times of “scientific reductionism”, with botanical and mycological sciences suffering pervasive depreciation in recent decades,the first online Flora of Brazil 2020 significantly enhanced the quality and quantity of taxonomic data available for algae, fungi, andplants from Brazil. This project also made all the information freely available online, providing a firm foundation for future researchand for the management, conservation, and sustainable use of the Brazilian funga and flora.


Fig. 3. Percentage and numbers of new species of major plant and fungal taxa described between 2015 and 2020 from Brazil. A, Numbers of Brazilian ferns and lycophytes, gymnosperms, and angiosperms described as new to science per year between 2015 and 2020. B, Percentage contribution of angiosperms, algae, fungi, bryophytes, ferns and lycophytes, and gymnosperms described as new to science between 2015 and 2020. Numbers of algae according to ALGAEBASE (https://www.algaebase.org/); Fungi according to recent descriptions available from mycological journals, Index Fungorum (http://www.indexfungorum.org), and Mycobank (https://www.mycobank.org); Bryophytes according to the Index Hepaticarum online (https://www.ville-ge.ch/musinfo/bd/cjb/hepatic/), recent publications and TROPICOS database (https:// www.tropicos.org/name/Search); and angiosperms, gymnosperms, ferns, and lycophytes according to IPNI (International Plant Name Index, https://www.ipni.org/).
Fig. 4. Collaboration of Brazilian Flora Group Taxonomists. World map showing the distribution of the 984 national and international collaborators in the Brazilian Flora 2020 project by country: Argentina (38 taxonomists), Austria (1), Bolivia (1), Brazil (834), Canada (2), Chile (2), Colombia (2), Costa Rica (1), Denmark (1), Ecuador (1), England (12), Finland (1), France (2), Germany (7), Italy (1), Japan (1), Mexico (2), Netherlands (3), Panama (1), Peru (2), Portugal (1), Scotland (5), Spain (4), Sweden (1), Switzerland (1), United States (36), and Venezuela (1). Count performed per institution. Twenty taxonomists have no institution and therefore the sum of countries does not equal the total number of taxonomists.
Top 10 angiosperm families with the greatest species richness in Brazil, showing their total numbers of native and endemic species, based on the BFG (2015) and the Brazilian Flora 2020.
Brazilian Flora 2020: Leveraging the power of a collaborative scientific network

December 2021

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1,296 Reads

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6 Citations

Taxon

The shortage of reliable primary taxonomic data limits the description of biological taxa and the understanding of biodiver-sity patterns and processes, complicating biogeographical, ecological, and evolutionary studies. This deficit creates a significant taxo-nomic impediment to biodiversity research and conservation planning. The taxonomic impediment and the biodiversity crisis arewidely recognized, highlighting the urgent need for reliable taxonomic data. Over the past decade, numerous countries worldwidehave devoted considerable effort to Target 1 of the Global Strategy for Plant Conservation (GSPC), which called for the preparationof a working list of all known plant species by 2010 and an online world Flora by 2020. Brazil is a megadiverse country, home to moreof the world’s known plant species than any other country. Despite that, Flora Brasiliensis, concluded in 1906, was the last comprehensive treatment of the Brazilian flora. The lack of accurate estimates of the number of species of algae, fungi, and plantsoccurring in Brazil contributes to the prevailing taxonomic impediment and delays progress towards the GSPC targets. Over the past12 years, a legion of taxonomists motivated to meet Target 1 of the GSPC, worked together to gather and integrate knowledge on thealgal, plant, and fungal diversity of Brazil. Overall, a team of about 980 taxonomists joined efforts in a highly collaborative project thatused cybertaxonomy to prepare an updated Flora of Brazil, showing the power of scientific collaboration to reach ambitious goals.This paper presents an overview of the Brazilian Flora 2020 and provides taxonomic and spatial updates on the algae, fungi, and plantsfound in one of the world’s most biodiverse countries. We further identify collection gaps and summarize future goals that extend be-yond 2020. Our results show that Brazil is home to 46,975 native species of algae, fungi, and plants, of which 19,669 are endemic tothe country. The data compiled to date suggests that the Atlantic Rainforest might be the most diverse Brazilian domain for all plantgroups except gymnosperms, which are most diverse in the Amazon. However, scientific knowledge of Brazilian diversity is still un-equally distributed, with the Atlantic Rainforest and the Cerrado being the most intensively sampled and studied biomes in the coun-try. In times of “scientific reductionism”, with botanical and mycological sciences suffering pervasive depreciation in recent decades,the first online Flora of Brazil 2020 significantly enhanced the quality and quantity of taxonomic data available for algae, fungi, andplants from Brazil. This project also made all the information freely available online, providing a firm foundation for future researchand for the management, conservation, and sustainable use of the Brazilian funga and flora.


Figura 1: Encyclia fimbriata C.A.Bastos, van den Berg & Meneguzzo
Figura 1: Encyclia yauaperyensis (Barb.Rodr.) Porto & Brade
Encyclia - Coleção Flora do Brasil 2020

December 2021

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149 Reads

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1 Citation

Este tratamento é composto pelos seguintes táxons: Encyclia, Encyclia advena, Encyclia alata, Encyclia alboxanthina, Encyclia andrichii, Encyclia angustifolia, Encyclia argentinensis, Encyclia aspera, Encyclia auyantepuiensis, Encyclia bicalhoi, Encyclia bohnkiana, Encyclia bracteata, Encyclia bragancae, Encyclia chapadensis, Encyclia chloroleuca, Encyclia conchaechila, Encyclia cordigera, Encyclia cyperifolia, Encyclia dichroma, Encyclia diota, Encyclia diurna, Encyclia duveenii, Encyclia fimbriata, Encyclia fowliei, Encyclia gallopavina, Encyclia gonzalezii, Encyclia granitica, Encyclia ionosma, Encyclia jenischiana, Encyclia joaosaiana, Encyclia leucantha, Encyclia linearifolioides, Encyclia mapuerae, Encyclia oliveirana, Encyclia oncidioides, Encyclia osmantha, Encyclia pachyantha, Encyclia patens, Encyclia pauciflora, Encyclia profusa, Encyclia randii, Encyclia seidelii, Encyclia spiritusanctensis, Encyclia thienii, Encyclia unaensis, Encyclia viridiflora, Encyclia xerophytica, Encyclia yauaperyensis. COMO CITAR Bastos, C.A., Meneguzzo, T.E.C., van den Berg, C. 2020. Encyclia in Flora do Brasil 2020. Jardim Botânico do Rio de Janeiro. Disponível em: http://floradobrasil.jbrj.gov.br/reflora/floradobrasil/FB11498



Citations (5)


... This scenario suggests the occurrence of parallel evolution of vegetative and oral characters between different lineages of the Spiranthinae that have caused them to be put into the same genus based on morphological characters (e.g., Szlachetko and Rutkowski 2008). Brachystele guayanensis has been recently transferred to Cyclopogon (Meneguzzo et al. 2024) based on molecular, morphological and the ecological results that are presented here. ...

Reference:

Cyclopogon Guayanensis is an Unusual Orchid With a Generalistic Pollination System and Hexose Dominant Nectar
Brachystele guayanensis is a Cyclopogon (Orchidaceae): notes on its biology and taxonomy
  • Citing Article
  • July 2024

Phytotaxa

... Closes are drawn for the further improvement of the speculation too regarding definite investigation and instructive practice. (Group et al., 2022) Online clients find it hard to envision how items will squeeze into their surroundings, which expands their mental burden. Mental burden hypothesis holds that individuals' mental assets are restricted. ...

Brazilian Flora 2020: Leveraging the power of a collaborative scientific network

Taxon

... Among angiosperms, the Orchidaceae family is one of the most diverse groups with 29 524 accepted species occurring in a wide range of habitats (Christenhusz & Byng 2016, Govaerts et al. 2021. In Brazil, it is estimated that nearly 2 692 native species occur in all national biomes, with approximately 1 490 endemic species rarely studied scientifically (The Brazil Flora Group et al. 2021). The genus Cattleya is restricted to the Neotropics and is highly diverse in Brazil, with approximately 144 species and 89 natural hybrids (van den Berg 2020). ...

Brazilian Flora 2020: Leveraging the power of a collaborative scientific network

Taxon

... The watershed encompasses an area of approximately 521,000 square kilometres (km²) and is situated in the eastern part of the Amazon Basin (Fearnside, 2001). This region is known for its high biodiversity, hosting numerous plant and animal species found nowhere else on Earth (Fonseca et al., 2019). The Xingu River, which runs through the watershed, is a major tributary of the Amazon River, contributing significant freshwater input to the Amazon Basin. ...

Brazilian Flora 2020: Innovation and collaboration to meet Target 1 of the Global Strategy for Plant Conservation (GSPC)

Rodriguesia