Cássio Van Den Berg | Universidade Estadual de Feira de Santana (original) (raw)

Papers by Cássio Van Den Berg

Australian Systematic botany, 2024

Different views on recognising taxa associated with the Campomanesia xanthocarpa group (Myrtaceae... more Different views on recognising taxa associated with the Campomanesia xanthocarpa group (Myrtaceae) demonstrate the difficulties in clearly delimiting species. Studies using Inter Simple Sequence Repeats (ISSR) molecular markers were carried out on 201 individuals from 13 populations of C. xanthocarpa Mart. ex O.Berg, C. adamantium (Cambess.) O.Berg, C. costata M.Ibrahim & Landrum and C. littoralis D.Legrand in an attempt to improve understanding of species boundaries between these species. SplitsTree, analysis of molecular variance (AMOVA), principal component analysis (PCA), Neighbour-Joining (NJ) dendrogram and STRUCTURE showed inconsistencies between morphological and genetic data in these taxa. Therefore C. adamantium and C. xanthocarpa are treated as distinct taxa in this study, as are C. costata, C. littoralis and C. rhombea O.Berg that were previously considered part of C. xanthocarpa. Structured populations in C. adamantium were not congruent with taxonomic data or poorly supported in the data analysed. These were maintained as a single polymorphic species and new integrative approaches are necessary to improve understanding of taxon boundaries. We present a taxonomic treatment based on these decisions. This study contributes to the systematic treatment of Campomanesia and encourages specific delimitation studies to resolve remaining taxonomic issues within the genus.

Diversity, 2024

We present a dated and calibrated molecular phylogeny for one of the most characteristic genera o... more We present a dated and calibrated molecular phylogeny for one of the most characteristic
genera of Neotropical savannas, Byrsonima (Malpighiaceae), based on the ETS, ITS, and psbA-trnH
markers. We sampled 33 species of Byrsonima and four species of the outgroups Blepharandra, Diacidia,
and Pterandra to test the monophyly of the infrageneric classification of the genus. Bayesian inference
(BI) analysis was performed for the combined molecular dataset. Seven morphological characters
were optimized on the obtained tree. Calibration points derived from a published chronogram for
Malpighiaceae were used alongside a relaxed, uncorrelated molecular clock on Beast 1.8.4. Ancestral
range reconstructions focusing on four main Neotropical biomes (Cerrado, Atlantic rainforest, Ama-
zon rainforest, and Caatinga dry forests) were performed on BioGeoBEARS. Our phylogenetic results
corroborated the monophyly of Byrsonima, but all of its subgenera and sections were polyphyletic,
with all morphological characters circumscribing these infrageneric ranks being highly homoplas-
tic. The most recent common ancestor of Byrsonima was widespread in South American biomes at
11.41 Ma, posteriorly diversifying in the Amazon rainforests up to 7.72 Ma, when it started massively
diversifying in Neotropical savannas. A few re-colonization events from savannas to rain or dry
forests occurred from 2.95–0.53 Ma. These results corroborate the mid-Miocene origins of Neotropical
savannas, and future studies should aim to sample Mesoamerican species of Byrsonima.

Phytotaxa, Dec 16, 2016

Pleroma rubrum (Melastomataceae, Melastomeae), a new shrubby species endemic to rocky outcrops of... more Pleroma rubrum (Melastomataceae, Melastomeae), a new shrubby species endemic to rocky outcrops of Chapada Diamantina, northeastern Brazil, is here described, illustrated and compared with closely related taxa. The new taxon is easily distinguished, within the Tibouchina pereirae species complex, by its quadrangular distal branches with a crown of long hirsute trichomes around nodes, leaves elliptic-lanceolate with reddish margins and petioles, reddish inflorescence and bracteoles, colored stipitate glands on all reproductive structures, except the pedoconnectives, involucral bracteoles, and urceolate capsules.

Annals of Botany, Sep 20, 2011

Background and Aims Capanemia Barb. Rodr. comprises seven species that mostly inhabit the Brazili... more Background and Aims Capanemia Barb. Rodr. comprises seven species that mostly inhabit the Brazilian Atlantic Rain Forest domain. The genus currently consists of two sections: Capanemia Cogn. and Planifolia Pabst, distinguished on the basis of leaf shape. We compare the floral morphology and anatomy of all species to determine whether separation into sections is supported by floral characters. † Methods Both fresh flowers and herbarium specimens were investigated, and column and pollinarium features, together with the presence or absence of floral rewards, recorded. Anatomical features were examined using both light microscopy and scanning electron microscopy. † Key Results and Conclusions With the sole exception of Capanemia therezae, all species shared a distinctive set of floral characters. Flowers were mostly white or yellowish-white and fragrant, and column wings were positioned parallel to the labellum, concealing the stigmatic cavity. Pollinaria had proportionally long tegular stipes and clavate to reniform pollinia, whereas the labellum possessed a conspicuous indument of trichomes, but was devoid of nectar or any other secretion that might function as a food-reward. Capanemia therezae, however, was exceptional in having greenish, unscented flowers with short, rounded and divergent column wings and an exposed stigmatic cavity. Its pollinaria had proportionally short tegular stipes and round pollinia, whereas the labellum lacked trichomes. Droplets of nectar were evident on the adaxial surface of the labellum, adjacent to the callus. Floral features did not support the currently accepted sectional division of Capanemia. If ongoing phylogenetic studies demonstrate that both sections are indeed monophyletic, then these taxa should be distinguished solely on the basis of foliar features.

Plant Systematics and Evolution, Apr 29, 2004

The orchid genus Calopogon contains five species, the widespread C. tuberosus containing three va... more The orchid genus Calopogon contains five species, the widespread C. tuberosus containing three varieties. The members of this small genus have a history of circumscriptional uncertainty, suggesting the need for further taxonomic evaluation. To determine characters distinguishing different groups and to examine their circumscription, we performed morphometric analyses on two different subsets of Calopogon, one of all the currently recognized species of the genus and another of only C. tuberosus, based on 40 vegetative and floral variables measured from live plants. Principal components analyses (PCA) generally did not detect highly distinct groups, but canonical variate analyses (CVA) identified numerous characters that readily distinguish most of these groups, the least distinguishable of these being C. tuberosus var. latifolius. Furthermore, generalized patterns of similarity between taxonomic and geographic subdivisions within C. tuberosus were further examined on a plant-by-plant basis using squared Mahalanobis distances determined from the CVA of this species. Finally, using three different tests, the degree of morphological diversity was examined for each of the different groups of C. tuberosus, finding that the northern range of the species contained less diversity whereas the southern range generally contained more. We maintain the recognition of all Calopogon taxa except C. tuberosus var. latifolius, and do not recognize any new taxa based on our examinations of geographic partitions of the typical variety of C. tuberosus. However, morphology was observed to vary substantially over the geographic range of the typical variety and this species overall.

Phytotaxa, Nov 21, 2014

A new classification for the 114 species Cattleya is proposed, based on and compatible with previ... more A new classification for the 114 species Cattleya is proposed, based on and compatible with previously published nuclear, plastid and combined phylogenetic trees. Cattleya is divided into four subgenera, three sections and five series. A key to the infrageneric categories and a table listing all species and their placement is presented.

Neodiversity

In this paper I propose two new combinations in Cattleya and one in Laelia which are required to ... more In this paper I propose two new combinations in Cattleya and one in Laelia which are required to include the affected taxa in the Flora e Funga do Brasil online project.

Plant Species Biology, 2022

The pollination process and breeding system of Pachygenium bonariense and Pachygenium pteryganthu... more The pollination process and breeding system of Pachygenium bonariense and Pachygenium pteryganthum were documented for native populations from Rio Grande do Sul, Brazil. The flowers secrete nectar (on average with 65% to 67% of the concentration of total sugars), which is concealed into an incurved spur. Both species are pollinated by native, large Apidae bees, and the pollinaria adhere under the ventral surface of their labrum while bees try to reach the nectar. P. bonariense is pollinated by native bumblebees Bombus (Fervidobombus) morio and P. pteryganthum by females of oil‐gathering Centris (Melacentris) sp. Both orchid species are self‐compatible but pollinator‐dependent (i.e., unable to set fruit and seed in the absence of pollinators). They also displayed high natural reproductive success (from 22% to 90%) and Nilsson's male efficiency factors ranging from 2.2 to 3.6, suggesting that, during our observations, more than one flower was pollinated for each flower acting as t...

LAELIINAE ARE AN EXCLUSIVELY Neotropical subtribe that has been a primary focus of attention by o... more LAELIINAE ARE AN EXCLUSIVELY Neotropical subtribe that has been a primary focus of attention by orchid taxonomists and collectors since the 19th century. They include many ornamental genera, such as Laelia and Cattleya, and are one of the largest subtribes of ...

Plant Systematics and Evolution, May 25, 2005

In this study we present a survey on vegetative anatomy in species of Actinocephalus, Blastocaulo... more In this study we present a survey on vegetative anatomy in species of Actinocephalus, Blastocaulon, Eriocaulon, Leiothrix, Paepalanthus, Philodice, Syngonanthus, and Tonina (Eriocaulaceae). Multivariate analyses were used to correlate anatomical characters to taxa and the habitats where the species occur. Root and stem anatomical characters seem to be more affected by environmental factors where these species occur, and seem of little value for delimiting major taxonomic groups within the family. Other characters in the leaves, such as epidermis with thickened wall cells, compartmented substomatal chambers, mesophyll with hypodermis, compact chlorenchyma, collenchymatous bundle sheath extensions, and numerous vascular bundles, were shown to be important for defining species clusters in Leiothrix, Syngonanthus, and Paepalanthus subg. Platycaulon. Similarly, loosely aggregated chlorenchyma caused Blastocaulon, Eriocaulon, Philodice, Syngonanthus sect. Carpocephalus, S. sect. Syngonanthus, and Tonina, genera from humid environments, to cluster. Scape characters appear to be more informative in discriminating groups. This situation probably reflects lower selection pressures determining anatomical characters of this organ.

Brazilian Journal of Botany, Sep 1, 2006

Evidence of natural hybridization and introgression in Bulbophyllum involutum Borba, Semir & ... more Evidence of natural hybridization and introgression in Bulbophyllum involutum Borba, Semir & F. Barros and B. weddellii (Lindl.) Rchb. f. (Orchidaceae) in the Chapada Diamantina, Brazil, by using allozyme markers). Hybridization between B. involutum and B. weddellii (Orchidaceae) has been first observed in the Serra do Cipo, Minas Gerais State, Brazil, the hybrid being described as B. ×cipoense Borba & Semir. In this study, allozime electrophoresis was used to test the hypothesis of occurrence of hybridization between these two species, as suggested by morphological characters, in the Chapada Diamantina, Bahia State, Brazil. The lack of a diagnostic locus does not allow definite confirmation of the natural hybridization, although this hypotheses is reinforced by the absence of exclusive alleles in the putative hybrid individuals. The existence of several different genotypes points out to either population derived from multiple hybridization events or the hybrids produced offspring. Homozigosity in some morphologically intermediate individuals of alelles which are exclusive to B. involutum and high genetic similarity between them reinforce the hypotheses of introgression in B. involutum, but not in B. weddellii. Genetic variability observed in B. weddellii (He = 0.21) and B. involutum (He = 0.35) is high. Bulbophyllum weddellii and B. involutum presented very high genetic similarity values (0.94). These species, although vegetatively similar, have been placed in different sections based on floral morphology. The results suggest that these species may be more related than previously supposed. RESUMO - (Evidencia de hibridacao e introgressao em Bulbophyllum involutum Borba, Semir & F. Barros e B. weddellii (Lindl.) Rchb. f. (Orchidaceae) na Chapada Diamantina, Brasil, a partir de marcadores alozimaticos). Hibridacao entre B. involutum e B. weddellii (Orchidaceae) foi observada pela primeira vez na Serra do Cipo, Estado de Minas Gerais, Brasil, o hibrido sendo descrito como B. ×cipoense Borba & Semir. Neste estudo, foi utilizada eletroforese de alozimas para testar a hipotese de ocorrencia de hibridacao entre estas especies, como sugerido por caracteres morfologicos, na Chapada Diamantina, Estado da Bahia, Brasil. A falta de um locus diagnostico nao permite confirmacao definitiva da hibridacao natural, embora esta hipotese seja reforcada pela ausencia de alelos exclusivos nos individuos supostamente hibridos. A existencia de varios genotipos diferentes indica que ou a populacao e derivada de multiplos eventos de hibridacao, ou que os hibridos estao se reproduzindo. Homozigose em alguns individuos morfologicamente intermediarios de alelos exclusivos a especie B. involutum e a elevada similaridade genetica entre eles reforcam a hipotese de introgressao em B. involutum, mas nao em B. weddellii. A variabilidade genetica observada em B. weddellii (He = 0,21) e B. involutum (He = 0,35) e elevada. Bulbophyllum weddellii e B. involutum apresentaram valor de similaridade genetica muito elevado (0,94). Estas especies, embora vegetativamente muito similares, tem sido colocadas em diferentes secoes baseado na morfologia floral. Os resultados encontrados sugerem que estas especies sao mais relacionadas do que previamente suposto. Palavras-chave - Bulbophyllum, hibridacao, introgressao, Orchidaceae, variabilidade genetica

Botanical Journal of the Linnean Society, Apr 12, 2023

The early-branching clades of Fabaceae subfamily Papilionoideae are characterized by their remark... more The early-branching clades of Fabaceae subfamily Papilionoideae are characterized by their remarkable lability in floral architecture. In contrast, more derived papilionoid lineages are marked by evolutionary conservatism towards strongly bilateral, papilionate flowers. Here, we show an unexpected example of conservatism of a unique floral architecture during the early diversification history of the papilionoids. We built the most comprehensively sampled molecular phylogenetic tree with a focus on the early-diverging papilionoid Dipterygeae clade to evaluate conservatism of the winged papilionate architecture and associated traits related to flower specialization (e.g. zygomorphy, petal differentiation, stable stamen number and stamen sheath). Dipterygeae comprise c. 22 species of mostly giant trees from across tropical forests in Central America and the Amazon, but they are also ecologically dominant in the savannas of the Brazilian Central Plateau. Phylogenetic analyses of nuclear ribosomal ITS/5.8S and plastid matK and trnL intron sequences strongly supported inter-relationships and the monophyly of each genus (Dipteryx, Monopteryx, Pterodon and Taralea). Bayesian relaxed-clock dating and a Bayesian model of ancestral character estimation revealed c. 30 Myr of conservatism of all winged papilionate-related flower traits in a clade comprising the most recent common ancestor of Dipteryx, Pterodon and Taralea, but lability in fruit morphology during the diversification of the entire Dipterygeae clade. Despite Monopteryx and remaining Dipterygeae being florally discrepant, they are collectively defined by a floral synapomorphy that is unique among all papilionoid Fabaceae: the highly differentiated calyx, where the two upper lobes are enlarged and wing-like, whereas the other three lower lobes are reduced. We suggest that the different dispersal strategies and the ancient winged papilionate floral conservatism in Dipterygeae, which has maintained effective ecological interactions with specialized pollinators and ensured the protection of young flower buds and developing fruits, may explain successful evolutionary and ecological persistence of the clade across the main Neotropical biomes.

Phytotaxa, Apr 7, 2020

In the present paper we provide lectotypifications for the names Prosthechea bohnkiana, P. carrii... more In the present paper we provide lectotypifications for the names Prosthechea bohnkiana, P. carrii, and P. elisae, and epitypes for the first two. These typifications were necessary due to gross disagreement between the available specimens and the data provided by the authors in the protologues of these names.

Research Square (Research Square), Mar 13, 2023

The present study evaluated the population structure and genetic diversity using ISSR molecular m... more The present study evaluated the population structure and genetic diversity using ISSR molecular markers in 18 natural populations belonging to three species of Eplingiella (E. cuniloides, E. fruticosa and E. brightoniae), found growing naturally in the semiarid region of Northeast Brazil. Samples of 265 plants were analyzed using nine primer combinations, which generated 131 informative bands. Eplingiella spp. populations showed moderate genetic diversity (percentage of polymorphic bands, PPB = 75.6-96.9%, Nei's genetic diversity He = 0.31-0.39, Shannon's information index I = 0.33-0.48). Molecular variance analysis (AMOVA) revealed that within populations, variations contributed more (74%) to the genetic diversity than between population variations (26%), with percentage of the genetic differentiation coe cient (G ST = 0.29). The mean value of F ST was 0.175, demonstrating good differentiation between populations. The analysis of the structure by the Bayesian method revealed the formation of two groups (K = 2), with many migrant individuals and a high level of miscegenation. The hierarchical cluster dendrogram grouped the 18 populations into two major clusters, with good support for the main clades (100%). According to principal component analysis (PCA), the two main principal components explained 21.06% of the total variation. The ISSR molecular markers used were effective in identifying the variability of natural populations of Eplingiella spp., and population structure demonstrated recent diversi cation of species. The results shed more light on the genetic variation and evolutionary dynamics of Eplingiella, helping to formulate effective breeding strategies.

Nordic Journal of Botany, 2021

In the past two decades, Malpighiaceae has gone through unprecedented changes in classification d... more In the past two decades, Malpighiaceae has gone through unprecedented changes in classification due to molecular phylogenetic studies. However, some generic adjustments are still needed to make all genera monophyletic. In this study, we propose the new genus Glicophyllum to accommodate the species of Tetrapterys pro parte, a well‐supported lineage recovered by us and by the most recent phylogenetic studies of the family. Additionally, we propose the synonymy of Aenigmatanthera under Niedenzuella to finally render the latter monophyletic. Morphological characters related to inflorescence architecture, bract and bracteole size, presence of glands on the bracts and bracteoles, style size and thickness, and ratio length among superior and anterior lateral wings of mericarps are important for circumscribing these lineages.

Acta Botanica Brasilica, 2022

Phytotaxa, Jan 4, 2012

A new orchid species from Brazil, Encyclia fimbriata, is described and illustrated. It is known o... more A new orchid species from Brazil, Encyclia fimbriata, is described and illustrated. It is known only from montane rain forest in southern Bahia. Flower morphology, especially the fringed midlobe of the labellum, crested callus and teeth of the clinandrium, distinguish it from any other species of the genus.

Australian Systematic botany, 2024

Diversity, 2024

Phytotaxa, Dec 16, 2016

Annals of Botany, Sep 20, 2011

Plant Systematics and Evolution, Apr 29, 2004

Phytotaxa, Nov 21, 2014

Neodiversity

Plant Species Biology, 2022

Plant Systematics and Evolution, May 25, 2005

Brazilian Journal of Botany, Sep 1, 2006

Botanical Journal of the Linnean Society, Apr 12, 2023

Phytotaxa, Apr 7, 2020

Research Square (Research Square), Mar 13, 2023

Nordic Journal of Botany, 2021

Acta Botanica Brasilica, 2022

Phytotaxa, Jan 4, 2012

Coleção Flora do Brasil, 2021

Este tratamento é composto pelos seguintes táxons: Cattleya, Cattleya aclandiae, Cattleya acuensi... more Este tratamento é composto pelos seguintes táxons: Cattleya, Cattleya aclandiae, Cattleya acuensis, Cattleya alaorii, Cattleya
alvarenguensis, Cattleya alvaroana, Cattleya amethystoglossa, Cattleya angereri, Cattleya araguaiensis, Cattleya aromatica,
Cattleya bicalhoi, Cattleya bicolor, Cattleya blumenscheinii, Cattleya bradei, Cattleya brevicaulis, Cattleya briegeri, Cattleya
campaccii, Cattleya caulescens, Cattleya cernua, Cattleya cinnabarina, Cattleya coccinea, Cattleya colnagoi, Cattleya crispa,
Cattleya crispata, Cattleya cruziana, Cattleya dichroma, Cattleya dormaniana, Cattleya elongata, Cattleya endsfeldzii, Cattleya
esalqueana, Cattleya flavasulina, Cattleya forbesii, Cattleya fournieri, Cattleya ghillanyi, Cattleya gloedeniana, Cattleya grandis,
Cattleya granulosa, Cattleya guaicuhyensis, Cattleya guanhanensis, Cattleya guttata, Cattleya haroldoi, Cattleya harpophylla,
Cattleya harrisoniana, Cattleya hatae, Cattleya havenithii, Cattleya hoehnei, Cattleya intermedia, Cattleya itambana, Cattleya
jenmanii, Cattleya jongheana, Cattleya kautskyana, Cattleya kerrii, Cattleya kettieana, Cattleya kleberi, Cattleya labiata,
Cattleya lawrenceana, Cattleya liliputana, Cattleya lobata, Cattleya locatellii, Cattleya loddigesii, Cattleya longipes, Cattleya
lourdesiana, Cattleya luetzelburgii, Cattleya lundii, Cattleya luteola, Cattleya macrobulbosa, Cattleya mantiqueirae, Cattleya
marcaliana, Cattleya milleri, Cattleya mirandae, Cattleya munchowiana, Cattleya neocardimii, Cattleya neokautskyi, Cattleya
nevesii, Cattleya nobilior, Cattleya novyi, Cattleya pabstii, Cattleya pendula, Cattleya perrinii, Cattleya pfisteri, Cattleya
porphyroglossa, Cattleya praestans, Cattleya presidentensis, Cattleya pumila, Cattleya purpurata, Cattleya pygmaea, Cattleya
reginae, Cattleya rupestris, Cattleya schilleriana, Cattleya sincorana, Cattleya tenebrosa, Cattleya tenuis, Cattleya tereticaulis,
Cattleya tigrina, Cattleya vandenbergii, Cattleya vasconcelosiana, Cattleya velutina, Cattleya verboonenii, Cattleya violacea,
Cattleya virens, Cattleya walkeriana, Cattleya wallisii, Cattleya warneri, Cattleya wittigiana, Cattleya xanthina, Cattleya
×dolosa, Cattleya ×hybrida.
COMO CITAR
van den Berg, C. 2020. Cattleya in Flora do Brasil 2020. Jardim Botânico do Rio de Janeiro. Disponível em: http://
floradobrasil.jbrj.gov.br/reflora/floradobrasil/FB11329

Orchidaceae checklist for colombia