Comparative phylogeography in the Atlantic forest and Brazilian savannas: pleistocene fluctuations and dispersal shape spatial patterns in two bumblebees

Background: Bombus morio and B. pauloensis are sympatric widespread bumblebee species that occupy two major Brazilian biomes, the Atlantic forest and the savannas of the Cerrado. Differences in dispersion capacity, which is greater in B. morio, likely influence their phylogeographic patterns. This study asks which processes best explain the patterns of genetic variation observed in B. morio and B. pauloensis, shedding light on the phenomena that shaped the range of local populations and the spatial distribution of intra-specific lineages. Results: Results suggest that Pleistocene climatic oscillations directly influenced the population structure of both species. Correlative species distribution models predict that the warmer conditions of the Last Interglacial contributed to population contraction, while demographic expansion happened during the Last Glacial Maximum. These results are consistent with physiological data suggesting that bumblebees are well adapted to colder conditions. Intra-specific mitochondrial genealogies are not congruent between the two species, which may be explained by their documented differences in dispersal ability. Conclusions: While populations of the high-dispersal B. morio are morphologically and genetically homogeneous across the species range, B. pauloensis encompasses multiple (three) mitochondrial lineages, and show clear genetic, geographic, and morphological differences. Because the lineages of B. pauloensis are currently exposed to distinct climatic conditions (and elevations), parapatric diversification may occur within this taxon. The eastern portion of the state of São Paulo, the most urbanized area in Brazil, represents the center of genetic diversity for B. pauloensis

Taxonomic revision and phylogeny of Bignonia L. (Bignonieae, Bignoniaceae)

Bignonia, o quinto maior gênero da tribo Bignonieae (Bignoniaceae), é caracterizado por apresentar ramos com cunhas de floema em múltiplo de quatro, folhas 2-folioladas, gavinhas geralmente simples, flores com corola achatada e sem disco nectarífero, e sementes com alas opacas. A atual circunscrição é baseada num recente estudo filogenético que congregou 28 espécies anteriormente posicionadas em oito diferentes gêneros. Esta união tornou Bignonia um grupo complexo, com ampla variação morfológica, criando um grande desafio taxonômico. Assim, os objetivos foram revisar a taxonomia do gênero e reconstruir sua filogenia baseada em caracteres moleculares, incluindo sequenciamento em larga escala, para melhor compreender o grupo. Com o tratamento taxonômico apresentado aqui, são reconhecidas 30 espécies, duas das quais descritas como novas, uma reestabelecida e outra sinonimizada. Foram encontrados dez clados, todos suportados por sinapomorfias morfológicas, que são a base da classificação subgenérica proposta. Os resultados gerados aqui fornecerão subsídios para um futuro estudo evolutivo e biogeográficoBignonia, the fifth largest genus in the tribe Bignonieae (Bignoniaceae), is characterized by stems with phloem wedges in multiple of four, leaves 2-foliolated, tendrils usually simple, flowers with dorso-ventrally flattened corolla and absent nectariferous disk, and seed with opaque wings. The current circumscription is based on a recent phylogenetic study that congregated 28 species previously placed in eight different genera. This unification made Bignonia a complex group, with a wide morphological range, which created a big taxonomic challenge. In this manner, the objectives were to review the taxonomy of the genus and to reconstruct its phylogeny using molecular characters, including high throughput sequencing, to better understand this group. With the taxonomic treatment presented here, 30 species are recognized, two of these described as new, one reestablished and another synonymized. Ten clades were obtained, all supported by morphological characters, are the base for the subgeneric classification proposed. The results presented here will provide the base for future evolutionary and biogeographic stud

Getting useful information from RNA-seq contaminants: a case of study in the oil-collecting bee tetrapedia diversipes transcriptome

Sem informação208491492FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP2013/12530-4; 2012/18531-

Getting Useful Information from RNA-Seq Contaminants: A Case of Study in the Oil-Collecting Bee Tetrapedia diversipes Transcriptome

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Evolutionary perspectives on bee mtDNA from mito-OMICS analyses of a solitary species

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Taxonomy and nomenclature of Aspidosperma (Apocynaceae).

Aspidosperma is one of the most diverse and economically relevant taxa within Apocynaceae, leading to several taxonomic studies being carried out with the genus. However, since its species number varies widely depending on the treatment, questions regarding which species ought to be recognized in the genus are frequent. We addressed all names and designations in Aspidosperma and proposed 19 new synonyms, six neotypes, 59 lectotypes, and 15 second-step lectotypes. We also created an online interactive identification key for the 80 recognized species of Aspidosperma

Evolutionary perspectives on bee mtDNA from mito-OMICS analyses of a solitary species

info:eu-repo/semantics/publishe