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Ribeira do Pombal, Brazil

Sobral M.,DCNAT | Kollmann L.J.C.,Museu de Biologia Mello Leitao | Rochelle A.L.C.,University of Campinas | Da Costa Souza M.,Federal Rural University of Rio de Janeiro | And 2 more authors.
Journal of the Botanical Research Institute of Texas

We here describe, illustrate, and evaluate the conservation status of five new species from southeastern Brazil: Calyptranthes solitaria, C. ubatubana, Eugenia dipetala, Myrcia cacuminis, and Plinia ambivalens. Calyptranthes solitaria, collected in the states of Minas Gerais, Rio de Janeiro, and São Paulo, is apparently related to Calyptranthes tricona, from which it is kept apart by the uniflorous inflorescences and glabrous adult leaves. Calyptranthes ubatubana is apparently restricted to the state of São Paulo and is related to Calyptranthes lanceolata, from which it is distinguished by its pilose inflorescences and flowers. Eugenia dipetala and Myrcia cacuminis are from the state of Espírito Santo. Eugenia dipetala is distinguished from other Brazilian species by flowers showing two petals; Myrcia cacuminis is related to M. capitata, from which it is distinguished by the petiolate leaves, lanceolate blades, and triflorous inflorescences. Plinia ambivalens, from Espírito Santo and Bahia, is related to Plinia involucrata, from which it differs by the leaves with larger petioles, venose blades, and ovaries with multiovulate locules. © 2014, Botanical Research Institute of Texas Inc. All rights reserved. Source

Kollmann L.J.C.,Museu de Biologia Mello Leitao | Freitas J.,Federal University of Espirito Santo

Kiew (2001) described twelve species of Begonia L. (1753: 1056) (Begoniaceae C. Agardh (1824: 200) to Borneo, Malaysia, among them B. urunensis Kiew (2001: 283) for Pensiangan District, Batu Urun, on Sabah. The author mentioned two herbaria (SAN and SING) as collections that possessed the type material deposited. Because these specimens are syntypes (Art. 9.5 of the Melbourne Code, McNeill et al. 2012), the aim of this note is designated a specimen as lectotype of this name. © 2016 Magnolia Press. Source

Freitas J.,Museu de Biologia Mello Leitao | de Lirio E.J.,Institute Pesquisas Jardim Botanico Do Rio Of Janeiro | Gonzalez F.,National University of Colombia

We describe and illustrate Aristolochia subglobosa, a new species assigned to subseries Anthocaulicae. The subseries is characterized by the presence of extremely short and cauliflorous racemes in which each flower is subtended by a small bract. The new species is related to A. bahiensis, A. daemoninoxia and A. guentheri. So far, A. subglobosa is the second species of this subseries known to occur in the Atlantic Forest of Brazil. © 2013 Magnolia Press. Source

This study evaluated the composition of anuran assemblages, and also the spatial and temporal distribution of those species in four permanent ponds. Two of these ponds are connected to Atlantic rainforest fragments by forest corridor and the other two are surrounded by Eucalyptus plantation and human settlement. Twenty-two species from five families were recorded from December 2003 to November 2004. Most species and individuals collected belong to Hylidae, which presented pronounced spatial overlap. Vegetation under 0.60 m was the most used calling site. Although not statistically supported, species richness and abundance were higher in rainy than dry months. Ponds with corridors had higher species richness and fourteen species were exclusively found on these ponds. The community structure of anurans in permanent ponds at this fragmented landscape is apparently dictated by the presence or absence of forest corridors connecting ponds to forest fragments. Source

Wendt T.,Federal University of Rio de Janeiro | da Cruz D.D.,Federal University of Paraiba | Demuner V.G.,Museu de Biologia Mello Leitao | Guilherme F.A.G.,Federal University of Goais | Boudet-Fernandes H.,Museu de Biologia Mello Leitao
Flora: Morphology, Distribution, Functional Ecology of Plants

Past taxonomic treatments have classified Euterpe espiritosantensis as a synonym of E. edulis. However, both continue to be identified as two distinct species and are enumerated in the threatened species list. The goal of this study was to compare the reproductive biology of sympatric populations of these two morphs so as to identify morphological characters and mechanisms of reproductive isolation that could help to clarify species boundaries. Individuals of E. edulis and E. espiritosantensis show differences in size and duration of the peduncular bract, and differ in regard to inflorescence and immature fruit coloration. With an overlapping flowering period, but with distinctly different flowering peaks, the two taxa share the main visitors, viz. different Apidae and some Vespidae. Fruit and viable seeds are produced after self-, cross- and inter-specific cross-pollination in both morphs. Seed germination is significantly higher in E. edulis than in E. espiritosantensis. Differences in morphological and reproductive features suggest that these sympatric populations of two Euterpe morphs are to a reasonable degree reproductively isolated, which supports the recognition of E. espiritosantensis as a distinct species from E. edulis. The potential for hybridization does not reject the hypothesis of species distinctness, but points to a potential case of sympatric speciation that merits further investigations. Given that natural populations of Euterpe are nowadays fragmented and reduced in area of occurrence, retaining the high conservation status for E. espiritosantensis will help to safeguard this taxonomic entity under considerable threat. © 2010 Elsevier GmbH. Source

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