A new species of Ceroxylon from Peru, C. peruvianum, is described and illustrated. The finding of disjunctive populations of C. quindiuense in Peru is discussed.

A new species of Ceroxylon from Peru, C. peruvianum, is described and illustrated. The finding of disjunctive populations of C. quindiuense in Peru is discussed.

The objective of the work was to demonstrate the inhibitory activity of in vitro plants of Drosera capillaris (Droseraceae) on Mycobacterium tuberculosis. The plants of D. capillaris were propagated in in vitro cultures from plantlets and mature leaves. It was used metanolic extract and gas chromatography to determinate secondary metabolites. Lowenstein-Jensen media, supplemented with 1.25; 2.5 y 5 mg/mL concentrations of cloroformic fraction obtain from metanolic crude extract, was used in the growth evaluation of five M. tuberculosis strains. The results indicated that plantlets of 3 – 5 cm up to, were obtained 10 – 12 months after in vitro culture. The naphtoquinone plumbagin was determinated by comparison with currently pattern retention, like as another hidrocarbonic compounds seem to long chain. M. tuberculosis growth was inhibited in 40 – 93.1% range, 2.5 and 5 mg/mL treatme...

En el presente trabajo se estudian cinco especies del género Plukenetia de la Amazonía peruana: P. brachybotrya, P. loretensis, P. polyadenia, P. huayllabambana, P. volubilis (procedencia San Martín); y de un supuesto morfotipo (P. volubilis, procedencia Cusco). Los 126 especímenes estudiados fueron identificados mediante claves de caracteres morfológicos (formas de hojas, tallos y semilla; posición de glándulas basilaminares) y posteriormente mediante marcadores moleculares ISSR (CAA, CAG, GACA). Los análisis morfológicos permitieron separar las cinco especies descritas: P. brachybotrya, P. loretensis, P. polyadenia, P. volubilis y P. huayllabambana. Los dos supuestos morfotipos de P. volubilis fueron discriminados por la posición de las glándulas, tamaño de semillas y forma del tallo. Los resultados proporcionados por el Análisis Factorial de Correspondencia (AFC) y corrob...

In this work we performed a biogeographic study of two genera of Amazonian land snails, Megalobulimus (Strophocheilidae) and Systrophia (Scolodontidae). We used samples from different regions of the Peruvian Amazon, as well as bibliographic information. We analyzed both nuclear (5.8S-ITS2-28S rRNA) and mitochondrial (16S rRNA) genes to reconstruct phylogenies and obtain hypotheses concerning the evolutionary relationships among Amazonian genera and other species with global distribution. The nuclear phylogeny allowed us to determine the evolutionary position of both genera, and the mitochondrial phylogeny permitted the differentiation of species at the intrageneric level. We found that Megalobulimus clustered with the non-achatinoid clade within Stylommatophora, as expected, but its relationship to family Acavidae could not be demonstrated. Systrophia did not cluster with any of the two ...

In this work we performed a biogeographic study of two genera of Amazonian land snails, Megalobulimus (Strophocheilidae) and Systrophia (Scolodontidae). We used samples from different regions of the Peruvian Amazon, as well as bibliographic information. We analyzed both nuclear (5.8S-ITS2-28S rRNA) and mitochondrial (16S rRNA) genes to reconstruct phylogenies and obtain hypotheses concerning the evolutionary relationships among Amazonian genera and other species with global distribution. The nuclear phylogeny allowed us to determine the evolutionary position of both genera, and the mitochondrial phylogeny permitted the differentiation of species at the intrageneric level. We found that Megalobulimus clustered with the non-achatinoid clade within Stylommatophora, as expected, but its relationship to family Acavidae could not be demonstrated. Systrophia did not cluster with any of the two ...

Phytelephas macrocarpa is a dioecious palm that lacks studies on the entomofauna that visit its flowers in western Amazonia. In this study we identified the insect visitors and their interaction with the inflorescences of P. macrocarpa in two localities in northwestern Peruvian Amazonia. Additionally, the richness and abundance of these insects was determined. For this purpose, six inflorescences were collected per locality (three male and three female). During field trips, the interactions of the insects on the inflorescences were observed. A total of 28 106 insects distributed in 27 species were recorded, where Amazoncharis sp., Aleochara sp. and Anchylorhynchus

Phytelephas macrocarpa es una palmera de relevancia ecológica y económica, especialmente por la exportación de su semilla para artesanías. Sin embargo, enfrenta amenazas por la sobreexplotación y la degradación de hábitat, afectando su sostenibilidad y el sustento de las comunidades locales. Este estudio evaluó su densidad, estructura poblacional y regeneración en el noroeste de la Amazonía peruana, describiendo además su ambiente donde crece. Se establecieron diez parcelas de 1000 m², registrándose 3824 individuos en cuatro categorías: plántulas (2134), juveniles (436), subadultos (252) y adultos (1002). Las plántulas tuvieron una mayor densidad (2134 ind.10 000m⁻²), destacando a la localidad de Ahuashillo con el índice de regeneración más alto (4.200). La especie prospera en bosques secos, premontanos y húmedos, hasta los 663 m de altitud, y la mitad de sus pobla...

This article presents an inventory of South American palms including 457 species and 50 genera. The distribution of palms within seven phytogeographical entities is analyzed. Factors which influence the evolution of palms in South America are discussed.

This article presents an inventory of South American palms including 457 species and 50 genera. The distribution of palms within seven phytogeographical entities is analyzed. Factors which influence the evolution of palms in South America are discussed.