Communities are complex and dynamic systems that change with time. The first attempts to explain how they were structured involve contemporary phenomena like ecological interactions between species (e.g., competition and ...

Amauroderma trichodermatum is reported from Bolivia, the collection being the fourth one known worldwide. The species is unique in the genus by having a hirsute pileus and a monomitic hyphal system. The use of the epithet ...

The soldierless Neotropical Apicotermitinae is considered among the less known termite groups and its ecological relevance warrants studies about the biology y diversity of their species. We investigated the presence, ...

Fueron estudiados y descriptos los granos de polen de Bordasia bicornis Krapov. conmicrocopio óptico y microscopio electrónico de barrido. Éstos presentaron afinidad polínicacon especies del género Sida L, por lo que se ...

El grupo de entidades afines a Vernonia rubricaulis Humb. & Bonpl. ha sido tratado alternativamente como una sola especie muy variable o como diferentes entidades por distintos autores. En el presente trabajo se describen ...

Mecardonia reneeae, a new species from northeastern Argentina, is described and illustrated. This taxon has certain resem- blance to M. procumbens var. flagellaris, but can be easily distinguished by the combination of ...

The input of leaf litter from riparian vegetation could be affected by changes in precipitation and modifications to the hydrological regime. We analyse the pattern of leaf litterfall at the community scale as well as the ...

The contributions concerning possible cases of sexual dimorphisms in fossil and living sloths are scarce. Until now, studies in fossil ground sloth sexual dimorphism have been limited to the subfamilies Megatheriinae ...

The pollen morphology of eight species of Stemodia L. (Plantaginaceae) was analysed with the aim of refining the taxonomy of this genus. The pollen grains were examined with both light and scanning electron microscopes. ...

The potential colonization by anchored plants (PCAP) and the potential areas for initial coloniza- tion of free floating plants were estimated during the early filling phase for the Yaciretá reservoir. In order to ...