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Clear-cut variation in the length of genital filaments amongst Bolivian specimens of Lutzomyia runoides, of the species group aragaoi, allowed us to recognise two different, non-overlapping populations living in sympatry. The additional observation of their mutually exclusive colonisation of isolated trees strongly suggested the existence of cryptic speciation. Multivariate, size-in and size-free...
This study is focused on the speciation of selected elements in oil ash. Our efforts weredirected primarily to obtain information on the various forms of vanadium, chromium and nickel.One sample was characterized via its total composition and via its capacity for releasing variouselements. The latter was estimated by hot water and nitric acid extractions. A rapid cold waterextraction technique has...
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