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Historical overview of classification and phylogeny of the Proboscidea
Abstract Extant elephants were first named Proboscidea by Illiger in 1811. At that time, they were known as ‘pachyderms’. According to Cuvier’s Le regne animal (1817), the pachyderms also included tapirs, pigs, hippos, and hyra:xes....
The Biology of Xenopus
Abstract Xenopus, the African clawed frog, is one of the three most widely cited vertebrate animals in the biological literature, yet almost all knowledge is based on laboratory experience of a single species, Xenopus laevis...
The Proboscidea
Abstract The Proboscidea, of which only two species of elephant survive today, were one of the great mammalian orders of the Cenozoic. Their success over evolutionary time is reflected by their morphological and taxonomic diversity,...
Organic Pollutants in the Environment
Abstract Contamination of soils and sediments with organic chemicals and the potential movement of these chemicals to ground water are of increasing public concern. Because of their large surface area and charge, clays comprise the...