In addition, all of the historical papers since the first observation of the genus in 1855 are included. This disc will enable researchers around the world to have access to all of the information that is necessary to identify a population, to recognise an undescribed species, and to describe it adequately. The articles in foreign languages have been translated into English. Species descriptions - All descriptions including text, photographs, and drawings. Movies - Dissecting females from root tissue, picking egg masses, perineal patterns, etc.
Further information is available.