one could only compare professor feider’s work with that of aristide caradgea, who studied micro-lepidoptera, attracting all the world researchers of that group to come in a pilgrimage to his modest place in grumazesti, neamț, romania. similarly, feider’s strenuous line of work encompassed acari collections from all over europe, st. helen island, north korea, nepal, mongolia, india, vietnam, brazil, venezuela, and chile, making his lab in the alexandru ioan cuza university (romanian: universitatea „alexandru ioan cuza”; acronym: uaic), of iași, romania, a mecca of the world’s acarologists.