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Jan KOTEJA, full professor at the University of Agriculture in Cracow, Poland, was involved in research on scale insects (Coccoidea), their morphology, biology, anatomy, faunistics, systematics, paleontology and plant protection.His scientific activities can be divided into three periods: registration of home species, their classification in a relevant order of scale insects taxonomy, and fascination...
Two diaspidid species of Quadraspidiotus MACGILLIVRAY occur on oaks in Poland: Q . zonatus (FRAUENFELD) and Q. ostreaeformis (CURTIS). Separation of these species is reliable only on the basis of the microscopic characters. The main difference between Q. ostreaeformis and Q. zonatus is the presence of the dorsal macroducts on 4th abdominal segment in Q. ostreaeformis and the absence of these ducts...
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