Tatra Mountains (Poland) (Collembola: Hypogastruridae)

ABSTRACT. Polymorphism was detected in Ceratophysella armata (NICOLET, 1841) from the Tatra Mountains (Polish Carpathians). In the subalpine zone C. armata exists as two chaetotactic forms. The form with normal chaetotaxy seems to be more common, whereas the form with spine-like setae occurs only occasionally. Probably fast and significant decrease in temperature and increase in humidity during the reproductive period may affect the appearance of this last form