Laboratory hybridization studies were performed on the springtail species Bonetogastrura cavicola (Börner, 1901) and Ceratophysella impedita (Skarżyński, 2002). The studies revealed that the species under consideration can not produce viable offspring, but they can produce numerous eggs and some hybrid embryo. Consequently both species were recognized as closely related and members of the genus Ceratophysella Börner, 1932.
Grazing preferences of collembolans Ceratophysellasp. 1 were noted. The collembolans feed on the sporangia of Pseudoperonospora cubensisgrowing on plants Cucumis sativusin greenhouses in Esfahan province in Iran. Sporangia of Pseudoperonospora cubensiswere the preferred food of all fungal species noted in the alimental tract of the springtails. All digestive tracts of the springtails contained sporangia of P. cubensis.
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