Ultrastructural Studies on the Development of the Gregarine Enterocystis Racovitzai in the Gut of Baetis Rhodani (Ephemeroptera, Baetidae)

  • Elda Gaino
  • Manuela Rebora


Different developmental phases have been observed in the gregarine Enterocystis racovitzai living in Baetis rhodani (Insecta: Ephemeroptera): the young gregarine in the midgut cell epithelium; the syzygy in the midgut lumen and the cyst in the terminal portion of the midgut. Gregarines in mature syzygy exhibit characters useful for their identification. Even though the growing phases are difficult to identify, we have tentatively assigned to this species the observed single gamonts and individuals in pairs. Among the ultrastructural features, epicyte modifications and the presence of gametes in formation are described. A synopsis on the occurrence of various species of Enterocystis gregarines associated with Ephemeroptera is also reported.


Midgut Cell Septate Junction Midgut Cell Epithelium Midgut Lumen Specific Attribution 
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Copyright information

© Springer Science+Business Media New York 2001

Authors and Affiliations

  • Elda Gaino
    • 1
  • Manuela Rebora
    • 1
  1. 1.Dipartimento di Biologia Animale ed EcologiaPerugiaItaly

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