Membrane systems in endocytobiosis iii. Ultrastructural features of symbionts and vacuolar membrane in bactériocytes of the wood-eating cockroach cryptocercus punctulatus (dictyoptera, cryptocercidae)

Elisa Bigliardi, Maria Gloria Selmi, Silvia Corona, Claudio A. Bandi, Luciano Sacchi

Research output: Contribution to journalArticle


This paper reports the first ultrastructural investigation of bactériocytes of a member of the genus Cryptocercus. The study of thin sections and freeze-fracture replicas revealed that the symbionts are sequestered intracellularly within a vacuolar system. Aggregates of intra-membrane particles on the E-fracture face, close sites of adhesion, and a process of vésiculation have been evidenced on the vacuolar membrane. Moreover, a blebbing process of the symbiont outer membrane is described and the results are compared to those obtained from previously examined cockroaches.

Original languageEnglish
Pages (from-to)235-238
Number of pages4
JournalBolletino di zoologia
Issue number3
Publication statusPublished - 1995



  • Bactériocytes
  • Freeze-fracture
  • Symbionts
  • Vacuolar membrane

ASJC Scopus subject areas

  • Animal Science and Zoology

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