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Within the cells of some members of basidiomycetes fungi are found microscopic structures called parenthesomes or septal pore caps. They are shaped like parentheses and found on either side of pores in the dolipore septum which separates cells within a hypha. Their function has not been established, and their composition has not been fully elucidated. The variations in their appearance are useful in distinguishing individual species. Generally, they are barrel shaped, with an endoplasmic reticulum covering.

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  • Müller WH, Montijn RC, Humbel BM, van Aelst AC, Boon EJ, van der Krift TP, Boekhout T (July 1998). "Structural differences between two types of basidiomycete septal pore caps". Microbiology. 144 (Pt 7): 1721–30. doi:10.1099/00221287-144-7-1721. PMID 9695906.
  • Moore RT (1996). "V. The Dolipore/Parenthesome Septum in Modern Taxonomy". In Sneh B, Jabaji-Hare S, Neate SM, Dijst G (eds.). Rhizoctonia Species: Taxonomy, Molecular Biology, Ecology, Pathology and Disease Control. Springer. pp. 16–18. doi:10.1007/978-94-017-2901-7_2. ISBN 978-0-7923-3644-0.