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.

References

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.

v t e Structures of the cell / organelles
Endomembrane system	Cell membrane Nucleus Endoplasmic reticulum Golgi apparatus Parenthesome Autophagosome Vesicle Exosome Lysosome Endosome Phagosome Vacuole Acrosome Cytoplasmic granule Melanosome Microbody Glyoxysome Peroxisome Weibel–Palade body
Cytoskeleton	Microfilament Intermediate filament Microtubule Prokaryotic cytoskeleton Microtubule organizing center Centrosome Centriole Basal body Spindle pole body Myofibril Undulipodium Cilium Flagellum Axoneme Radial spoke Pseudopodium Lamellipodium Filopodium
Endosymbionts	Mitochondrion Plastid Chloroplast Chromoplast Gerontoplast Leucoplast Amyloplast Elaioplast Proteinoplast Tannosome
Other internal	Nucleolus RNA Ribosome Spliceosome Vault Cytoplasm Cytosol Inclusions Proteasome Magnetosome
External	Cell wall Extracellular matrix

See also

References