: cannulae) is the term to describe hollow structures which resemble tubes that are only found in certain archaea cells.
[1] Specifically identifying family members of the Pyrodictium genus, many examples have been examined from hydrothermal marine locations which harbor temperatures of 80-110 degrees Celsius.
It has been hypothesized that this network connection might be used to exchange genetic material or nutrients, which could contribute to the cells ability to survive unfavorable conditions.
When observed in close proximity, cannula appear hollow with a diameter of 25 nm that can grow up to 40 mm long.
This has been proven by observing no morphological changes when subjected to high temperatures and sodium dodecyl sulfate.