; adj. cameral or camaral)
One of the chambers within a chambered mollusc, e.g. a nautiloid (Nautiloidea) or ammonoid (Ammonoidea). In living cephalopods (Cephalopoda), e.g. Nautilus, the chambers contain gas at pressures ranging from about 0.3 to 1 atm (30–100 kPa). Some of the chambers may contain ‘cameral fluid’ which can be extracted by the siphuncle, allowing the animal to adjust its density according to the depth at which it is living.
Subjects: Earth Sciences and Geography.