Description of Campascus
provided by BioPedia
Test: broadly ovoid; cross-section ovoid or triangular; neck cylindroid, curved. The base is rounded or has up to three projections. Aperture round. The distinctive character is the hyaline collar. The composition of the shell is variable. Some species have circular, others amorphous, siliceous scales sometimes mixed with mineral particles, usually not regularly arranged. Nucleus ovular. Feeding: herbivore. Habitat: freshwater plants and sediments, one marine species. There are similarities with some genera of the family Psammonobiotidae. Due to the lack of information it is unclear if these similarities warrant a new classification. Type species: C. cornutus Leidy, 1879. Marine and freshwater species.