A class may be a "subclass" of another, inheriting characteristics from its parent "superclass". This subclass is itself indented under subclass 570, Vibration. A common subclass of classification is probabilistic classification. Implementation inheritance is the mechanism whereby a subclass re-uses code in a base class. There are methods that a subclass cannot override. Example of a base class that is open to deriving a new subclass from it. Mites are small arthropods belonging to the class Arachnida and the subclass Acari. Only the method needs to be implemented (specialized) by each derived subclass. Monotremes are traditionally referred to as the mammalian subclass Prototheria. This inevitably comes with a decrease in accuracy for representing any particular subclass of molecules. The "Omaha" class was designed specifically in response to the British subclass of the . Lungfish are freshwater rhipidistian fish belonging to the subclass Dipnoi. A common conceptual error is to mistake a "part of" relation with a subclass. In subsequent taxonomies, these are sometimes regarded as orders within the subclass Ammonoidea. The prominent hydrolase subclass used in dephosphorylation is phosphatase.