Definitions

Cavity filled with fluid and particles acting as organ of orientation. [Poore, 2004]
Diminutive organ providing sense of balance. [McLaughlin, 1980]
Organ of balance at base of antennular peduncle in brachyurans. [Ingle, 1992]
Sensory organ of awareness of rotation and position located at base of first antenna. [Perez Farfante and Kensley, 1997]
(Taxon-specific: Order Decapoda) Organ of equilibrium, one located in first segment of peduncle of each antennule. Innervated by branch of antennular nerve coming from brain and may contain statolith supported by sensory hairs. (open, closed; with/without statolith). [Stachowitsch, 1992]
(Taxon-specific: Order Amphipoda) One of two small organs of equilibrium located dorsally in head; each statocyst contains one to five statoliths. [Stachowitsch, 1992]
(Taxon-specific: Order Isopoda) Organ of equilibrium located in telson of certain isopods; contains statolith. [Stachowitsch, 1992]
(Taxon-specific: Order Isopoda) Small saclike sensory organ, often containing granules, used to indicate to the animal its orientation. [Kensley and Schotte, 1989]
(Taxon-specific: Order Mysida) Organ of equilibrium, one located at base of inner branch (endopod) or each uropod. Contains statolith and is innervated by last abdominal ganglion. [Stachowitsch, 1992]
(Taxon-specific: Superorder Syncarida) In anaspidacean and stygocaridacean, organ of equilibrium located in first segment of each antennule. [Stachowitsch, 1992]