The lagena is part of the vestibular system in fish and amphibians.

Erythrosuchus has a short lagena, which is also expected in the last common ancestor of all archosaurs.

His last paper described the presence of the lagena in the platypus, which is also found in birds.

Neither is the channel for the perilymphatic duct, which is a tube that leaves the lagena.

The orientation of the lagena of C. saharicus resembles the condition in crocodillians and some birds.

The endolymphatic duct is wrapped in a simple loop around the lagena, with the basilar membrane lying along one side.

Complete surgical removal of the entire cochlea, lagena, and calumellae completely abolishes any response to infrasound.

Dagab, Lagena, Osram and Åhlens also have distribution warehouses in the industrial area.

Running parallel with the perilymphatic duct is a separate blind-ending duct, the lagena, filled with endolymph.

In fish, the lagena is implied in hearing and the registration of vertical linear acceleration, in amphibians in the latter only.

Furthermore, the hadrosaurid lagena is elongate like a crocodilian's, indicating that the auditory portion of the inner ear was well-developed.

In most reptiles the perilymphatic duct and lagena are relatively short, and the sensory cells are confined to a small basilar papilla lying between them.

Although many fish are capable of hearing, the lagena is, at best, a short diverticulum of the saccule, and appears to have no role in sensation of sound.

Acanthodians share with Actinopterygii the characteristic of three otoliths, the sagitta in the sacculus, the asteriscus in the lagena, and the lapillus in the utriculus.

The lagena is separated from the perilymphatic duct by a basilar membrane, and contains the sensory hair cells that finally translate the vibrations in the fluid into nerve signals.

Fissurina is a unilocular (single chambered) calcareous foram genus, similar in general form to Lagena, but included in the nodosariacean family Ellipsolagenidae, Lagenida.

The lagena is the portion of the inner ear responsible for hearing, and is known as the cochlea in mammals (although in mammals it is coiled rather than straight).

As a result of this increase in length, the basilar membrane and papilla are both extended, with the latter developing into the organ of Corti, while the lagena is now called the cochlear duct.

There is at least one example, in the related Corythosaurus, of a slender stapes (reptilian ear bone) in place, which combined with a large space for an eardrum implies a sensitive middle ear, and the hadrosaurid lagena is elongate like a crocodilian's.

In human anatomy of the ear, the extremities of the ductus cochlearis are closed; the upper is termed the lagena and is attached to the cupula at the upper part of the helicotrema; the lower is lodged in the recessus cochlearis of the vestibule.