Spire (mollusc)
Videos
A spire is a part of the coiled shell of molluscs. The spire consists of all of the whorls except for the body whorl. Each spire whorl represents a rotation of 360°. A spire is part of the shell of a
Very high-spired shells of the sea snail species Turritella communis
Medium-spired shell (live individual) of a European land snail, probably Trochulus hispidus
Very low-spired shells of the land snail species Xerolenta obvia
The sinistral shell of the freshwater snail Planorbarius corneus, a view of the sunken spire, which is held facing downwards in life
Body whorl
Videos
The body whorl is part of the morphology of the shell in those gastropod mollusks that possess a coiled shell. The term is also sometimes used in a similar way to describe the shell of a cephalopod mo
Spire (mollusc)
…A spire is a part of the coiled shell of molluscs. The spire consists of all of the whorls except for the body whorl. Each spire whorl represents a rotation of 360°. A spire is part of the shell of a snail, a gastropod mollusc, a gastropod shell, and also the whorls…
View of the spire side of the planispiral shell of the freshwater snail Anisus septemgyratus. The body whorl is the outermost complete revolution of the shell spiral