Odontophore

Diagrammatic transverse view of the buccal cavity of a gastropod, indicating the odontophore (o).
The rest of the body of the snail is shown in green. The food is shown in blue. Muscles that control the radula are shown in brown. The surface of the radula ribbon, with numerous teeth, is shown as a zig-zag line

The odontophore is part of the feeding mechanism in molluscs. It is the cartilage which underlies and supports the radula, a ribbon of teeth.^[1] The radula is found in every class of molluscs except for the bivalves.

The feeding apparatus can be extended from the mouth of the animal, and the radular ribbon can slide over the odontophore. By moving the radula and odontophore over a surface, the teeth cut and scoop up food particles and convey them into the mouth, from whence they enter the oesophagus.

The diagrams here show the feeding apparatus of a gastropod. Note however that this is a generalized diagram, the details of which do not necessarily apply to predatory species of gastropods such as the cone snails, which have a highly specialized feeding mechanism.

References

v t e Cephalopod anatomy Shell Shell types External shells: Ammonoid shell Argonautid eggcase Nautiloid shell Orthocone Internal shells: Belemnoid guard Cirrate shell Cuttlebone Gladius (pen) Spirula shell Stylet External features Aperture Apex Callus Lirae Periostracum Sculpture Spire Sutures Umbilicus Internal features Body chamber Camerae Nacre Phragmocone Septa Siphuncle Whorls Mantle External anatomy Dermal structures Fins (wings) Flotation devices ("secondary fins") Mantle locking-apparatus Tail Internal anatomy Branchial hearts Ctenidia (gills) Hepatopancreas (digestive gland) Ink sac and ink Needham's sac Nephridia ("kidneys") Nidamental glands Osphradium Pericardial glands Funnel Foveola Funnel groove Funnel locking-apparatus Funnel organ Funnel retractor muscles Funnel valve Head and limbs Brachial crown Arms Hectocotylus Tentacles Carpus Dactylus Manus Suckers and hooks Buccal region Aptychus Beak Odontophore Radula Occipital region Occipital crest Occipital folds (nuchal folds) Occipital membrane Olfactory organ Nuchal organ Other parts Eyes Cornea Eye pore Eyelid sinus Secondary eyelid Statocysts General Chromatophores Photophores Nervous system Squid giant axon Squid giant synapse Developmental stages: Spawn → Paralarva (Doratopsis stage) → Juvenile → Subadult → Adult • Protoconch (embryonic shell)