Rostrum

As rostrum (Latin for " trunk ", " snout ", " beak" ) tapered or beak -like extensions or projections are referred to in anatomy:

In vertebrates, the bony part of the nose
In archeology: projections on the skull on Breton carvings.
In birds the beak and the beak -like extension of the sternum, which corresponds to the manubrium of the human sternum
The snout -like extension of the mouth of the bony fish (eg sturgeon) and cartilaginous fish (sharks )
The rostrum parabasal at the skull base of the lower vertebrates, in reptiles to a narrow, dagger-like bone reduced ( parasphenoid, parabasal )
The shell extension of the Mundsaums ( sink ) and the Siphonalrinne
At various marine gastropods (especially Caenogastropoda ) of the head with the mouth, not to be confused with the proboscis (meaning also " trunk "), which is protruded from the mouth and foregut of
At the belemnites a fossil cone-shaped to cylindrical structure ( Orthorostrum, " thunderbolt " ) of calcite
In fossil shells of ammonites, the extension of the outer Mundsaumes
The ring of hooks (also: " rostellum ," diminutive of rostrum ) on the scolex ( front end) of the tapeworms
The rostral plate, the front plate of the ventral cephalic shield of trilobites, a fossil group of arthropods
In decapods an extension on the carapace ( carapace )
In insects mixed for an extension of the head, such as the extension of the mouth area eg beak flies, stable flies, Schnabelkerfen or weevils
In mites with zweigeteiltem carapace, the front part, see Prodorsum

Outside the anatomy is " Rostrum " for: