phragmacone

A noun referring to the thin, conical, chambered internal shell of a belemnite, which may be either straight or curved.

• 🇵🇹Substantivo que designa a concha interna fina e cônica, dividida em câmaras, dos belemnites, podendo ser reta ou curvada.

1. Internal shell of a belemnite C2 formal scientific

   The thin, conical, chambered internal shell (either straight or curved) of a belemnite, an extinct cephalopod.

   • The fossilized phragmacone was carefully extracted from the limestone.
   • Paleontologists studied the chambers of the phragmacone to understand the belemnite's buoyancy.
   • The curved phragmacone of this specimen suggests a distinct species.

   🇵🇹Concha interna do belemnita