Order Belemnoidea (Noun)
Meaning
Order of extinct dibranchiate cephalopods related to the surviving spirulas.
Classification
Nouns denoting animals.
Examples
- The fossil record of the order Belemnoidea dates back to the Early Jurassic and became extinct during the Early Cretaceous.
- Belemnoidea in former classification systems was considered an order of orthodox cephalopods, but now it is recognized as a distinct clade within the dibranchiate cephalopods.
- Belemnoidea was characterized by a distinctively shaped internal shell, often preserved as a fossil.
- The order Belemnoidea was closely related to the modern spirulid cephalopods, but the exact nature of their relationship is still a subject of research.
- Fossilized remains of Belemnoidea have been found in marine deposits around the world, providing valuable insights into the evolution of dibranchiate cephalopods.