Belemnoidea (Noun)
Meaning
Order of extinct dibranchiate cephalopods related to the surviving spirulas.
Classification
Nouns denoting animals.
Examples
- Belemnoidea is an extinct order of cephalopods characterized by a long, conical shell and ten arms of roughly equal length.
- Fossil records show that the Belemnoidea thrived during the Jurassic period in what is now Europe and North America.
- The structure of Belemnoidea shells demonstrates a unique adaptation that may have offered protection from predators.
- Belemnoidea share many characteristics with modern-day spirula, a deep-dwelling cephalopod found in tropical and subtropical waters.
- Scientists have extensively studied Belemnoidea fossils to gain insight into the evolution of cephalopod bodies and their diverse adaptations.