micraster in a sentence
n.
📚 Grade Level: Grade 11, Grade 12
Definition
Micraster is a genus of extinct echinoids (sea urchins) known from fossil records, particularly from the Cretaceous period, which are used to study ancient marine environments.
Sample Sentences
- Micraster fossils can provide valuable insights into the ancient marine environments of the Cretaceous period.
- The paleontologist was excited to discover a well-preserved Micraster specimen during the excavation.
- Micraster species are commonly found in chalk deposits, showcasing their prevalence in historic oceans.
- Researchers often study Micraster to understand the evolutionary adaptations of echinoids.
- The distinctive shape of the Micraster shell makes it a fascinating subject for both amateur and professional collectors.