Echinocystitoida

Echinocystitoida is a taxonomic order within the class Echinoidea, which includes sea urchins and sand dollars. This order is characterized by its members' unique skeletal structures and life habits.

Taxonomy

The order Echinocystitoida belongs to the class Echinoidea, which is part of the phylum Echinodermata. Echinodermata also includes other marine animals such as starfish and sea cucumbers. The Echinocystitoida order is further divided into several families, including Echinocystitidae and Hemicidaridae.

Morphology

Members of the Echinocystitoida order possess a unique skeletal structure known as a test. This structure, made up of calcareous plates, provides protection and support for the animal. The test is typically covered in spines, which can be used for locomotion and defense.

Habitat and Distribution

Echinocystitoida species are found in a variety of marine environments, from shallow coastal waters to deep-sea habitats. They are distributed globally, with species found in every ocean.

Life Habits

Echinocystitoida species are typically benthic, meaning they live on the ocean floor. They are omnivorous, feeding on a variety of food sources including algae, detritus, and small invertebrates.

Conservation

While some species within the Echinocystitoida order are common and widespread, others are considered rare or endangered. Threats to these species include habitat loss, pollution, and climate change.

File:Echinocystitoida.jpg

A member of the Echinocystitoida order.

See Also

• Echinoidea
• Echinodermata
• Marine biology

References

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