Infrabasals, also known as infrabasal plates, refer to the specialized structures found in certain organisms, particularly in marine invertebrates like echinoderms. Infrabasals are a crucial component of the skeletal system in these organisms and play an essential role in their growth, support, and locomotion.
Infrabasals are located at the base of the main body structure, which can be a central disc or a long stem, depending on the species. They serve as attachment points for various skeletal elements, such as arms, spines, or brachioles, extending outward from the main body.
These structures are typically rigid and often composed of calcium carbonate or other durable materials. They provide stability and support to the organism, allowing it to maintain its shape and withstand external forces.
The shape and arrangement of infrabasals can vary significantly between different species, reflecting their specific evolutionary adaptations. They can be circular, pentagonal, or even more complex in shape, depending on the particular organism.
In summary, infrabasals are specialized skeletal structures found in marine invertebrates, primarily echinoderms. They are positioned at the base of the main body structure and serve as attachment points for various skeletal elements. Infrabasals provide support, stability, and contribute to the locomotive abilities of these organisms.
