description Rotula deciesdigitatus Overview
Rotula deciesdigitatus is a distinctive species of irregular sea urchin belonging to the Clypeasteroida order, commonly known as sand dollars. It is recognized by its flattened, star-shaped test and the unique digitate, or finger-like, structure of its ambulacral petals. This marine invertebrate is native to the eastern Atlantic Ocean, particularly inhabiting the coastal waters off West Africa. Like other irregular urchins, it lives partially buried in sandy sea floor environments, where it feeds on detritus and microorganisms.
help Rotula deciesdigitatus FAQ
What makes Rotula deciesdigitatus unique compared to other sea urchins?
Rotula deciesdigitatus is a distinctive, irregular sea urchin recognized by its flattened, star-shaped body. Its most defining trait is the unique, digitate (finger-like) structure of its ambulacral petals. This unique morphology helps differentiate it from the more common, rounded sea urchin species.
Where does Rotula deciesdigitatus live in the ocean?
As an irregular species of sea urchin, it is specially adapted to live buried inside sandy or muddy marine substrates. It prefers shallow, subtidal environments rather than clinging to rocky crevices. Burrowing into the sand helps protect it from predators and strong ocean currents.
What does the name Rotula deciesdigitatus actually mean?
The species name deciesdigitatus directly translates to having ten fingers, referencing its finger-like extensions. These extensions form the ambulacral petals on its test (shell). The genus name Rotula refers to its somewhat wheel-like, radial shape.
How does Rotula deciesdigitatus feed while buried in the sand?
Like many infaunal urchins, it is a deposit feeder that ingests the surrounding sand to extract organic nutrients. It uses specialized, modified tube feet and its jaw structure to sift through the sediment. This feeding process leaves distinct, star-shaped traces on the sea floor.
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