The Sanddollar – Sculpsitechinus auritus is a fascinating species of sea urchin found in the coastal waters of the Pacific Ocean. This unique marine creature, with its distinctive flattened, coin-like shape, plays an important role in the marine ecosystem.
Description & Characteristics
The Sculpsitechinus auritus, often referred to simply as the Sanddollar, is a flat, circular echinoderm that measures approximately 2-3 inches in diameter. Its upper surface, known as the aboral surface, is typically covered in a velvety texture, while the underside, or oral surface, features a mouth surrounded by five rows of tube feet. These tube feet help the Sanddollar move slowly across the ocean floor.
Habitat and Occurrence
The Sculpsitechinus auritus thrives in the intertidal zone and subtidal zone of the Pacific Ocean, from the depths of the northern coast of California down to the southern coast of Baja California. These regions are characterized by a diverse mix of marine life, including algae, seagrass, and various invertebrates. The Sanddollar, being a bottom-dwelling creature, is often found buried in the sand or under rocks, making it a prevalent presence in these aquatic ecosystems.
Taxonomy
The Sculpsitechinus auritus belongs to a group of marine invertebrates known as echinoderms, which includes starfish, sea urchins, and sea cucumbers. This species is classified within the Class: Echinoidea, which encompasses all sea urchins. The Sculpsitechinus auritus is further categorized within the Order: Echinolampadacea and the Family: Astriclypeidae, illustrating its close evolutionary relationships with other sand dollar species.
Feeding
The Sculpsitechinus auritus is a detritivore, primarily feeding on organic debris like decaying plant matter, algae, and small invertebrates. This food specialist plays an important role in the marine ecosystem by breaking down organic matter, returning nutrients to the environment and supporting other organisms.
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