Barbatia complanata is a species of marine bivalve mollusk belonging to the family Arcidae. This species, commonly known as the “flattened ark”, is distinguished by its characteristic flattened, elongated shell. It is an important component of marine ecosystems, playing a crucial role in the food chain and contributing to the biodiversity of coastal habitats.
Description & Characteristics
Barbatia complanata has a distinctive flattened, elongated shell with a distinct, prominent umbo. The shell, typically light brown in color, can reach a maximum size of approximately 50 millimeters. Its surface exhibits radial ridges that are frequently crossed by finer concentric lines, lending a textured appearance to the shell.
Habitat and Occurrence
Barbatia complanata is typically found in shallow water environments, ranging from the intertidal zone to depths of around 50 meters. This species prefers habitats characterized by hard substrates, often attaching to rocks, reefs, and other solid surfaces. Barbatia complanata is commonly encountered in the subtidal zone, a marine region located below the low tide mark, and in the infralittoral zone, an area extending from the low tide mark to the edge of the continental shelf. This widespread occurrence makes it a prevalent presence in these aquatic ecosystems.
Taxonomy
Barbatia complanata is classified within the phylum Mollusca, specifically belonging to the Class: Bivalvia, Order: Arcida, and Family: Arcidae. This taxonomic placement reflects the species’ evolutionary relationship to other bivalve mollusks, particularly those within the Arcidae family, known for their distinctive, often thick, shells.
Feeding
Like many bivalves, Barbatia complanata is a filter feeder, relying on microscopic organisms suspended in the water for sustenance. Its feeding mechanism involves siphoning water into its mantle cavity, where specialized gills trap food particles. The captured food is then transported to the mouth for digestion, contributing to the species’ role in the marine food web.
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