Kraussina rubra is a species of brachiopod, a type of marine invertebrate. It is commonly found in the Indo-Pacific region, particularly in the warmer waters of the Coral Triangle. Brachiopods are characterized by their two hinged shells, which are often symmetrical and resemble clams. Kraussina rubra has a distinctive bright red coloration, which gives it its common name.
Description & Characteristics
Kraussina rubra is a small brachiopod, typically reaching a maximum size of around 2-3 centimeters in length. Its shell is smooth and rounded, with a distinctive bright red color. This color is often described as a vibrant crimson or scarlet, making it easily distinguishable from other brachiopods. The shell is also known to be quite thin and delicate. Kraussina rubra has a characteristic hinge line, which runs across the top of the shell, and a beak, which is a pointed extension at the front of the shell. The beak is used for anchoring the brachiopod to the substrate.
Habitat and Occurrence
Kraussina rubra is a common inhabitant of shallow, tropical waters, predominantly found in the Indo-Pacific region. It is particularly abundant within the Coral Triangle, a biodiversity hotspot known for its extensive coral reefs. Kraussina rubra is often found attached to rocks, corals, and other hard substrates in the intertidal zone and subtidal zone. The presence of Kraussina rubra is a significant indicator of a healthy marine environment, as it thrives in areas with good water quality and abundant food sources.
Taxonomy
Kraussina rubra is classified within the phylum Brachiopoda, which is a diverse group of marine invertebrates. It belongs to the class Rhynchonellata, which is characterized by its distinctive hinge line and beak. Kraussina rubra is further classified within the order Terebratulida, a large order that encompasses many brachiopods. Finally, Kraussina rubra belongs to the family Kraussinidae, which is known for its bright red coloration and often smooth shell surface.
Feeding
Kraussina rubra is a filter feeder, meaning it obtains its food by filtering particles from the surrounding water. It uses its lophophore, a specialized feeding structure, to trap microscopic organisms like plankton and algae. These organisms are then transported towards the mouth by cilia, hair-like structures that line the lophophore. Kraussina rubra plays a crucial role in the marine ecosystem by filtering out organic matter, contributing to the overall health and balance of the environment.
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