Analcidometra
Analcidometra is a genus of feather stars, also known as crinoids, belonging to the family Antedonidae. These marine invertebrates are found in various regions of the world, including the Atlantic Ocean, the Pacific Ocean, and the Indian Ocean. The genus is characterized by its unique morphology and specific characteristics, which distinguish it from other crinoids.
Characteristics
Members of the Analcidometra genus are typically small to medium-sized crinoids, with a distinctive appearance. Their bodies are composed of a central disc, known as the calyx, from which arms extend outwards. The arms are usually branched, giving them a feather-like appearance. Analcidometra species often have distinctive pinnules, which are small, finger-like projections along the arms. One key identifying characteristic is the presence of cirri, which are small, claw-like appendages that help the crinoid to grip onto surfaces. The cirri are often arranged in rows along the arms, further enhancing the feather-like appearance of the crinoid.
Environment
Analcidometra species are typically found in shallow water environments, particularly on coral reefs and rocky substrates. They are often found in areas with strong currents, where they use their arms to filter food from the water column. Crinoids are suspension feeders, meaning they obtain food by filtering small organisms and particles out of the water using their feathery arms.
Common Names
While not widely known by common names, some Analcidometra species are referred to as "feather stars" or "sea lilies" due to their distinctive appearance.
References
For more information, see the following resources: