Ptilometra
Ptilometra is a genus of feather stars in the family Antedonidae. Feather stars are a group of crinoids, which are echinoderms that are closely related to starfish, sea urchins, and sea cucumbers. They are characterized by their feathery arms, which are used for filter feeding. The genus Ptilometra is distinguished from other feather stars by its unique morphology and habitat preferences.
Common Names
Members of the genus Ptilometra are often referred to as "feather stars", a common name shared by many other crinoids. However, there are no specific common names for individual species within the genus.
Characteristics
Ptilometra feather stars are characterized by the following features:
- Feathery arms: They have numerous, branched arms that give them a feather-like appearance.
- Small size: Compared to other crinoids, Ptilometra species are typically smaller in size.
- Distinct cirri: Their cirri, which are small, finger-like appendages used for anchoring, are often long and slender.
- Varied coloration: The colors of Ptilometra feather stars can vary depending on the species and their environment. They may be white, yellow, orange, or brown.
Environments
Ptilometra feather stars are typically found in deep water environments, often attached to hard substrates like rocks or coral reefs. Some species are also known to inhabit soft sediment bottoms. They are found in various geographical locations, including the Atlantic Ocean, the Pacific Ocean, and the Indian Ocean.
References
For further information about the genus Ptilometra, you can consult the following resources: