Calycina is a superorder of echinoderms. There are 196 species of Calycina, in 45 genera and 10 families. Dead Calycina formshallow marine sediments. They are omnivores.
Definition: Marine sediment that accumulates within shallow regions of the oceanic basin close to continents, such as the continental shelf, or continental slope
Definition: position of an organism in a food web. May be described verbally with descriptors including primary producer, herbivore or carnivore. If described numerically, 1 indicates a primary producer, 2 a herbivore, and so on up the food web.
