Ophiurida
Ophiurida (brittle-stars; class Stelleroidea, subclass Ophiuroidea) An order of brittle-stars in which the ambulacral groove is covered by the lateral arm-plates. The dorsal and ventral arm-plates are well developed. Large radial shields, buccal shields, and genital plates are present in the disc. The order is known from the Silurian to the present.
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Feather Stars , Feather stars, or comatulids, are echinoderms that belong to the class Crinoidea (phylum Echinodermata), which they share with the sea lilies. Unlike… Brittlestar , brittle-stars See EURYHALINA; OPHIOMYXINA; OPHIURIDA; OPHIURIDEA; PHRYNOPHIURIDA.
brit·tle·star / ˈbritlˌstär/ • n. an echinoderm (Ophiura and other… Arm , arm1 / ärm/ • n. 1. each of the two upper limbs of the human body from the shoulder to the hand. ∎ (in technical use) each of these upper limbs from… musculo-skeletal system , arms serve as our primary connection to people and objects, through our reach and our ability to grasp things: through defensive postures, arms can a… Star Anise , Star anise Articulata , Articulata
1. (phylum Brachiopoda) A class of brachiopods in which the calcareous valves are impunctate, punctate, or pseudo-punctate. The fibrous or…
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Ophiurida