Sea daisies (infraclass Concentricycloidea; orderPeripodida) make up an unusual group of deep-sea taxa belonging to the phylum Echinodermata, with three species described in the genus Xyloplax. Intestine and anus are absent.
Sea daisies have been discovered in three localities, including deep-sea habitats off New Zealand, the Bahamas and most recently from the northern central Pacific. They have been collected primarily from sunken, deep-sea (1000+ meters) wood. Although known from only a handful of specimens initially, many specimens have now been collected from the Bahamas.
Classificationedit
Since they were discovered in 1986, their position within the echinoderms has been debated. At first they were placed in a new class, Concentricycloidea, since it was unclear whether they might have affinities with asteroids or ophiuroids. The former view gained acceptance, and since 2006, they are currently considered a sister group to the Infraclass Neoasteroidea, which represents all post-Paleozoic asteroids within the Class Asteroidea.
Class Asteroidea, Infraclass Concentricycloidea, Order Peripoda (or Peripodida), Family Xyloplacidae
Nature "A new class of Echinodermata from New Zealand"
April 10, 2024
daisy, plant, melanthera, biflora, daisies, infraclass, concentricycloidea, order, peripodida, make, unusual, group, deep, taxa, belonging, phylum, echinodermata, with, three, species, described, genus, xyloplax, intestine, anus, absent, daisiesxyloplax, janet. For the plant see Melanthera biflora Sea daisies infraclass Concentricycloidea order Peripodida make up an unusual group of deep sea taxa belonging to the phylum Echinodermata with three species described in the genus Xyloplax Intestine and anus are absent Sea daisiesXyloplax janetaeScientific classificationDomain EukaryotaKingdom AnimaliaPhylum EchinodermataClass AsteroideaInfraclass ConcentricycloideaBaker Rowe amp Clark 1986Order PeripodidaBaker Rowe amp Clark 1986Family XyloplacidaeBaker Rowe amp Clark 1986Genus XyloplaxBaker Rowe amp Clark 1986SpeciesXyloplax janetaeXyloplax medusiformisXyloplax turneraeDistribution editSea daisies have been discovered in three localities including deep sea habitats off New Zealand the Bahamas and most recently from the northern central Pacific They have been collected primarily from sunken deep sea 1000 meters wood Although known from only a handful of specimens initially many specimens have now been collected from the Bahamas Classification editSince they were discovered in 1986 their position within the echinoderms has been debated At first they were placed in a new class Concentricycloidea since it was unclear whether they might have affinities with asteroids or ophiuroids The former view gained acceptance and since 2006 they are currently considered a sister group to the Infraclass Neoasteroidea which represents all post Paleozoic asteroids within the Class Asteroidea Class Asteroidea Infraclass Concentricycloidea Order Peripoda or Peripodida Family Xyloplacidae Genus Xyloplax Xyloplax janetae Xyloplax medusiformis Xyloplax turneraeReferences edit nbsp Wikispecies has information related to Peripoda Introduction to Xyloplax Controversies in Xyloplax Classification Classification of the Extant Echinodermata Nature A new class of Echinodermata from New Zealand Retrieved from https en wikipedia org w index php title Sea daisy amp oldid 1190059112, wikipedia, wiki, book, books, library,
