词条 | Sea daisy |
释义 |
| name = Sea daisies | image = Xyloplax janetae.jpg | image_caption = Xyloplax janetae | display_parents = 3 | greatgrandparent_authority = Baker, Rowe & Clark, 1986 | grandparent_authority = Baker, Rowe & Clark, 1986 | parent_authority = Baker, Rowe & Clark, 1986 | taxon = Xyloplax | authority = Baker, Rowe & Clark, 1986 | subdivision_ranks = Species | subdivision = Xyloplax janetae Xyloplax medusiformis Xyloplax turnerae }} 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. DistributionSea 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. ClassificationSince 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
References
1 : Peripodida |
随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识,基本涵盖了大多数领域的百科知识,是一部内容自由、开放的电子版国际百科全书。