4-415: 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 . Intestine and anus are absent. Sea daisies have been discovered in three localities, including deep-sea habitats off New Zealand,
8-465: Is a Xyloplax of the family Xyloplacidae . It lives on the surface of wood sunken to abyssal depths. Xyloplax janetae is a flattened disk, from 2–10 millimetres (0.079–0.394 in) in diameter, and about 4 millimetres (0.16 in) thick. It has adambulacral spines which are spines that project radially from the margin of the animal, of distinct morphology. On its dorsal ( abactinal surface) it has many projecting abactinal spines whose morphology
12-478: 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. 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
16-582: 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 Xyloplax janetae Xyloplax janetae
#103896