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Porcellanasteridae
The Porcellanasteridae are a family of sea stars in the order Paxillosida. These sea stars are found at abyssal depths. The World Asteroidea Database includes these genera Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nomenclat ... in this family: *'' Abyssaster'' Madsen, 1961 *'' Benthogenia'' Fisher, 1911 *'' Damnaster'' H.E.S. Clark & McKnight, 1994 *'' Eremicaster'' Fisher, 1905 *'' Hyphalaster'' Sladen, 1883 *'' Lethmaster'' Belyaev, 1969 *'' Lysaster'' Bell, 1909 *'' Porcellanaster'' Wyville Thomson, 1877 *'' Sidonaster'' Koehler, 1909 *'' Styracaster'' Sladen, 1883 *'' Thoracaster'' Sladen, 1883 *'' Vitjazaster'' Belyaev, 1969 References Paxillosida Echinoderm families {{Asteroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paxillosida
The Paxillosida are a large order (biology), order of sea stars. Characteristics Paxillosida adults lack an anus and have no suckers on their tube feet. They do not develop the brachiolaria stage in their early development.Matsubara, M., Komatsu, M., Araki, T., Asakawa, S., Yokobori, S.-I., Watanabe, K. & Wada, H. (2005) The phylogenetic status of Paxillosida (Asteroidea) based on complete mitochondrial DNA sequences. Molecular Genetics and Evolution, 36, 598–605 They possess marginal plates, and have sessile pedicellariae. They mostly inhabit soft-bottomed environments of sand or mud. Systematics Recent analyses suggest Paxillosida may be a sister taxon of Asterina (starfish), Asterina. The order is divided into these families: * family Astropectinidae Gray, 1840 * family Ctenodiscidae Sladen, 1889 * family Goniopectinidae Verrill, 1889 * family Luidiidae Sladen, 1889 * family Porcellanasteridae Sladen, 1883 * family Pseudarchasteridae * family Radiasteridae Fisher, 1916 Fil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animal
Animals are multicellular, eukaryotic organisms in the Kingdom (biology), biological kingdom Animalia. With few exceptions, animals Heterotroph, consume organic material, Cellular respiration#Aerobic respiration, breathe oxygen, are Motility, able to move, can Sexual reproduction, reproduce sexually, and go through an ontogenetic stage in which their body consists of a hollow sphere of Cell (biology), cells, the blastula, during Embryogenesis, embryonic development. Over 1.5 million Extant taxon, living animal species have been Species description, described—of which around 1 million are Insecta, insects—but it has been estimated there are over 7 million animal species in total. Animals range in length from to . They have Ecology, complex interactions with each other and their environments, forming intricate food webs. The scientific study of animals is known as zoology. Most living animal species are in Bilateria, a clade whose members have a Symmetry in biology#Bilate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
