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1997.
Original Classification (root)
(Kingdom) Animalia Linnaeus, 1758
(Species) Halicryptus spinulosus Von Siebold, 1849
(Species) Priapulus caudatus de Lamarck, 1816
(Species) Urnatella gracilis Leidy, 1851
(Species) Pliciloricus enigmaticus Higgins & Kristensen, 1986
(Species) Echiniscoides sigismundi (Max Schultze, 1865) Plate, 1889
(Species) Macrobiotus hufelandi C.A.S. Schultze, 1834
(Species) Echinocyamus pusillus (Müller, 1776)
(Species) Rhopalura ophiocomae Giard, 1877
(Species) Rhopalura granosa D. Atkins, 1933
(Species) Tubiluchus corallicola van der Land, 1968
(Species) Halobiotus crispae R.M. Kristensen, 1982
(Species) Archechiniscus marci Schulz, 1953
(Species) Tanarctus arborspinosus Lindgren, 1971
(Species) Tanarctus longisetosus Grimaldi de Zio et al., 1982
(Species) Tanarctus ramazzottii Renaud-Mornant, 1975
(Species) Tanarctus tauricus Renaud-Debyser, 1959
(Species) Tanarctus gracilis Renaud-Mornant, 1980
(Species) Tanarctus dendriticus Renaud-Mornant, 1980
(Species) Tanarctus heterodactylus Renaud-Mornant, 1980
(Species) Actinarctus doryphorus Schulz, 1935
(Species) Actinarctus neretinus Grimaldi de Zio et al., 1982
(Species) Actinarctus physophorus Grimaldi de Zio et al., 1982
(Species) Florarctus antillensis van der Land, 1968
(Species) Florarctus acer Renaud-Mornant, 1989
(Species) Florarctus cinctus Renaud-Mornant, 1976
(Species) Florarctus hulingsi Renaud-Mornant, 1976
(Species) Wingstrandarctus corallinus R.M. Kristensen, 1984
(Species) Wingstrandarctus intermedius (Renaud-Mornant, 1967) Kristensen, 1984
(Species) Halechiniscus flabellatus Grimaldi de Zio et al., 1982
(Species) Halechiniscus guiteli Richters, 1908
(Species) Halechiniscus greveni Renaud-Mornant & Deroux, 1976
(Species) Halechiniscus perfectus Schulz, 1955
(Species) Halechiniscus remanei Schulz, 1955
(Species) Halechiniscus subterraneus Renaud-Debyser, 1959
(Species) Orzeliscus belopus du Bois-Reymond Marcus, 1952
(Species) Orzeliscus septentrionalis Schulz, 1953
(Species) Bathyechiniscus tetronyx Steiner, 1926
(Species) Pleocola limnoriae Cantacuzène, 1951
(Species) Raiarctus colurus Renaud-Mornant, 1981
(Species) Styraconyx hallasi Kristensen, 1977
(Species) Styraconyx haploceros Thulin, 1942
(Species) Styraconyx kristenseni Renaud-Mornant, 1981
(Species) Styraconyx nanoqsunguak Kristensen & Higgins, 1984
(Species) Styraconyx qivitoq Kristensen & Higgins, 1984
(Species) Styraconyx sargassi Thulin, 1942
(Species) Styraconyx paulae Robotti, 1971
(Species) Tetrakentron synaptae Cuénot, 1892
(Species) Tholoarctus natans Kristensen & Renaud-Mornant, 1983
(Species) Euclavarctus thieli Renaud-Mornant, 1975
(Species) Batillipes acaudatus Pollock, 1971
(Species) Batillipes annulatus Grimaldi de Zio, 1962
(Species) Batillipes bullacaudatus McGinty & Higgins, 1968
(Species) Batillipes carnonensis Fize, 1957
(Species) Batillipes dicrocercus Pollock, 1970
(Species) Batillipes friaufi Riggin, 1962
(Species) Batillipes littoralis Renaud-Debyser, 1959
(Species) Batillipes mirus Richters, 1909
(Species) Batillipes noerrevangi Kristensen, 1978
(Species) Batillipes pennaki Marcus, 1946
(Species) Batillipes phreaticus Renaud-Debyser, 1959
(Species) Batillipes roscoffensis Kristensen, 1978
(Species) Batillipes similis Schulz, 1955
(Species) Batillipes tubernatis Pollock, 1971
(Species) Megastygarctides orbiculatus McKirdy et al., 1976
(Species) Megastygarctides setoloso Morgan & O'Reilly, 1988
(Species) Mesostygarctus intermedius Renaud-Mornant, 1979
(Species) Parastygarctus higginsi Renaud-Debyser, 1965
(Species) Parastygarctus sterreri Renaud-Mornant, 1970
(Species) Stygarctus bradypus Schulz, 1951
(Species) Stygarctus granulatus Pollock, 1970
(Species) Stygarctus gourbaultae Renaud-Mornant, 1981
(Species) Neoarctus primigenius Grimaldi de Zio et al., 1992
(Species) Renaudarctus psammocryptus Kristensen & Higgins, 1984
(Species) Neostygarctus acanthophorus Grimaldi de Zio et al., 1982
(Species) Coronarctus tenellus Renaud-Mornant, 1974
(Species) Coronarctus laubieri Renaud-Mornant, 1987
(Species) Trogloarctus trionyches Villora-Moreno, 1996
(Species) Anisonyches diakidius Pollock, 1975
(Species) Echiniscoides hoepneri Kristensen & Hallas, 1980
(Species) Macrobiotus echinogenitus Richters, 1903
(Species) Halobiotus arcturulius Crisp & R.M. Kristensen, 1983
(Species) Isohypsibius prosostomus Thulin, 1928
(Species) Milnesium tardigradum Doyère, 1840
(Species) Loxosoma saltans Assheton, 1912
(Species) Loxosoma loxalina Assheton, 1912
(Species) Loxosoma singulare Keferstein, 1862
(Species) Loxosoma claparedi Bobin & Prenant, 1953
(Species) Loxosoma monensis Eggleston, 1965
(Species) Loxosoma pectinaricola Franzén, 1962
(Species) Loxosoma rhodinicola Franzén, 1962
(Species) Loxosoma loricatum Harmer, 1915
(Species) Loxosoma significans Nielsen, 1964
(Species) Loxosoma agile Nielsen, 1964
(Species) Loxomespilon perezi Bobin & Prenant, 1953
(Species) Loxosomella antedonis Mortensen, 1911
(Species) Loxosomella fagei Bobin & Prenant, 1953
(Species) Loxosomella elegans Nielsen, 1964
(Species) Loxosomella similis Nielsen, 1964
(Species) Loxosomella polita Nielsen, 1964
(Species) Loxosomella ornata Nielsen, 1964
(Species) Loxosomella marsypos Nielsen & Ryland, 1961
(Species) Loxosomella atkinsae Bobin & Prenant, 1953
(Species) Loxosomella fauveli Bobin & Prenant, 1953
(Species) Loxosomella compressa Nielsen & Ryland, 1961
(Species) Loxosomella nordgaardi Ryland, 1961
(Species) Loxosomella glandulifera Franzén, 1962
(Species) Loxosomella discopoda Nielsen & Ryland, 1961
(Species) Loxosomella scaura Nielsen, 1964
(Species) Loxosomella varians Nielsen, 1964
(Species) Loxosomella aripes Nielsen, 1964
(Species) Loxosomella brucei Eggleston, 1965
(Species) Pedicellina nutans Dalyell, 1848
(Species) Pedicellina hispida Ryland, 1965
(Species) Barentsia elongata Jullien & Calvet, 1903
(Species) Barentsia matsushimana Toriumi, 1951
(Species) Barentsia major Hincks, 1888
(Species) Barentsia bulbosa Hincks, 1880
(Species) Barentsia variarticulata K.A. Andersson, 1902
(Species) Barentsia laxa Kirkpatrick, 1890
(Species) Barentsia stiria Jullien & Calvet, 1903
(Species) Tubiluchus arcticus Adrianov, Malakhov, Tchesunov & Tzetlin, 1989
(Species) Echinoderes borealis Greeff, 1869
(Species) Echinoderes dujardini Claparède, 1863
(Species) Echinoderes ferrugineus Zelinka, 1928
(Species) Echiniscus quadrispinosus Richters, 1902
(Species) Echinoderes krishnaswamyi Higgins, 1985
(Species) Echinoderes kristenseni Higgins, 1985
(Species) Echinoderes lanuginosa Greeff, 1869
(Species) Echinoderes levanderi Karling, 1954
(Species) Echinoderes minimus Zelinka, 1928
(Species) Echinoderes monocercus Claparède, 1863
(Species) Echinoderes setiger Greeff, 1869
(Species) Echinoderes worthingi Southern, 1914
(Species) Campyloderes vanhoeffeni Zelinka, 1913
(Species) Campyloderes adherens Nyholm, 1947
(Species) Campyloderes macquariae Johnston, 1938
(Species) Semnoderes armiger Zelinka, 1928
(Species) Paracentrophyes praedictus Higgins, 1983
(Species) Pycnophyes calmani Southern, 1914
(Species) Pycnophyes communis Zelinka, 1908
(Species) Pycnophyes flaveolatus Zelinka, 1928
(Species) Pycnophyes kielensis Zelinka, 1928
(Species) Pycnophyes maximus Reimer, 1963
(Species) Pycnophyes zelinkae Southern, 1914
(Species) Kinorhynchus paraneapolitanus Sheremetevskij, 1974
(Species) Rugiloricus cauliculus Higgins & Kristensen, 1986
(Species) Dicyema paradoxum von Kölliker, 1849
(Species) Dicyema typus van Beneden, 1876
(Species) Dicyema macrocephalum (van Beneden, 1878)
(Species) Dicyema microcephalum Whitman, 1883
(Species) Dicyemennea lameerei Nouvel, 1932
(Species) Rhopalura philinae Lang, 1951
(Species) Rhopalura paraphanostomae Westblad, 1942
(Species) Rhopalura pterocirri de Saint-Joseph, 1896
(Species) Rhopalura pelseneeri Caullery & Mesnil, 1901
(Species) Rhopalura intoshi Metschnikoff, 1881
(Species) Rhopalura litoralis Shtein, 1954
(Species) Rhopalura major Shtein, 1954
(Species) Intoshia leptoplanae (Giard, 1877)
(Species) Intoshia linei (Giard, 1877)
(Species) Stoecharthrum giardi Caullery & Mesnil, 1899
(Species) Pelmatosphaera polycirri M. Caullery & F. Mesnil, 1904