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Hemichordata (acorn worm)

Taxonomy
Hemichordata was named by Bateson (1885). It is extant.

It was assigned to Ambulacralia by Zrzavy et al. (1998); to Metazoa by Sepkoski (2002); and to Ambulacraria by Edgecombe et al. (2011) and Nielsen (2012).

Synonymy list
YearName and author
1885Hemichordata Bateson
1998Hemichordata Zrzavy et al.
2002Hemichordata Sepkoski
2011Hemichordata Edgecombe et al. p. 153 figs. Fig. 1
2012Hemichordata Nielsen p. 335

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Life
RankNameAuthor
Deuterostomia
Ambulacraria
phylumHemichordataBateson 1885
phylumHemichordataBateson 1885

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

Ph. Hemichordata Bateson 1885 [acorn worm]
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Fm. Harrimaniidae Spengel 1901
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G. Saccoglossus Schimkewitsch 1892
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Saccoglossus testa Cameron 2016
G. †Spartobranchus Caron et al. 2013
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Spartobranchus tenuis Caron et al. 2013
Fm. Spengelidae Willey 1899
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G. †Mazoglossus Bardack 1997
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Mazoglossus ramsdelli Bardack 1997
Cl. Pterobranchia Lankester 1877 [pterobranch]
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Fm. †Cephalodiscidae Harmer 1905
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Invalid names: Eocephalodiscidae Kozłowski 1949 [synonym]
Subcl. Graptolithina Bronn 1849 [graptolite]
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Unr. †Acanthastida Kozlowski 1949
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G. †Acanthastus Kozlowski 1948
Or. †Camaroidea
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Fm. †Bithecocamaridae Bulman 1955
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Fm. †Cysticamaridae Bulman 1955
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Or. †Crustoidea Bulman 1970
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G. †Ruedemannicrusta Kozlowski 1962
Invalid names: Hormograptidae Bulman 1970 [empty]
Fm. †Cyclograptidae Bulman 1938
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G. †Camarotubus Mierzejewski 2001
G. †Conitubus
G. †Marsipograptus Ruedemann 1936
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Marsipograptus bullatus Ruedemann 1936
Marsipograptus percensis Ruedemann 1936
Or. †Dendroidea Nicholson 1872
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Fm. †Acanthograptidae Bulman 1938
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Invalid names: Odontocaulis Lapworth 1881 [synonym]
G. †Dictyonema Hall 1851
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Invalid names: Archaeodictyota [synonym]
G. †Palaeodictyota Whtifield 1902
G. †Thallograptus Ruedemann 1925
G. †Aretograptus Obut and Sobolevskaya 1962
Fm. †Dendrograptidae Roemer 1897
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G. †Airograptus Ruedemann 1916
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Invalid names: Clematograptus Hopkinson 1875 [replaced]
G. †Dendrograptus Hall 1858
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Invalid names: Rhizograptus Spencer 1878 [synonym]
G. †Polygonograptus Boucek 1957
Invalid names: Chaunograptidae Bulman 1955 [empty]
Fm. †Dithecodendridae Obut 1964
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G. †Archaeolafoea Chapman 1919
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Archaeolafoea longicornis Chapman 1919
Archaeolafoea monegettae Chapman 1919
G. †Bulmanidendrum Obut 1974
G. †Dalyia Walcott 1919
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Dalyia annularoides Resser and Howell 1938
Dalyia pennsylvanica Resser and Howell 1938
Dalyia racemata Walcott 1919
G. †Karasidendrum Sennikov 1998
G. †Ovetograptus Sdzuy 1974
G. †Protodendrum Sennikov 1998
G. †Siberiodendrum Obut 1964
G. †Sibiriograptus Obut 1964
G. †Sotograptus Sdzuy 1974
G. †Tarnagraptus Sdzuy 1974
Unr. †Graptoblasti Kozlowski 1949
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Unr. †Graptoloida Maletz et al. 2009 [graptoloid]
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Unr. †Eugraptoloida Maletz et al. 2009
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Unr. †Reclinata Maletz et al. 2009
Invalid names: Panreclinata Maletz et al. 2009 [empty]
Or. †Graptoloidea Lapworth 1875
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Subor. †Axonophora Frech 1897
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Infraor. †Diplograptina Lapworth 1880
Infraor. †Neograptina Storch et al. 2011
G. †Crinitograptus Rickards 1995
Subor. †Dichograptina Lapworth 1873
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Fm. †Dichograptidae Lapworth 1873
Fm. †Phyllograptidae Kiessling 2009
Fm. †Pterograptidae Mu 1950
Fm. †Tetragraptidae Frech 1897
Fm. †Didymograptidae Mu 1950
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G. †Baltograptus Maletz 1994
G. †Expansograptus Bouček and Přibyl 1953
Subor. †Didymograptina Lapworth 1875
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Fm. †Abrograptidae Mu 1958
Fm. †Corynoididae Bulman 1944
Fm. †Nemagraptidae Lapworth 1873
Subor. †Glossograptina Jaanuson 1960
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Fm. †Cyrtograptidae Boucek 1933
Fm. †Glossograptidae Lapworth 1873
Fm. †Isograptidae Harris 1933
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Invalid names: Arienigraptidae Yu and Fang 1981 [synonym]
Invalid names: Bireclinata Maletz et al. 2009 [synonym]
Subor. †Graptodendroidina Mu and Lin 1981
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Fm. †Anisograptidae Bullman 1950
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Invalid names: Nephelograptidae Boucek 1957 [synonym]
Fm. †Mastigograptidae Bates and Urbanek 2002
Fm. †Kinnegraptidae Mu 1974
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G. †Paradelograptus Erdtmann et al. 1987
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Laxograptus shellyi Henderson 1983
G. †Lenzograptus Loydell 2020
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Invalid names: Lenzia Rickards and Wright 1999 [replaced]
Subor. †Monograptina Lapworth 1880
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Fm. †Cryptograptidae Boucek 1933
G. †Neocolonograptus Urbanek 1997
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Neocolonograptus ultimus Perner 1899
Subor. †Sinograpta Maletz 2009
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Fm. †Sinograptidae Mu 1957
Subor. †Sinograptina Maletz 2009
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Fm. †Sigmagraptidae Cooper and Fortey 1982
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Uncinatograptus uncinatus Tullberg 1883
Invalid names: Bryograptidae Obut 1957 [empty], Dichograptacea Lapworth 1873 [empty], Virgellina Fortey and Cooper 1986 [empty]
G. †Palmatophycus Boucek 1941
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Palmatophycus contractus Boucek 1941
Fm. †Rhabdopleuridae Harmer 1905
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G. †Calyxhydra Kozlowski 1959
G. †Chitinodendron Eisenack 1938
G. Cylindrotheca Rabenhorst 1848
G. †Haplograptus Ruedemann 1933
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Haplograptus wisconsinensis Ruedemann 1933
G. Rhabdopleura Allman 1869
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Invalid names: Rhabdopleura Allman 1867 [objective synonym]
G. Rhapdopleura Allman 1869
Fm. †Wimanicrustidae Bulman 1970
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G. †Bulmanicrusta Kozlowski 1962
Invalid names: Diplograptoidea Lapworth 1880 [empty], Dithecoidea Obut 1964 [empty], Graptolithus Linnaeus 1768 [invalid subgroup], Graptovermida Kozlowski 1949 [empty], Limpidograptus [nomen vanum], Stolonoidea Kozlowski 1938 [empty], Thamnograptus [nomen vanum], Trigonograptus Lapworth 1873 [nomen vanum], Tuboidea Kozlowski 1938 [empty]
G. †Mastograptus LoDuca and Kramer 2014
Invalid names: Rhabdopleurida Fowler 1892 [empty]
Diagnosis
No diagnoses are available