Classification of Van Der Laan 2019
Unr. Chordata Haeckel 1874
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Subph. Craniata Linnaeus 1758
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Supercl. †Pteraspidomorphi Goodrich 1909 [jawless fish]
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Cl. †Pteraspidomorpha
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Subcl. †Arandaspida Ritchie and Gilbert-Tomlinson 1977
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Or. †Arandaspidiformes Ritchie and Gilbert-Tomlinson 1977
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Fm. †Arandaspididae Ritchie and Gilbert-Tomlinson 1977
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G. †Arandaspis Ritchie and Gilbert-Tomlinson 1977
Invalid names: Porophoraspidae Halstead 1993 [empty]
Subcl. †Astraspida Berg 1940
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Or. †Astraspidiformes Berg 1940
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Fm. †Tesakoviaspididae Karatajute-Talimaa and Smith 2004
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G. †Tesakoviaspis Karatajute-Talimaa and Meredith Smith 2004
Subcl. †Heterostraci Lankester 1868
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Or. †Cyathaspidiformes Kaier 1930
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Subor. †Cyathaspidoidei
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Invalid names: Americaspidae Fowler 1947 [empty], Irregularaspidae Kiaer and Heinz 1935 [empty]
Subor. †Siberiaspidoidei
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Or. †Lepidaspidiformes Halstead 1993
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Or. †Tesseraspidiformes
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Or. †Tolypelepidiformes
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Or. †Traquairaspidiformes Stensio 1958
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Fm. †Traquairaspidae Kiaer 1932
Invalid names: Phialaspididae White 1946 [empty]
Invalid names: Cardipeltiformes Bryant 1933 [empty]
Unr. Vertebrata Lamarck 1801 [vertebrate]
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Cl. †Petromyzontida
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Or. Petromyzontiformes Berg 1940 [lamprey]
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Fm. Geotriidae
Fm. Mordaciidae Gill 1893
Fm. Petromyzontidae [lamprey]
Invalid names: Mayomyzontidae Bardack and Zangerl 1971 [empty]
Invalid names: Cephalaspidomorphi Moy-Thomas and Mile 1971 [synonym]
Subor. †Amphiaspidoidei
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