Concise hierarchy
(Kingdom) Animalia - (Phylum) Chordata - (Class) Mammalia - (Order) Cetartiodactyla
Subsequent positions
Original entries
| Questionably †Anoplonassa (Genus) Cope, 1869 | |
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| Questionably †Berardiopsis (Genus) Portis, 1886, nom. dub. | |
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| Questionably †Eboroziphius (Genus) Leidy, 1876, nom. dub. | |
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| Questionably Indopacetus (Genus) Moore, 1968 | |
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| Questionably †Medocinia (Genus) de Muizon, 1988 | |
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| Questionably †Messapicetus (Genus) Bianucci, Landini & Varola, 1992 | |
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| Questionably †Ninoziphius (Genus) de Muizon, 1983 | |
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| Questionably †Notocetus (Genus) Moreno, 1892 | |
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| Questionably †Palaeoziphius (Genus) Abel, 1905, nom. dub. | |
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| Questionably †Pelycorhamphus (Genus) Cope, 1895, nom. dub. | |
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| Questionably †Proroziphius (Genus) Leidy, 1876 | |
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| Questionably †Squalodelphis (Genus) Dal Piaz, 1916 | |
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| Questionably †Squaloziphius (Genus) de Muizon, 1991 | |
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| Questionably Tasmacetus (Genus) Oliver, 1937 | |
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| Questionably †Ziphioides (Genus) Probst, 1886, nom. dub. | |
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| Questionably †Ziphirostrum (Genus) Du Bus, 1868 | |
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Subsequent entries
Current position
Historical positions
Number of Subtaxa