Pikaia gracilens
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Navigazione
[modifica]Navigazione: Chordata |
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Superregnum: Eukaryota |
Stem-group Chordata
Genus: †Pikaia
Species: †Pikaia gracilens
Nome
[modifica]Pikaia gracilens Walcott, 1911
Riferimenti
[modifica]Primary references
[modifica]- Walcott, C.D. 1911. Middle Cambrian annelids. In: Cambrian geology and paleontology. II. Smithsonian Miscellaneous Collections 57: 109–144, pls. 18–23. BHL.