| Portalia Temporal range:
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|---|---|
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| Holotype specimen of Portalia (right) preserved with Mackenzia (left) | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | incertae sedis |
| Genus: | †Portalia |
| Species: | †P. mira
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| Binomial name | |
| †Portalia mira Walcott, 1918
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Portalia mira is an extinct species of uncertain placement, described by American paleontologist Charles Walcott from a fossil discovered in the Burgess Shale and initially interpreted as a holothurian echinoderm by Walcott, but this interpretation has been disputed.[1][2]
- ^ Hoffman, Antoni; Niteki, Matthew H., eds. (1986). "Problematic Fossil Taxa". Oxford Monographs on Geology and Geophysics. 5. Oxford University Press: 174–175. ISBN 0-19-503992-0.
- ^ Madsen, Fritz Jensenius (1957). "On Walcott's supposed Cambrian holothurians". Journal of Paleontology. 31 (1). The Paleontological Society: 281–282. JSTOR i255711.