Portalia mira is a fossil from the Burgess Shale that was originally described by Charles Walcott as a holothurian echinoderm. A later interpretation by F. Madsen in 1957 posits P. mira as a sponge.
|Reconstruction as a holothurian-like organism|
- "Portalia mira". Burgess Shale Fossil Gallery. Virtual Museum of Canada. 2011.