| Siphusauctum Temporal range:
| |
|---|---|
| |
| Holotype of S. gregarium | |
| |
| Fossil of S. lloydguntheri | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Stem group: | Ctenophora |
| Family: | †Siphusauctidae O'Brien & Caron, 2012 |
| Genus: | †Siphusauctum O'Brien & Caron, 2012 |
| Species | |
| |
Siphusauctum is an extinct genus of filter-feeding animals that lived during the Middle Cambrian about 510 million years ago.