Isoxyida
| Isoxyida Temporal range: | |
|---|---|
| Restoration of Isoxys curvirostratus | |
| Restoration of Surusicaris elegans | |
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Order: | †Isoxyida Simonetta & Delle Cave, 1975 |
| Family: | †Isoxyidae Vogdes, 1893 |
| Genera | |
| Synonyms | |
| |
Isoxyids are members of the order Isoxyida and the family Isoxyidae, a group of basal arthropods that existed during the Cambrian period. It contains two genera, Isoxys, with 20 species found worldwide, and Surusicaris known from a single species found in the Burgess Shale of Canada. They are distinguished by their bivalved carapaces and pair of upward curving grasping frontal appendages.