Isoxyida

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.

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
  • Isoxysidae Brooks & Caster, 1956
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