| | Family | Subfamily | Genus | Subgenus | Species | Source | | Omartacaridae | | Omartacarus | | ferradasae | COOK 1988 |
| Omartacaridae | | Omartacarus | | paraelongatus | FERNANDEZ & GROSSO 1991 |
| Omartacaridae | | Omartacarus | | tucumanensis | FERNANDEZ 1985 |
| Oxidae | | Flabellifrontipoda | | allarka | COOK 1988 |
| Oxidae | | Flabellifrontipoda | | allasa | COOK 1988 |
| Oxidae | | Flabellifrontipoda | | dolichopalpis | COOK 1988 |
| Oxidae | | Flabellifrontipoda | | penai | COOK 1988 |
| Oxidae | | Flabellifrontipoda | | tranasa | COOK 1988 |
| Oxidae | | Flabellifrontipoda | | unoka | COOK 1988 |
| Oxidae | | Frontipoda | | lewisi | WILES 1999 |
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